Raymond Hettinger <rhettin...@users.sourceforge.net> added the comment:
The choice between ValueError and TypeError can sometimes be ambiguous and seem
arbitrary and I understand why you're gravitating towards ValueError (because
it works some values and not others), but in this case the API is already fixed
by what hash() does elsewhere.
It is no fair to users to have to wrap hash(x) calls with a try/except that
catches both exceptions. So, we should still to a consistent hash API:
>>> hash([])
Traceback (most recent call last):
File "<pyshell#1>", line 1, in <module>
hash([])
TypeError: unhashable type: 'list'
In this case, practicality beats purity and released beats unreleased.
----------
status: closed -> open
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue10356>
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