Serhiy Storchaka added the comment:
This is because grp.struct_group contains unhashable component (a list).
Same behavior with tuple:
>>> tuple(grp.getgrgid(1000))
('serhiy', 'x', 1000, [])
>>> set(tuple(grp.getgrgid(1000)))
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: unhashable type: 'list'
>>> set([tuple(grp.getgrgid(1000))])
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: unhashable type: 'list'
Instead a set of grp.struct_group, create a dict, which maps group name to
grp.struct_group.
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nosy: +serhiy.storchaka
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue22513>
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