Vedran Čačić added the comment:
I agree that namedtuples having __dict__ is probably more trouble than benefit.
But in my view, that's no reason for _asdict to not work correctly. The whole
point of separate function (even going through the pain of underscore-starting
public API, since everything else is even bigger pain) is that we sidestep the
question of vars() and other standard Python hooks, and provide our way of
extracting a namedtuple's namespace, for ones who need it.
Of course, the fix/workaround is trivial, as Raymond says: just
def _asdict(self):
return collections.OrderedDict(zip(self._fields, self))
That way, it doesn't matter whether self has a `__dict__` or not.
If you think it shouldn't be done, the documentation really needs to be
changed. Current wording is very misleading, showing that `_asdict` works on a
class having `__slots__ = ()`, but containing no explanation of that attribute
being _necessary_ for `_asdict` to work. (It just says "This helps keep memory
requirements low by preventing the creation of instance dictionaries.")
----------
nosy: +Vedran.Čačić
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<http://bugs.python.org/issue24931>
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