python - How to find characters not in parentheses -


attempting find occurrences of characters 

string1 = '%(example_1).40s-%(example-2)_-%(example3)s_'

so output has occurrences of '-' '_' not in parentheses

['-', '_', '-', '_']

do not need care nested parentheses

the following give output.:

>>> import re >>> str = '%(example_1).40s-%(example-2)_-%(example3)s_' >>> print list("".join(re.findall("[-_]+(?![^(]*\))", str))) ['-', '_', '-', '_']

what finds substrings containing '-' and/or '_' in str , not in parentheses. since these substrings, such matching characters joining, , splitting list.


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