I agree with @NelleV on this - its not your responsibility to PEP8 this file, but ideally any new code should, within reason, be as PEP8 as possible. My take on this example is that there should be spaces after the commas (PEP8 quote: ```Avoid extraneous whitespace in the following situations: 
Immediately before a comma, semicolon, or colon``` - there is no explicit mention of whitespace *after* the comma, but generally that is the accepted form).