from torchvision import models
model = models.resnet18(pretrained = True)
mean = [0.485,0.456,0.406]
std = [0.229,0.224,0.225]
for parms in model.parameters():
    parms.requires_grad = False
model.fc = torch.nn.Linear(512,8)
optimzer = torch.optim.Adam([parms for parmas in model.parameters() if (parms.requires_grad == True)],lr = 0.05 )


This code is giving me error like this  I don’t understand where is mistake.
ValueError                                Traceback (most recent call last)
<ipython-input-18-c701a2bba695> in <module>
      6     parms.requires_grad = False
      7 model.fc = torch.nn.Linear(512,8)
----> 8 optimzer = torch.optim.Adam([parms for parmas in model.parameters() if (parms.requires_grad == True)],lr = 0.05 )

C:\Miniconda\envs\py37_pytorch\lib\site-packages\torch\optim\adam.py in __init__(self, params, lr, betas, eps, weight_decay, amsgrad)
     42         defaults = dict(lr=lr, betas=betas, eps=eps,
     43                         weight_decay=weight_decay, amsgrad=amsgrad)
---> 44         super(Adam, self).__init__(params, defaults)
     45 
     46     def __setstate__(self, state):

C:\Miniconda\envs\py37_pytorch\lib\site-packages\torch\optim\optimizer.py in __init__(self, params, defaults)
     44         param_groups = list(params)
     45         if len(param_groups) == 0:
---> 46             raise ValueError("optimizer got an empty parameter list")
     47         if not isinstance(param_groups[0], dict):
     48             param_groups = [{'params': param_groups}]

ValueError: optimizer got an empty parameter list