New submission from Anthony Sottile <asott...@umich.edu>:
We recently found a bug in one of our codebases that looked ~roughly like this:
class C:
...
def __hash__(self):
return hash((v for k, v in sorted(self.__dict__.items())))
which resulted in a production bug
The *intention* was to hash a tuple of those elements but the author had
forgotten the `tuple(...)` call (or incorrectly assumed a parenthesized
generator was a tuple comprehension) -- either way it seems wrong that
generators are currently hashable as they are mutable
Thoughts on `__hash__ = None` for generators?
----------
components: Interpreter Core
messages: 356382
nosy: Anthony Sottile
priority: normal
severity: normal
status: open
title: generators are currently hashable
versions: Python 3.9
_______________________________________
Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue38769>
_______________________________________
_______________________________________________
Python-bugs-list mailing list
Unsubscribe:
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
