Ezio Melotti <[email protected]> added the comment:
Changing the name of the flag is fine with me.
Having a warning for unescaped brackets that trigger set operations might also
be a solution (once escaped they will still work on the old re). Maybe the
same could also be done for scoped flags.
FWIW I tried to come up with a simpler regex that makes some sense and triggers
unwanted set operations and I didn't come up with anything except:
>>> regex.findall('[[(]foo[)]]', '[[foo] (foo)]')
['f', 'o', 'o', '(', 'f', 'o', 'o', ')']
>>> re.findall('[[(]foo[)]]', '[[foo] (foo)]')
['(foo)]']
(but this doesn't make too much sense). Complex regex will still break though,
so the issue needs to be addressed somehow.
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<http://bugs.python.org/issue2636>
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