Fred> Guido van Rossum writes:
>> Agreed, but you're still using two levels of quoting, and with
>> anything less, "foo.bar" will also match a module named "foolbar".
Fred> Agreed. "foo\.bar" will match "foolbar" as well, but 'foo\.bar'
Fred> only matches "foo.bar".
Coming back to my original question, does it make sense to allow regular
expressions in the message and module fields in a -W command line arg? The
complexity of all the shell/re quoting suggests not, but having -W args
treated differently than the args to filterwarnings() doesn't seem right.
Perhaps this is something that never happens in practice. I've never used
-W. Are there people out there who have used it and wished the message and
module fields could be regular expressions? Conversely, does anyone make
use of the fact that the message and module args to filterwarnings() can be
regular expressions?
Looking through the Python source I see several examples of filterwarning()
where one or the other of the message and module args are regular
expressions, so that answers the second question. The first remains open.
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