03.06.17 03:31, Guido van Rossum пише:
OK, I think this discussion is pretty much dead then. We definitely shouldn't allow math operators in identifiers, otherwise in Python 4 or 5 we couldn't introduce them as operators.
Sorry. I proposed this idea as a joke. math.π is useless, but mostly harmless. But I don't want to change Python grammar.
The rule for Python identifiers already is not easy, there is no simple regular expression for them, and I'm sure most tools proceeding Python sources (even the tokenize module and IDLE) do not handle all Python identifier correctly. For example they don't recognize the symbol ℘ (U+2118, SCRIPT CAPITAL P) as a valid identifier.
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