Custom Checkpoint file extension
🚀 Feature
Atm, we have hardcoded .ckpt as a file extension for any checkpoint.

  
    
      pytorch-lightning/pytorch_lightning/callbacks/model_checkpoint.py
    
    
         Line 429
      in
      db69d16
    
  
  
    

        
          
           ckpt_name = f"{filename}.ckpt" 
        
    
  


Proposed solution 1:
class ModelCheckpoint(Callback):
    FILE_EXTENSION = ".ckpt"

Proposed solution 2:
ModelCheckpoint(ext=''pt')