RE Despair - help required

[Yoav]

I am trying the following:

re.search(r'\\[^"\\]+(?=("?$))', "c:\ret_files")

and I get a return of NoneType, and I have no idea why. I know that I 
missing something here, but I really can't figure out why (I bet it's 
something obvious). I also tried this RE on KODOS and it works fine 
there, so I am really puzzled.

Any ideas?


Thanks.