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# Maybe the checkpoint is sharded, we try to grab the index name in this case.
if resolved_archive_file is None and filename == FLAX_WEIGHTS_NAME:
resolved_archive_file = cached_file(
pretrained_model_name_or_path, FLAX_WEIGHTS_INDEX_NAME, **cached_file_kwargs
)
if resolved_archive_file is not None:
is_sharded = True
# Maybe the checkpoint is pytorch sharded, we try to grab the pytorch index name in this case.
if resolved_archive_file is None and from_pt:
resolved_archive_file = cached_file(
pretrained_model_name_or_path, WEIGHTS_INDEX_NAME, **cached_file_kwargs
)
if resolved_archive_file is not None:
is_sharded = True | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
# If we still haven't found anything, look for `safetensors`.
if resolved_archive_file is None:
# No support for sharded safetensors yet, so we'll raise an error if that's all we find.
filename = SAFE_WEIGHTS_NAME
resolved_archive_file = cached_file(
pretrained_model_name_or_path, SAFE_WEIGHTS_NAME, **cached_file_kwargs
) | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
# Since we set _raise_exceptions_for_missing_entries=False, we don't get an exception but a None
# result when internet is up, the repo and revision exist, but the file does not.
if resolved_archive_file is None:
# Otherwise, maybe there is a TF or Torch model file. We try those to give a helpful error
# message.
has_file_kwargs = {
"revision": revision,
"proxies": proxies,
"token": token,
"cache_dir": cache_dir,
"local_files_only": local_files_only,
}
if has_file(pretrained_model_name_or_path, SAFE_WEIGHTS_INDEX_NAME, **has_file_kwargs):
is_sharded = True
raise NotImplementedError( | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
"Support for sharded checkpoints using safetensors is coming soon!"
)
elif has_file(pretrained_model_name_or_path, WEIGHTS_NAME, **has_file_kwargs):
raise EnvironmentError(
f"{pretrained_model_name_or_path} does not appear to have a file named"
f" {FLAX_WEIGHTS_NAME} but there is a file for PyTorch weights. Use `from_pt=True` to"
" load this model from those weights."
)
elif has_file(pretrained_model_name_or_path, WEIGHTS_INDEX_NAME, **has_file_kwargs):
raise EnvironmentError(
f"{pretrained_model_name_or_path} does not appear to have a file named"
f" {FLAX_WEIGHTS_INDEX_NAME} but there is a sharded file for PyTorch weights. Use" | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
" `from_pt=True` to load this model from those weights."
)
else:
raise EnvironmentError(
f"{pretrained_model_name_or_path} does not appear to have a file named"
f" {FLAX_WEIGHTS_NAME} or {WEIGHTS_NAME}."
)
except EnvironmentError:
# Raise any environment error raise by `cached_file`. It will have a helpful error message adapted
# to the original exception.
raise
except Exception:
# For any other exception, we throw a generic error.
raise EnvironmentError(
f"Can't load the model for '{pretrained_model_name_or_path}'. If you were trying to load it" | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
" from 'https://huggingface.co/models', make sure you don't have a local directory with the"
f" same name. Otherwise, make sure '{pretrained_model_name_or_path}' is the correct path to a"
f" directory containing a file named {FLAX_WEIGHTS_NAME} or {WEIGHTS_NAME}."
) | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
if is_local:
logger.info(f"loading weights file {archive_file}")
resolved_archive_file = archive_file
filename = resolved_archive_file.split(os.path.sep)[-1]
else:
logger.info(f"loading weights file {filename} from cache at {resolved_archive_file}")
else:
resolved_archive_file = None | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
# We'll need to download and cache each checkpoint shard if the checkpoint is sharded.
if is_sharded:
# resolved_archive_file becomes a list of files that point to the different checkpoint shards in this case.
resolved_archive_file, _ = get_checkpoint_shard_files(
pretrained_model_name_or_path,
resolved_archive_file,
cache_dir=cache_dir,
force_download=force_download,
proxies=proxies,
resume_download=resume_download,
local_files_only=local_files_only,
token=token,
user_agent=user_agent,
revision=revision,
subfolder=subfolder,
_commit_hash=commit_hash,
) | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
safetensors_from_pt = False
if filename == SAFE_WEIGHTS_NAME:
with safe_open(resolved_archive_file, framework="flax") as f:
safetensors_metadata = f.metadata()
if safetensors_metadata is None or safetensors_metadata.get("format") not in ["pt", "tf", "flax"]:
raise OSError(
f"The safetensors archive passed at {resolved_archive_file} does not contain the valid metadata."
" Make sure you save your model with the `save_pretrained` method."
)
safetensors_from_pt = safetensors_metadata.get("format") == "pt"
# init random models
model = cls(config, *model_args, _do_init=_do_init, **model_kwargs) | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
if from_pt or safetensors_from_pt:
state = load_pytorch_checkpoint_in_flax_state_dict(model, resolved_archive_file, is_sharded)
else:
if is_sharded:
state = cls.load_flax_sharded_weights(resolved_archive_file)
else:
state = cls.load_flax_weights(resolved_archive_file)
# make sure all arrays are stored as jnp.arrays
# NOTE: This is to prevent a bug this will be fixed in Flax >= v0.3.4:
# https://github.com/google/flax/issues/1261
if _do_init:
state = jax.tree_util.tree_map(jnp.array, state)
else:
# keep the params on CPU if we don't want to initialize
state = jax.tree_util.tree_map(lambda x: jax.device_put(x, jax.local_devices(backend="cpu")[0]), state) | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
if "batch_stats" in state: # if flax model contains batch norm layers
# if model is base model only use model_prefix key
if (
cls.base_model_prefix not in dict(model.params_shape_tree["params"])
and cls.base_model_prefix in state["params"]
):
state["params"] = state["params"][cls.base_model_prefix]
state["batch_stats"] = state["batch_stats"][cls.base_model_prefix]
# if model is head model and we are loading weights from base model
# we initialize new params dict with base_model_prefix
if (
cls.base_model_prefix in dict(model.params_shape_tree["params"])
and cls.base_model_prefix not in state["params"]
):
state = {
"params": {cls.base_model_prefix: state["params"]},
"batch_stats": {cls.base_model_prefix: state["batch_stats"]},
} | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
else:
# if model is base model only use model_prefix key
if cls.base_model_prefix not in dict(model.params_shape_tree) and cls.base_model_prefix in state:
state = state[cls.base_model_prefix]
# if model is head model and we are loading weights from base model
# we initialize new params dict with base_model_prefix
if cls.base_model_prefix in dict(model.params_shape_tree) and cls.base_model_prefix not in state:
state = {cls.base_model_prefix: state}
# flatten dicts
state = flatten_dict(state)
random_state = flatten_dict(unfreeze(model.params if _do_init else model.params_shape_tree))
missing_keys = model.required_params - set(state.keys())
unexpected_keys = set(state.keys()) - model.required_params | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
# Disabling warning when porting pytorch weights to flax, flax does not uses num_batches_tracked
for unexpected_key in unexpected_keys.copy():
if "num_batches_tracked" in unexpected_key[-1]:
unexpected_keys.remove(unexpected_key)
if missing_keys and not _do_init:
logger.warning(
f"The checkpoint {pretrained_model_name_or_path} is missing required keys: {missing_keys}. "
"Make sure to call model.init_weights to initialize the missing weights."
)
cls._missing_keys = missing_keys | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
# Mistmatched keys contains tuples key/shape1/shape2 of weights in the checkpoint that have a shape not
# matching the weights in the model.
mismatched_keys = []
for key in state.keys():
if key in random_state and state[key].shape != random_state[key].shape:
if ignore_mismatched_sizes:
mismatched_keys.append((key, state[key].shape, random_state[key].shape))
state[key] = random_state[key]
else:
raise ValueError(
f"Trying to load the pretrained weight for {key} failed: checkpoint has shape "
f"{state[key].shape} which is incompatible with the model shape {random_state[key].shape}. "
"Using `ignore_mismatched_sizes=True` if you really want to load this checkpoint inside this "
"model."
) | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
# add missing keys as random parameters if we are initializing
if missing_keys and _do_init:
for missing_key in missing_keys:
state[missing_key] = random_state[missing_key]
# remove unexpected keys to not be saved again
for unexpected_key in unexpected_keys:
del state[unexpected_key] | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
if len(unexpected_keys) > 0:
logger.warning(
f"Some weights of the model checkpoint at {pretrained_model_name_or_path} were not used when"
f" initializing {model.__class__.__name__}: {unexpected_keys}\n- This IS expected if you are"
f" initializing {model.__class__.__name__} from the checkpoint of a model trained on another task or"
" with another architecture (e.g. initializing a BertForSequenceClassification model from a"
" BertForPreTraining model).\n- This IS NOT expected if you are initializing"
f" {model.__class__.__name__} from the checkpoint of a model that you expect to be exactly identical"
" (initializing a BertForSequenceClassification model from a BertForSequenceClassification model)."
)
else:
logger.info(f"All model checkpoint weights were used when initializing {model.__class__.__name__}.\n") | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
if len(missing_keys) > 0:
logger.warning(
f"Some weights of {model.__class__.__name__} were not initialized from the model checkpoint at"
f" {pretrained_model_name_or_path} and are newly initialized: {missing_keys}\nYou should probably"
" TRAIN this model on a down-stream task to be able to use it for predictions and inference."
)
elif len(mismatched_keys) == 0:
logger.info(
f"All the weights of {model.__class__.__name__} were initialized from the model checkpoint at"
f" {pretrained_model_name_or_path}.\nIf your task is similar to the task the model of the checkpoint"
f" was trained on, you can already use {model.__class__.__name__} for predictions without further"
" training."
)
if len(mismatched_keys) > 0:
mismatched_warning = "\n".join(
[ | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
f"- {key}: found shape {shape1} in the checkpoint and {shape2} in the model instantiated"
for key, shape1, shape2 in mismatched_keys
]
)
logger.warning(
f"Some weights of {model.__class__.__name__} were not initialized from the model checkpoint at"
f" {pretrained_model_name_or_path} and are newly initialized because the shapes did not"
f" match:\n{mismatched_warning}\nYou should probably TRAIN this model on a down-stream task to be able"
" to use it for predictions and inference."
) | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
# dictionary of key: dtypes for the model params
param_dtypes = jax.tree_util.tree_map(lambda x: x.dtype, state)
# extract keys of parameters not in jnp.float32
fp16_params = [k for k in param_dtypes if param_dtypes[k] == jnp.float16]
bf16_params = [k for k in param_dtypes if param_dtypes[k] == jnp.bfloat16]
# raise a warning if any of the parameters are not in jnp.float32
if len(fp16_params) > 0:
logger.warning(
f"Some of the weights of {model.__class__.__name__} were initialized in float16 precision from "
f"the model checkpoint at {pretrained_model_name_or_path}:\n{fp16_params}\n"
"You should probably UPCAST the model weights to float32 if this was not intended. "
"See [`~FlaxPreTrainedModel.to_fp32`] for further information on how to do this."
) | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
if len(bf16_params) > 0:
logger.warning(
f"Some of the weights of {model.__class__.__name__} were initialized in bfloat16 precision from "
f"the model checkpoint at {pretrained_model_name_or_path}:\n{bf16_params}\n"
"You should probably UPCAST the model weights to float32 if this was not intended. "
"See [`~FlaxPreTrainedModel.to_fp32`] for further information on how to do this."
) | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
# If it is a model with generation capabilities, attempt to load the generation config
if model.can_generate():
try:
model.generation_config = GenerationConfig.from_pretrained(
pretrained_model_name_or_path,
cache_dir=cache_dir,
force_download=force_download,
resume_download=resume_download,
proxies=proxies,
local_files_only=local_files_only,
token=token,
revision=revision,
subfolder=subfolder,
_from_auto=from_auto_class,
_from_pipeline=from_pipeline,
**kwargs,
)
except OSError:
logger.info(
"Generation config file not found, using a generation config created from the model config."
)
pass | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
if _do_init:
# set correct parameters
model.params = unflatten_dict(state)
return model
else:
return model, unflatten_dict(state)
def save_pretrained(
self,
save_directory: Union[str, os.PathLike],
params=None,
push_to_hub=False,
max_shard_size="10GB",
token: Optional[Union[str, bool]] = None,
safe_serialization: bool = False,
**kwargs,
):
"""
Save a model and its configuration file to a directory, so that it can be re-loaded using the
`[`~FlaxPreTrainedModel.from_pretrained`]` class method | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
Arguments:
save_directory (`str` or `os.PathLike`):
Directory to which to save. Will be created if it doesn't exist.
push_to_hub (`bool`, *optional*, defaults to `False`):
Whether or not to push your model to the Hugging Face model hub after saving it. You can specify the
repository you want to push to with `repo_id` (will default to the name of `save_directory` in your
namespace).
max_shard_size (`int` or `str`, *optional*, defaults to `"10GB"`):
The maximum size for a checkpoint before being sharded. Checkpoints shard will then be each of size
lower than this size. If expressed as a string, needs to be digits followed by a unit (like `"5MB"`).
<Tip warning={true}>
If a single weight of the model is bigger than `max_shard_size`, it will be in its own checkpoint shard
which will be bigger than `max_shard_size`. | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
</Tip>
token (`str` or `bool`, *optional*):
The token to use as HTTP bearer authorization for remote files. If `True`, or not specified, will use
the token generated when running `huggingface-cli login` (stored in `~/.huggingface`).
kwargs (`Dict[str, Any]`, *optional*):
Additional key word arguments passed along to the [`~utils.PushToHubMixin.push_to_hub`] method.
safe_serialization (`bool`, *optional*, defaults to `False`):
Whether to save the model using `safetensors` or through msgpack.
"""
use_auth_token = kwargs.pop("use_auth_token", None) | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
if use_auth_token is not None:
warnings.warn(
"The `use_auth_token` argument is deprecated and will be removed in v5 of Transformers. Please use `token` instead.",
FutureWarning,
)
if token is not None:
raise ValueError(
"`token` and `use_auth_token` are both specified. Please set only the argument `token`."
)
token = use_auth_token
if token is not None:
kwargs["token"] = token
if os.path.isfile(save_directory):
logger.error(f"Provided path ({save_directory}) should be a directory, not a file")
return
os.makedirs(save_directory, exist_ok=True) | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
if push_to_hub:
commit_message = kwargs.pop("commit_message", None)
repo_id = kwargs.pop("repo_id", save_directory.split(os.path.sep)[-1])
repo_id = self._create_repo(repo_id, **kwargs)
files_timestamps = self._get_files_timestamps(save_directory)
# get abs dir
save_directory = os.path.abspath(save_directory)
# save config as well
self.config.architectures = [self.__class__.__name__[4:]]
# If we have a custom model, we copy the file defining it in the folder and set the attributes so it can be
# loaded from the Hub.
if self._auto_class is not None:
custom_object_save(self, save_directory, config=self.config)
self.config.save_pretrained(save_directory)
if self.can_generate():
self.generation_config.save_pretrained(save_directory) | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
# save model
weights_name = SAFE_WEIGHTS_NAME if safe_serialization else FLAX_WEIGHTS_NAME
output_model_file = os.path.join(save_directory, weights_name)
shards, index = flax_shard_checkpoint(params if params is not None else self.params, max_shard_size)
# Clean the folder from a previous save
for filename in os.listdir(save_directory):
full_filename = os.path.join(save_directory, filename)
weights_no_suffix = weights_name.replace(".bin", "").replace(".safetensors", "")
if (
filename.startswith(weights_no_suffix)
and os.path.isfile(full_filename)
and filename not in shards.keys()
):
os.remove(full_filename) | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
if index is None:
if safe_serialization:
params = params if params is not None else self.params
flat_dict = flatten_dict(params, sep=".")
safe_save_file(flat_dict, output_model_file, metadata={"format": "flax"})
else:
with open(output_model_file, "wb") as f:
params = params if params is not None else self.params
model_bytes = to_bytes(params)
f.write(model_bytes) | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
else:
save_index_file = os.path.join(save_directory, FLAX_WEIGHTS_INDEX_NAME)
# Save the index as well
with open(save_index_file, "w", encoding="utf-8") as f:
content = json.dumps(index, indent=2, sort_keys=True) + "\n"
f.write(content)
logger.info(
f"The model is bigger than the maximum size per checkpoint ({max_shard_size}) and is going to be "
f"split in {len(shards)} checkpoint shards. You can find where each parameters has been saved in the "
f"index located at {save_index_file}."
)
for shard_file, shard in shards.items():
# the shard item are unflattened, to save them we need to flatten them again
with open(os.path.join(save_directory, shard_file), mode="wb") as f:
params = unflatten_dict(shard, sep="/")
shard_bytes = to_bytes(params) | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
f.write(shard_bytes) | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
logger.info(f"Model weights saved in {output_model_file}")
if push_to_hub:
self._upload_modified_files(
save_directory,
repo_id,
files_timestamps,
commit_message=commit_message,
token=token,
)
@classmethod
def register_for_auto_class(cls, auto_class="FlaxAutoModel"):
"""
Register this class with a given auto class. This should only be used for custom models as the ones in the
library are already mapped with an auto class.
<Tip warning={true}>
This API is experimental and may have some slight breaking changes in the next releases.
</Tip>
Args:
auto_class (`str` or `type`, *optional*, defaults to `"FlaxAutoModel"`):
The auto class to register this new model with.
"""
if not isinstance(auto_class, str):
auto_class = auto_class.__name__ | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
import transformers.models.auto as auto_module
if not hasattr(auto_module, auto_class):
raise ValueError(f"{auto_class} is not a valid auto class.")
cls._auto_class = auto_class | 61 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/modeling_flax_utils.py |
class PaddingMode(ExplicitEnum):
"""
Enum class for the different padding modes to use when padding images.
"""
CONSTANT = "constant"
REFLECT = "reflect"
REPLICATE = "replicate"
SYMMETRIC = "symmetric" | 62 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/image_transforms.py |
class FusedRescaleNormalize:
"""
Rescale and normalize the input image in one step.
"""
def __init__(self, mean, std, rescale_factor: float = 1.0, inplace: bool = False):
self.mean = torch.tensor(mean) * (1.0 / rescale_factor)
self.std = torch.tensor(std) * (1.0 / rescale_factor)
self.inplace = inplace
def __call__(self, image: "torch.Tensor"):
image = _cast_tensor_to_float(image)
return F.normalize(image, self.mean, self.std, inplace=self.inplace) | 63 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/image_transforms.py |
class Rescale:
"""
Rescale the input image by rescale factor: image *= rescale_factor.
"""
def __init__(self, rescale_factor: float = 1.0):
self.rescale_factor = rescale_factor
def __call__(self, image: "torch.Tensor"):
image = image * self.rescale_factor
return image | 64 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/image_transforms.py |
class NumpyToTensor:
"""
Convert a numpy array to a PyTorch tensor.
"""
def __call__(self, image: np.ndarray):
# Same as in PyTorch, we assume incoming numpy images are in HWC format
# c.f. https://github.com/pytorch/vision/blob/61d97f41bc209e1407dcfbd685d2ee2da9c1cdad/torchvision/transforms/functional.py#L154
return torch.from_numpy(image.transpose(2, 0, 1)).contiguous() | 65 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/image_transforms.py |
class BatchFeature(UserDict):
r"""
Holds the output of the [`~SequenceFeatureExtractor.pad`] and feature extractor specific `__call__` methods.
This class is derived from a python dictionary and can be used as a dictionary.
Args:
data (`dict`, *optional*):
Dictionary of lists/arrays/tensors returned by the __call__/pad methods ('input_values', 'attention_mask',
etc.).
tensor_type (`Union[None, str, TensorType]`, *optional*):
You can give a tensor_type here to convert the lists of integers in PyTorch/TensorFlow/Numpy Tensors at
initialization.
"""
def __init__(self, data: Optional[Dict[str, Any]] = None, tensor_type: Union[None, str, TensorType] = None):
super().__init__(data)
self.convert_to_tensors(tensor_type=tensor_type) | 66 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
def __getitem__(self, item: str) -> Union[Any]:
"""
If the key is a string, returns the value of the dict associated to `key` ('input_values', 'attention_mask',
etc.).
"""
if isinstance(item, str):
return self.data[item]
else:
raise KeyError("Indexing with integers is not available when using Python based feature extractors")
def __getattr__(self, item: str):
try:
return self.data[item]
except KeyError:
raise AttributeError
def __getstate__(self):
return {"data": self.data}
def __setstate__(self, state):
if "data" in state:
self.data = state["data"]
# Copied from transformers.tokenization_utils_base.BatchEncoding.keys
def keys(self):
return self.data.keys()
# Copied from transformers.tokenization_utils_base.BatchEncoding.values
def values(self):
return self.data.values() | 66 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
# Copied from transformers.tokenization_utils_base.BatchEncoding.items
def items(self):
return self.data.items()
def _get_is_as_tensor_fns(self, tensor_type: Optional[Union[str, TensorType]] = None):
if tensor_type is None:
return None, None
# Convert to TensorType
if not isinstance(tensor_type, TensorType):
tensor_type = TensorType(tensor_type)
# Get a function reference for the correct framework
if tensor_type == TensorType.TENSORFLOW:
if not is_tf_available():
raise ImportError(
"Unable to convert output to TensorFlow tensors format, TensorFlow is not installed."
)
import tensorflow as tf | 66 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
as_tensor = tf.constant
is_tensor = tf.is_tensor
elif tensor_type == TensorType.PYTORCH:
if not is_torch_available():
raise ImportError("Unable to convert output to PyTorch tensors format, PyTorch is not installed.")
import torch # noqa
def as_tensor(value):
if isinstance(value, (list, tuple)) and len(value) > 0:
if isinstance(value[0], np.ndarray):
value = np.array(value)
elif (
isinstance(value[0], (list, tuple))
and len(value[0]) > 0
and isinstance(value[0][0], np.ndarray)
):
value = np.array(value)
if isinstance(value, np.ndarray):
return torch.from_numpy(value)
else:
return torch.tensor(value) | 66 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
is_tensor = torch.is_tensor
elif tensor_type == TensorType.JAX:
if not is_flax_available():
raise ImportError("Unable to convert output to JAX tensors format, JAX is not installed.")
import jax.numpy as jnp # noqa: F811
as_tensor = jnp.array
is_tensor = is_jax_tensor
else:
def as_tensor(value, dtype=None):
if isinstance(value, (list, tuple)) and isinstance(value[0], (list, tuple, np.ndarray)):
value_lens = [len(val) for val in value]
if len(set(value_lens)) > 1 and dtype is None:
# we have a ragged list so handle explicitly
value = as_tensor([np.asarray(val) for val in value], dtype=object)
return np.asarray(value, dtype=dtype)
is_tensor = is_numpy_array
return is_tensor, as_tensor | 66 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
def convert_to_tensors(self, tensor_type: Optional[Union[str, TensorType]] = None):
"""
Convert the inner content to tensors.
Args:
tensor_type (`str` or [`~utils.TensorType`], *optional*):
The type of tensors to use. If `str`, should be one of the values of the enum [`~utils.TensorType`]. If
`None`, no modification is done.
"""
if tensor_type is None:
return self
is_tensor, as_tensor = self._get_is_as_tensor_fns(tensor_type)
# Do the tensor conversion in batch
for key, value in self.items():
try:
if not is_tensor(value):
tensor = as_tensor(value) | 66 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
self[key] = tensor
except: # noqa E722
if key == "overflowing_values":
raise ValueError("Unable to create tensor returning overflowing values of different lengths. ")
raise ValueError(
"Unable to create tensor, you should probably activate padding "
"with 'padding=True' to have batched tensors with the same length."
)
return self
def to(self, *args, **kwargs) -> "BatchFeature":
"""
Send all values to device by calling `v.to(*args, **kwargs)` (PyTorch only). This should support casting in
different `dtypes` and sending the `BatchFeature` to a different `device`. | 66 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
Args:
args (`Tuple`):
Will be passed to the `to(...)` function of the tensors.
kwargs (`Dict`, *optional*):
Will be passed to the `to(...)` function of the tensors.
To enable asynchronous data transfer, set the `non_blocking` flag in `kwargs` (defaults to `False`).
Returns:
[`BatchFeature`]: The same instance after modification.
"""
requires_backends(self, ["torch"])
import torch # noqa | 66 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
new_data = {}
device = kwargs.get("device")
non_blocking = kwargs.get("non_blocking", False)
# Check if the args are a device or a dtype
if device is None and len(args) > 0:
# device should be always the first argument
arg = args[0]
if is_torch_dtype(arg):
# The first argument is a dtype
pass
elif isinstance(arg, str) or is_torch_device(arg) or isinstance(arg, int):
device = arg
else:
# it's something else
raise ValueError(f"Attempting to cast a BatchFeature to type {str(arg)}. This is not supported.")
# We cast only floating point tensors to avoid issues with tokenizers casting `LongTensor` to `FloatTensor`
for k, v in self.items():
# check if v is a floating point
if isinstance(v, torch.Tensor) and torch.is_floating_point(v):
# cast and send to device | 66 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
new_data[k] = v.to(*args, **kwargs)
elif isinstance(v, torch.Tensor) and device is not None:
new_data[k] = v.to(device=device, non_blocking=non_blocking)
else:
new_data[k] = v
self.data = new_data
return self | 66 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
class FeatureExtractionMixin(PushToHubMixin):
"""
This is a feature extraction mixin used to provide saving/loading functionality for sequential and image feature
extractors.
"""
_auto_class = None
def __init__(self, **kwargs):
"""Set elements of `kwargs` as attributes."""
# Pop "processor_class" as it should be saved as private attribute
self._processor_class = kwargs.pop("processor_class", None)
# Additional attributes without default values
for key, value in kwargs.items():
try:
setattr(self, key, value)
except AttributeError as err:
logger.error(f"Can't set {key} with value {value} for {self}")
raise err
def _set_processor_class(self, processor_class: str):
"""Sets processor class as an attribute."""
self._processor_class = processor_class | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
@classmethod
def from_pretrained(
cls,
pretrained_model_name_or_path: Union[str, os.PathLike],
cache_dir: Optional[Union[str, os.PathLike]] = None,
force_download: bool = False,
local_files_only: bool = False,
token: Optional[Union[str, bool]] = None,
revision: str = "main",
**kwargs,
):
r"""
Instantiate a type of [`~feature_extraction_utils.FeatureExtractionMixin`] from a feature extractor, *e.g.* a
derived class of [`SequenceFeatureExtractor`].
Args:
pretrained_model_name_or_path (`str` or `os.PathLike`):
This can be either: | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
- a string, the *model id* of a pretrained feature_extractor hosted inside a model repo on
huggingface.co.
- a path to a *directory* containing a feature extractor file saved using the
[`~feature_extraction_utils.FeatureExtractionMixin.save_pretrained`] method, e.g.,
`./my_model_directory/`.
- a path or url to a saved feature extractor JSON *file*, e.g.,
`./my_model_directory/preprocessor_config.json`.
cache_dir (`str` or `os.PathLike`, *optional*):
Path to a directory in which a downloaded pretrained model feature extractor should be cached if the
standard cache should not be used.
force_download (`bool`, *optional*, defaults to `False`):
Whether or not to force to (re-)download the feature extractor files and override the cached versions
if they exist.
resume_download: | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
Deprecated and ignored. All downloads are now resumed by default when possible.
Will be removed in v5 of Transformers.
proxies (`Dict[str, str]`, *optional*):
A dictionary of proxy servers to use by protocol or endpoint, e.g., `{'http': 'foo.bar:3128',
'http://hostname': 'foo.bar:4012'}.` The proxies are used on each request.
token (`str` or `bool`, *optional*):
The token to use as HTTP bearer authorization for remote files. If `True`, or not specified, will use
the token generated when running `huggingface-cli login` (stored in `~/.huggingface`).
revision (`str`, *optional*, defaults to `"main"`):
The specific model version to use. It can be a branch name, a tag name, or a commit id, since we use a
git-based system for storing models and other artifacts on huggingface.co, so `revision` can be any
identifier allowed by git. | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
<Tip>
To test a pull request you made on the Hub, you can pass `revision="refs/pr/<pr_number>"`.
</Tip> | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
return_unused_kwargs (`bool`, *optional*, defaults to `False`):
If `False`, then this function returns just the final feature extractor object. If `True`, then this
functions returns a `Tuple(feature_extractor, unused_kwargs)` where *unused_kwargs* is a dictionary
consisting of the key/value pairs whose keys are not feature extractor attributes: i.e., the part of
`kwargs` which has not been used to update `feature_extractor` and is otherwise ignored.
kwargs (`Dict[str, Any]`, *optional*):
The values in kwargs of any keys which are feature extractor attributes will be used to override the
loaded values. Behavior concerning key/value pairs whose keys are *not* feature extractor attributes is
controlled by the `return_unused_kwargs` keyword parameter.
Returns:
A feature extractor of type [`~feature_extraction_utils.FeatureExtractionMixin`]. | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
Examples: | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
```python
# We can't instantiate directly the base class *FeatureExtractionMixin* nor *SequenceFeatureExtractor* so let's show the examples on a
# derived class: *Wav2Vec2FeatureExtractor*
feature_extractor = Wav2Vec2FeatureExtractor.from_pretrained(
"facebook/wav2vec2-base-960h"
) # Download feature_extraction_config from huggingface.co and cache.
feature_extractor = Wav2Vec2FeatureExtractor.from_pretrained(
"./test/saved_model/"
) # E.g. feature_extractor (or model) was saved using *save_pretrained('./test/saved_model/')*
feature_extractor = Wav2Vec2FeatureExtractor.from_pretrained("./test/saved_model/preprocessor_config.json")
feature_extractor = Wav2Vec2FeatureExtractor.from_pretrained(
"facebook/wav2vec2-base-960h", return_attention_mask=False, foo=False
)
assert feature_extractor.return_attention_mask is False | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
feature_extractor, unused_kwargs = Wav2Vec2FeatureExtractor.from_pretrained(
"facebook/wav2vec2-base-960h", return_attention_mask=False, foo=False, return_unused_kwargs=True
)
assert feature_extractor.return_attention_mask is False
assert unused_kwargs == {"foo": False}
```"""
kwargs["cache_dir"] = cache_dir
kwargs["force_download"] = force_download
kwargs["local_files_only"] = local_files_only
kwargs["revision"] = revision | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
use_auth_token = kwargs.pop("use_auth_token", None)
if use_auth_token is not None:
warnings.warn(
"The `use_auth_token` argument is deprecated and will be removed in v5 of Transformers. Please use `token` instead.",
FutureWarning,
)
if token is not None:
raise ValueError(
"`token` and `use_auth_token` are both specified. Please set only the argument `token`."
)
token = use_auth_token
if token is not None:
kwargs["token"] = token
feature_extractor_dict, kwargs = cls.get_feature_extractor_dict(pretrained_model_name_or_path, **kwargs)
return cls.from_dict(feature_extractor_dict, **kwargs) | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
def save_pretrained(self, save_directory: Union[str, os.PathLike], push_to_hub: bool = False, **kwargs):
"""
Save a feature_extractor object to the directory `save_directory`, so that it can be re-loaded using the
[`~feature_extraction_utils.FeatureExtractionMixin.from_pretrained`] class method. | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
Args:
save_directory (`str` or `os.PathLike`):
Directory where the feature extractor JSON file will be saved (will be created if it does not exist).
push_to_hub (`bool`, *optional*, defaults to `False`):
Whether or not to push your model to the Hugging Face model hub after saving it. You can specify the
repository you want to push to with `repo_id` (will default to the name of `save_directory` in your
namespace).
kwargs (`Dict[str, Any]`, *optional*):
Additional key word arguments passed along to the [`~utils.PushToHubMixin.push_to_hub`] method.
"""
use_auth_token = kwargs.pop("use_auth_token", None) | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
if use_auth_token is not None:
warnings.warn(
"The `use_auth_token` argument is deprecated and will be removed in v5 of Transformers. Please use `token` instead.",
FutureWarning,
)
if kwargs.get("token", None) is not None:
raise ValueError(
"`token` and `use_auth_token` are both specified. Please set only the argument `token`."
)
kwargs["token"] = use_auth_token
if os.path.isfile(save_directory):
raise AssertionError(f"Provided path ({save_directory}) should be a directory, not a file")
os.makedirs(save_directory, exist_ok=True)
if push_to_hub:
commit_message = kwargs.pop("commit_message", None)
repo_id = kwargs.pop("repo_id", save_directory.split(os.path.sep)[-1])
repo_id = self._create_repo(repo_id, **kwargs)
files_timestamps = self._get_files_timestamps(save_directory) | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
# If we have a custom config, we copy the file defining it in the folder and set the attributes so it can be
# loaded from the Hub.
if self._auto_class is not None:
custom_object_save(self, save_directory, config=self)
# If we save using the predefined names, we can load using `from_pretrained`
output_feature_extractor_file = os.path.join(save_directory, FEATURE_EXTRACTOR_NAME)
self.to_json_file(output_feature_extractor_file)
logger.info(f"Feature extractor saved in {output_feature_extractor_file}")
if push_to_hub:
self._upload_modified_files(
save_directory,
repo_id,
files_timestamps,
commit_message=commit_message,
token=kwargs.get("token"),
)
return [output_feature_extractor_file] | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
@classmethod
def get_feature_extractor_dict(
cls, pretrained_model_name_or_path: Union[str, os.PathLike], **kwargs
) -> Tuple[Dict[str, Any], Dict[str, Any]]:
"""
From a `pretrained_model_name_or_path`, resolve to a dictionary of parameters, to be used for instantiating a
feature extractor of type [`~feature_extraction_utils.FeatureExtractionMixin`] using `from_dict`.
Parameters:
pretrained_model_name_or_path (`str` or `os.PathLike`):
The identifier of the pre-trained checkpoint from which we want the dictionary of parameters. | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
Returns:
`Tuple[Dict, Dict]`: The dictionary(ies) that will be used to instantiate the feature extractor object.
"""
cache_dir = kwargs.pop("cache_dir", None)
force_download = kwargs.pop("force_download", False)
resume_download = kwargs.pop("resume_download", None)
proxies = kwargs.pop("proxies", None)
subfolder = kwargs.pop("subfolder", None)
token = kwargs.pop("token", None)
use_auth_token = kwargs.pop("use_auth_token", None)
local_files_only = kwargs.pop("local_files_only", False)
revision = kwargs.pop("revision", None) | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
if use_auth_token is not None:
warnings.warn(
"The `use_auth_token` argument is deprecated and will be removed in v5 of Transformers. Please use `token` instead.",
FutureWarning,
)
if token is not None:
raise ValueError(
"`token` and `use_auth_token` are both specified. Please set only the argument `token`."
)
token = use_auth_token
from_pipeline = kwargs.pop("_from_pipeline", None)
from_auto_class = kwargs.pop("_from_auto", False)
user_agent = {"file_type": "feature extractor", "from_auto_class": from_auto_class}
if from_pipeline is not None:
user_agent["using_pipeline"] = from_pipeline
if is_offline_mode() and not local_files_only:
logger.info("Offline mode: forcing local_files_only=True")
local_files_only = True | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
pretrained_model_name_or_path = str(pretrained_model_name_or_path)
is_local = os.path.isdir(pretrained_model_name_or_path)
if os.path.isdir(pretrained_model_name_or_path):
feature_extractor_file = os.path.join(pretrained_model_name_or_path, FEATURE_EXTRACTOR_NAME)
if os.path.isfile(pretrained_model_name_or_path):
resolved_feature_extractor_file = pretrained_model_name_or_path
is_local = True
elif is_remote_url(pretrained_model_name_or_path):
feature_extractor_file = pretrained_model_name_or_path
resolved_feature_extractor_file = download_url(pretrained_model_name_or_path)
else:
feature_extractor_file = FEATURE_EXTRACTOR_NAME
try:
# Load from local folder or from cache or download from model Hub and cache
resolved_feature_extractor_file = cached_file(
pretrained_model_name_or_path,
feature_extractor_file, | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
cache_dir=cache_dir,
force_download=force_download,
proxies=proxies,
resume_download=resume_download,
local_files_only=local_files_only,
subfolder=subfolder,
token=token,
user_agent=user_agent,
revision=revision,
)
except EnvironmentError:
# Raise any environment error raise by `cached_file`. It will have a helpful error message adapted to
# the original exception.
raise
except Exception:
# For any other exception, we throw a generic error.
raise EnvironmentError(
f"Can't load feature extractor for '{pretrained_model_name_or_path}'. If you were trying to load"
" it from 'https://huggingface.co/models', make sure you don't have a local directory with the" | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
f" same name. Otherwise, make sure '{pretrained_model_name_or_path}' is the correct path to a"
f" directory containing a {FEATURE_EXTRACTOR_NAME} file"
) | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
try:
# Load feature_extractor dict
with open(resolved_feature_extractor_file, "r", encoding="utf-8") as reader:
text = reader.read()
feature_extractor_dict = json.loads(text)
except json.JSONDecodeError:
raise EnvironmentError(
f"It looks like the config file at '{resolved_feature_extractor_file}' is not a valid JSON file."
)
if is_local:
logger.info(f"loading configuration file {resolved_feature_extractor_file}")
else:
logger.info(
f"loading configuration file {feature_extractor_file} from cache at {resolved_feature_extractor_file}"
) | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
if not is_local:
if "auto_map" in feature_extractor_dict:
feature_extractor_dict["auto_map"] = add_model_info_to_auto_map(
feature_extractor_dict["auto_map"], pretrained_model_name_or_path
)
if "custom_pipelines" in feature_extractor_dict:
feature_extractor_dict["custom_pipelines"] = add_model_info_to_custom_pipelines(
feature_extractor_dict["custom_pipelines"], pretrained_model_name_or_path
)
return feature_extractor_dict, kwargs
@classmethod
def from_dict(cls, feature_extractor_dict: Dict[str, Any], **kwargs) -> PreTrainedFeatureExtractor:
"""
Instantiates a type of [`~feature_extraction_utils.FeatureExtractionMixin`] from a Python dictionary of
parameters. | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
Args:
feature_extractor_dict (`Dict[str, Any]`):
Dictionary that will be used to instantiate the feature extractor object. Such a dictionary can be
retrieved from a pretrained checkpoint by leveraging the
[`~feature_extraction_utils.FeatureExtractionMixin.to_dict`] method.
kwargs (`Dict[str, Any]`):
Additional parameters from which to initialize the feature extractor object.
Returns:
[`~feature_extraction_utils.FeatureExtractionMixin`]: The feature extractor object instantiated from those
parameters.
"""
return_unused_kwargs = kwargs.pop("return_unused_kwargs", False) | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
# Update feature_extractor with kwargs if needed
to_remove = []
for key, value in kwargs.items():
if key in feature_extractor_dict:
feature_extractor_dict[key] = value
to_remove.append(key)
for key in to_remove:
kwargs.pop(key, None)
feature_extractor = cls(**feature_extractor_dict)
logger.info(f"Feature extractor {feature_extractor}")
if return_unused_kwargs:
return feature_extractor, kwargs
else:
return feature_extractor | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
def to_dict(self) -> Dict[str, Any]:
"""
Serializes this instance to a Python dictionary. Returns:
`Dict[str, Any]`: Dictionary of all the attributes that make up this configuration instance.
"""
output = copy.deepcopy(self.__dict__)
output["feature_extractor_type"] = self.__class__.__name__
if "mel_filters" in output:
del output["mel_filters"]
if "window" in output:
del output["window"]
return output
@classmethod
def from_json_file(cls, json_file: Union[str, os.PathLike]) -> PreTrainedFeatureExtractor:
"""
Instantiates a feature extractor of type [`~feature_extraction_utils.FeatureExtractionMixin`] from the path to
a JSON file of parameters.
Args:
json_file (`str` or `os.PathLike`):
Path to the JSON file containing the parameters. | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
Returns:
A feature extractor of type [`~feature_extraction_utils.FeatureExtractionMixin`]: The feature_extractor
object instantiated from that JSON file.
"""
with open(json_file, "r", encoding="utf-8") as reader:
text = reader.read()
feature_extractor_dict = json.loads(text)
return cls(**feature_extractor_dict)
def to_json_string(self) -> str:
"""
Serializes this instance to a JSON string.
Returns:
`str`: String containing all the attributes that make up this feature_extractor instance in JSON format.
"""
dictionary = self.to_dict()
for key, value in dictionary.items():
if isinstance(value, np.ndarray):
dictionary[key] = value.tolist() | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
# make sure private name "_processor_class" is correctly
# saved as "processor_class"
_processor_class = dictionary.pop("_processor_class", None)
if _processor_class is not None:
dictionary["processor_class"] = _processor_class
return json.dumps(dictionary, indent=2, sort_keys=True) + "\n"
def to_json_file(self, json_file_path: Union[str, os.PathLike]):
"""
Save this instance to a JSON file.
Args:
json_file_path (`str` or `os.PathLike`):
Path to the JSON file in which this feature_extractor instance's parameters will be saved.
"""
with open(json_file_path, "w", encoding="utf-8") as writer:
writer.write(self.to_json_string())
def __repr__(self):
return f"{self.__class__.__name__} {self.to_json_string()}" | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
@classmethod
def register_for_auto_class(cls, auto_class="AutoFeatureExtractor"):
"""
Register this class with a given auto class. This should only be used for custom feature extractors as the ones
in the library are already mapped with `AutoFeatureExtractor`.
<Tip warning={true}>
This API is experimental and may have some slight breaking changes in the next releases.
</Tip>
Args:
auto_class (`str` or `type`, *optional*, defaults to `"AutoFeatureExtractor"`):
The auto class to register this new feature extractor with.
"""
if not isinstance(auto_class, str):
auto_class = auto_class.__name__
import transformers.models.auto as auto_module
if not hasattr(auto_module, auto_class):
raise ValueError(f"{auto_class} is not a valid auto class.")
cls._auto_class = auto_class | 67 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/feature_extraction_utils.py |
class AddedToken:
"""
AddedToken represents a token to be added to a Tokenizer An AddedToken can have special options defining the
way it should behave.
The `normalized` will default to `not special` if it is not specified, similarly to the definition in
`tokenizers`.
"""
def __init__(
self, content: str, single_word=False, lstrip=False, rstrip=False, special=False, normalized=None
):
self.content = content
self.single_word = single_word
self.lstrip = lstrip
self.rstrip = rstrip
self.special = special
self.normalized = normalized if normalized is not None else not special
def __getstate__(self):
return self.__dict__
def __str__(self):
return self.content | 68 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
class EncodingFast:
"""This is dummy class because without the `tokenizers` library we don't have these objects anyway"""
pass | 69 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
class TruncationStrategy(ExplicitEnum):
"""
Possible values for the `truncation` argument in [`PreTrainedTokenizerBase.__call__`]. Useful for tab-completion in
an IDE.
"""
ONLY_FIRST = "only_first"
ONLY_SECOND = "only_second"
LONGEST_FIRST = "longest_first"
DO_NOT_TRUNCATE = "do_not_truncate" | 70 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
class CharSpan(NamedTuple):
"""
Character span in the original string.
Args:
start (`int`): Index of the first character in the original string.
end (`int`): Index of the character following the last character in the original string.
"""
start: int
end: int | 71 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
class TokenSpan(NamedTuple):
"""
Token span in an encoded string (list of tokens).
Args:
start (`int`): Index of the first token in the span.
end (`int`): Index of the token following the last token in the span.
"""
start: int
end: int | 72 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
class BatchEncoding(UserDict):
"""
Holds the output of the [`~tokenization_utils_base.PreTrainedTokenizerBase.__call__`],
[`~tokenization_utils_base.PreTrainedTokenizerBase.encode_plus`] and
[`~tokenization_utils_base.PreTrainedTokenizerBase.batch_encode_plus`] methods (tokens, attention_masks, etc).
This class is derived from a python dictionary and can be used as a dictionary. In addition, this class exposes
utility methods to map from word/character space to token space. | 73 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
Args:
data (`dict`, *optional*):
Dictionary of lists/arrays/tensors returned by the `__call__`/`encode_plus`/`batch_encode_plus` methods
('input_ids', 'attention_mask', etc.).
encoding (`tokenizers.Encoding` or `Sequence[tokenizers.Encoding]`, *optional*):
If the tokenizer is a fast tokenizer which outputs additional information like mapping from word/character
space to token space the `tokenizers.Encoding` instance or list of instance (for batches) hold this
information.
tensor_type (`Union[None, str, TensorType]`, *optional*):
You can give a tensor_type here to convert the lists of integers in PyTorch/TensorFlow/Numpy Tensors at
initialization.
prepend_batch_axis (`bool`, *optional*, defaults to `False`):
Whether or not to add a batch axis when converting to tensors (see `tensor_type` above). Note that this | 73 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
parameter has an effect if the parameter `tensor_type` is set, *otherwise has no effect*.
n_sequences (`Optional[int]`, *optional*):
You can give a tensor_type here to convert the lists of integers in PyTorch/TensorFlow/Numpy Tensors at
initialization.
""" | 73 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
def __init__(
self,
data: Optional[Dict[str, Any]] = None,
encoding: Optional[Union[EncodingFast, Sequence[EncodingFast]]] = None,
tensor_type: Union[None, str, TensorType] = None,
prepend_batch_axis: bool = False,
n_sequences: Optional[int] = None,
):
super().__init__(data)
if isinstance(encoding, EncodingFast):
encoding = [encoding]
self._encodings = encoding
if n_sequences is None and encoding is not None and len(encoding):
n_sequences = encoding[0].n_sequences
self._n_sequences = n_sequences
self.convert_to_tensors(tensor_type=tensor_type, prepend_batch_axis=prepend_batch_axis) | 73 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
@property
def n_sequences(self) -> Optional[int]:
"""
`Optional[int]`: The number of sequences used to generate each sample from the batch encoded in this
[`BatchEncoding`]. Currently can be one of `None` (unknown), `1` (a single sentence) or `2` (a pair of
sentences)
"""
return self._n_sequences
@property
def is_fast(self) -> bool:
"""
`bool`: Indicate whether this [`BatchEncoding`] was generated from the result of a [`PreTrainedTokenizerFast`]
or not.
"""
return self._encodings is not None
def __getitem__(self, item: Union[int, str]) -> Union[Any, EncodingFast]:
"""
If the key is a string, returns the value of the dict associated to `key` ('input_ids', 'attention_mask',
etc.).
If the key is an integer, get the `tokenizers.Encoding` for batch item with index `key`. | 73 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
If the key is a slice, returns the value of the dict associated to `key` ('input_ids', 'attention_mask', etc.)
with the constraint of slice.
"""
if isinstance(item, str):
return self.data[item]
elif self._encodings is not None:
return self._encodings[item]
elif isinstance(item, slice):
return {key: self.data[key][item] for key in self.data.keys()}
else:
raise KeyError(
"Invalid key. Only three types of key are available: "
"(1) string, (2) integers for backend Encoding, and (3) slices for data subsetting."
)
def __getattr__(self, item: str):
try:
return self.data[item]
except KeyError:
raise AttributeError
def __getstate__(self):
return {"data": self.data, "encodings": self._encodings}
def __setstate__(self, state):
if "data" in state:
self.data = state["data"] | 73 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
if "encodings" in state:
self._encodings = state["encodings"]
def keys(self):
return self.data.keys()
def values(self):
return self.data.values()
def items(self):
return self.data.items()
# After this point:
# Extended properties and methods only available for fast (Rust-based) tokenizers
# provided by HuggingFace tokenizers library.
@property
def encodings(self) -> Optional[List[EncodingFast]]:
"""
`Optional[List[tokenizers.Encoding]]`: The list all encodings from the tokenization process. Returns `None` if
the input was tokenized through Python (i.e., not a fast) tokenizer.
"""
return self._encodings
def tokens(self, batch_index: int = 0) -> List[str]:
"""
Return the list of tokens (sub-parts of the input strings after word/subword splitting and before conversion to
integer indices) at a given batch index (only works for the output of a fast tokenizer). | 73 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
Args:
batch_index (`int`, *optional*, defaults to 0): The index to access in the batch.
Returns:
`List[str]`: The list of tokens at that index.
"""
if not self._encodings:
raise ValueError(
"tokens() is not available when using non-fast tokenizers (e.g. instance of a `XxxTokenizerFast`"
" class)."
)
return self._encodings[batch_index].tokens
def sequence_ids(self, batch_index: int = 0) -> List[Optional[int]]:
"""
Return a list mapping the tokens to the id of their original sentences:
- `None` for special tokens added around or between sequences,
- `0` for tokens corresponding to words in the first sequence,
- `1` for tokens corresponding to words in the second sequence when a pair of sequences was jointly
encoded. | 73 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
Args:
batch_index (`int`, *optional*, defaults to 0): The index to access in the batch.
Returns:
`List[Optional[int]]`: A list indicating the sequence id corresponding to each token. Special tokens added
by the tokenizer are mapped to `None` and other tokens are mapped to the index of their corresponding
sequence.
"""
if not self._encodings:
raise ValueError(
"sequence_ids() is not available when using non-fast tokenizers (e.g. instance of a `XxxTokenizerFast`"
" class)."
)
return self._encodings[batch_index].sequence_ids
def words(self, batch_index: int = 0) -> List[Optional[int]]:
"""
Return a list mapping the tokens to their actual word in the initial sentence for a fast tokenizer.
Args:
batch_index (`int`, *optional*, defaults to 0): The index to access in the batch. | 73 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
Returns:
`List[Optional[int]]`: A list indicating the word corresponding to each token. Special tokens added by the
tokenizer are mapped to `None` and other tokens are mapped to the index of their corresponding word
(several tokens will be mapped to the same word index if they are parts of that word).
"""
if not self._encodings:
raise ValueError(
"words() is not available when using non-fast tokenizers (e.g. instance of a `XxxTokenizerFast`"
" class)."
)
warnings.warn(
"`BatchEncoding.words()` property is deprecated and should be replaced with the identical, "
"but more self-explanatory `BatchEncoding.word_ids()` property.",
FutureWarning,
)
return self.word_ids(batch_index) | 73 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
def word_ids(self, batch_index: int = 0) -> List[Optional[int]]:
"""
Return a list mapping the tokens to their actual word in the initial sentence for a fast tokenizer.
Args:
batch_index (`int`, *optional*, defaults to 0): The index to access in the batch.
Returns:
`List[Optional[int]]`: A list indicating the word corresponding to each token. Special tokens added by the
tokenizer are mapped to `None` and other tokens are mapped to the index of their corresponding word
(several tokens will be mapped to the same word index if they are parts of that word).
"""
if not self._encodings:
raise ValueError(
"word_ids() is not available when using non-fast tokenizers (e.g. instance of a `XxxTokenizerFast`"
" class)."
)
return self._encodings[batch_index].word_ids | 73 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
def token_to_sequence(self, batch_or_token_index: int, token_index: Optional[int] = None) -> int:
"""
Get the index of the sequence represented by the given token. In the general use case, this method returns `0`
for a single sequence or the first sequence of a pair, and `1` for the second sequence of a pair
Can be called as:
- `self.token_to_sequence(token_index)` if batch size is 1
- `self.token_to_sequence(batch_index, token_index)` if batch size is greater than 1
This method is particularly suited when the input sequences are provided as pre-tokenized sequences (i.e.,
words are defined by the user). In this case it allows to easily associate encoded tokens with provided
tokenized words. | 73 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
Args:
batch_or_token_index (`int`):
Index of the sequence in the batch. If the batch only comprises one sequence, this can be the index of
the token in the sequence.
token_index (`int`, *optional*):
If a batch index is provided in *batch_or_token_index*, this can be the index of the token in the
sequence.
Returns:
`int`: Index of the word in the input sequence.
""" | 73 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
if not self._encodings:
raise ValueError("token_to_sequence() is not available when using Python based tokenizers")
if token_index is not None:
batch_index = batch_or_token_index
else:
batch_index = 0
token_index = batch_or_token_index
if batch_index < 0:
batch_index = self._batch_size + batch_index
if token_index < 0:
token_index = self._seq_len + token_index
return self._encodings[batch_index].token_to_sequence(token_index)
def token_to_word(self, batch_or_token_index: int, token_index: Optional[int] = None) -> int:
"""
Get the index of the word corresponding (i.e. comprising) to an encoded token in a sequence of the batch.
Can be called as:
- `self.token_to_word(token_index)` if batch size is 1
- `self.token_to_word(batch_index, token_index)` if batch size is greater than 1 | 73 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
This method is particularly suited when the input sequences are provided as pre-tokenized sequences (i.e.,
words are defined by the user). In this case it allows to easily associate encoded tokens with provided
tokenized words.
Args:
batch_or_token_index (`int`):
Index of the sequence in the batch. If the batch only comprise one sequence, this can be the index of
the token in the sequence.
token_index (`int`, *optional*):
If a batch index is provided in *batch_or_token_index*, this can be the index of the token in the
sequence.
Returns:
`int`: Index of the word in the input sequence.
""" | 73 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
if not self._encodings:
raise ValueError("token_to_word() is not available when using Python based tokenizers")
if token_index is not None:
batch_index = batch_or_token_index
else:
batch_index = 0
token_index = batch_or_token_index
if batch_index < 0:
batch_index = self._batch_size + batch_index
if token_index < 0:
token_index = self._seq_len + token_index
return self._encodings[batch_index].token_to_word(token_index)
def word_to_tokens(
self, batch_or_word_index: int, word_index: Optional[int] = None, sequence_index: int = 0
) -> Optional[TokenSpan]:
"""
Get the encoded token span corresponding to a word in a sequence of the batch.
Token spans are returned as a [`~tokenization_utils_base.TokenSpan`] with:
- **start** -- Index of the first token.
- **end** -- Index of the token following the last token.
Can be called as: | 73 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
- `self.word_to_tokens(word_index, sequence_index: int = 0)` if batch size is 1
- `self.word_to_tokens(batch_index, word_index, sequence_index: int = 0)` if batch size is greater or equal to
1
This method is particularly suited when the input sequences are provided as pre-tokenized sequences (i.e. words
are defined by the user). In this case it allows to easily associate encoded tokens with provided tokenized
words. | 73 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
Args:
batch_or_word_index (`int`):
Index of the sequence in the batch. If the batch only comprises one sequence, this can be the index of
the word in the sequence.
word_index (`int`, *optional*):
If a batch index is provided in *batch_or_token_index*, this can be the index of the word in the
sequence.
sequence_index (`int`, *optional*, defaults to 0):
If pair of sequences are encoded in the batch this can be used to specify which sequence in the pair (0
or 1) the provided word index belongs to. | 73 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
Returns:
([`~tokenization_utils_base.TokenSpan`], *optional*): Span of tokens in the encoded sequence. Returns
`None` if no tokens correspond to the word. This can happen especially when the token is a special token
that has been used to format the tokenization. For example when we add a class token at the very beginning
of the tokenization.
""" | 73 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
if not self._encodings:
raise ValueError("word_to_tokens() is not available when using Python based tokenizers")
if word_index is not None:
batch_index = batch_or_word_index
else:
batch_index = 0
word_index = batch_or_word_index
if batch_index < 0:
batch_index = self._batch_size + batch_index
if word_index < 0:
word_index = self._seq_len + word_index
span = self._encodings[batch_index].word_to_tokens(word_index, sequence_index)
return TokenSpan(*span) if span is not None else None
def token_to_chars(self, batch_or_token_index: int, token_index: Optional[int] = None) -> CharSpan:
"""
Get the character span corresponding to an encoded token in a sequence of the batch.
Character spans are returned as a [`~tokenization_utils_base.CharSpan`] with: | 73 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
- **start** -- Index of the first character in the original string associated to the token.
- **end** -- Index of the character following the last character in the original string associated to the
token.
Can be called as:
- `self.token_to_chars(token_index)` if batch size is 1
- `self.token_to_chars(batch_index, token_index)` if batch size is greater or equal to 1
Args:
batch_or_token_index (`int`):
Index of the sequence in the batch. If the batch only comprise one sequence, this can be the index of
the token in the sequence.
token_index (`int`, *optional*):
If a batch index is provided in *batch_or_token_index*, this can be the index of the token or tokens in
the sequence. | 73 | /Users/nielsrogge/Documents/python_projecten/transformers/src/transformers/tokenization_utils_base.py |
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