[issue10021] Format parser is too permissive
Terry J. Reedy
report at bugs.python.org
Sat Oct 9 00:55:20 CEST 2010
Terry J. Reedy <tjreedy at udel.edu> added the comment:
This is a bug report in that there is a discrepancy between the grammar in the doc and the behavior. Laxiness can lead to portability problems if CPython is lax compared to a normal reading of the spec and another implementation takes the spec seriously.
I agree that implementation details that lead to an exception here and not there, or vice versa, are best avoided.
For getattr:
'''
getattr(object, name[, default])
Return the value of the named attributed of object. name must be a string.
'''
the doc is careful to just say that name must be a string, not specifically an identifier. Given that, I suppose
"attribute_name ::= identifier" should be changed to match so that string formats can always (all implementations) also access non-identifier attributes.
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nosy: +terry.reedy
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