What do people think about black? I'm asking because one of my personal preferences is to use spaces for clarity: 1. right = mystr[ start : ] black version right=mystr[start:] 2. mtime = time.asctime( time.localtime( info.st_mtime ) ) black version mtime = time.asctime(time.localtime(info.st_mtime)) Is there a reason why PEP8 doesn't like these spaces?