Certainly! Here's a Python code block with the outlined steps for implementing Colossal Ai distributed training:

```python
# Step 1: Install the Colossal Ai library
# Run the following command in your terminal: 
pip install colossal-ai

# Step 2: Import the Colossal Ai library in your training script
import colossalai

# Step 3: Initialize Colossal Ai engine and trainer
engine = colossalai.Engine()
trainer = colossalai.Trainer(engine=engine)

# Step 4: Replace PyTorch's DataParallel with Colossal Ai's DistributedDataParallel
trainer.model = colossalai.nn.DistributedDataParallel(trainer.model)

# Step 5: Start distributed training
# Invoke the script using the distributed launcher provided by PyTorch:
# Replace <num_gpus> with the number of GPUs available on your machine
# Run the following command in your terminal:
torch.distributed.launch --nproc_per_node=<num_gpus> train.py
```
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