[issue17447] str.identifier shouldn't accept Python keywords

[Florent Xicluna]

Florent Xicluna added the comment:

According to the documentation, the reserved words are classified as identifiers:
http://docs.python.org/3/reference/lexical_analysis.html#keywords

There's an easy workaround:

>>> from keyword import iskeyword
>>> def is_valid_identifier(s):
...     return s.isidentifier() and not iskeyword(s)
... 
>>> is_valid_identifier('def')
False

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nosy: +flox

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<http://bugs.python.org/issue17447>
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