[issue18149] filecmp.cmp() incorrect results when previously compared file is modified within modification time resolution

[Mark Levitt]

Mark Levitt added the comment:

I've added a "clear_cache()" method to filecmp.py. Patch attached. 

I had thought about implementing an optional parameter to only invalidate the cache of a specific file object, but figured I'd keep it simple for now.

First time submitting a patch, so apologies if I've done something the wrong way.

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keywords: +patch
nosy: +melevittfl
Added file: http://bugs.python.org/file30557/18149.patch

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