Raymond Hettinger <[email protected]> added the comment:
Discussed this with GvR.
Here's a recap:
For 2.6 and 3.1 which are already released, check for the _fields attribute.
This is a guaranteed part of the API is not fragile. For the C structures,
check for the n_fields attribute.
In the future, the C API needs to grow to match the namedtuple() API and we
should add an abstract base class describing the common API. Then you'll be
able to write:
if isinstance(obj, abc_namedtuple).
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<http://bugs.python.org/issue7796>
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