logging module collision
Logging module collides with the Python one:
import pytorch_lightning as pl
dir(pl.logging)
It gives you the python logging module attributes instead of the pytorch_lightning ones.
This is probably due to this 
  
    
      pytorch-lightning/pytorch_lightning/__init__.py
    
    
         Line 31
      in
      deffbab
    
  
  
    

        
          
           import logging 
        
    
  


Maybe you should rename the logging module to something else such as logger?