dataset.py has been cleaned up to follow PEP8 style.
dataset.py has been cleaned up to follow PEP8 style.

apache/climate,agoodm/climate,huikyole/climate,apache/climate,huikyole/climate,jarifibrahim/climate,lewismc/climate,agoodm/climate,agoodm/climate,huikyole/climate,Omkar20895/climate,jarifibrahim/climate,Omkar20895/climate,apache/climate,lewismc/climate,jarifibrahim/climate,apache/climate,jarifibrahim/climate,lewismc/climate,jarifibrahim/climate,lewismc/climate,agoodm/climate,huikyole/climate,agoodm/climate,Omkar20895/climate,apache/climate,Omkar20895/climate,huikyole/climate,Omkar20895/climate,lewismc/climate