New submission from Raymond Hettinger <[email protected]>:
The attribute name, '_fields_defaults' was misspelled and should have been
''_field_defaults'. The namedtuple documentation uses both spellings. The
typing.NamedTuple class consistently uses the latter spelling. The intent was
the both would be spelled the same way.
>>> from typing import NamedTuple
>>> class Employee(NamedTuple):
name: str
id: int = 3
>>> Employee._field_defaults
{'id': 3}
>>> from collections import namedtuple
>>> Employee = namedtuple('Employee', ['name', 'id'], defaults=[3])
>>> Employee._fields_defaults
{'id': 3}
Since 3.7 API is already released, it may be reasonable to provide both
spellings for namedtuple().
----------
assignee: rhettinger
components: Library (Lib)
messages: 338096
nosy: rhettinger
priority: normal
severity: normal
status: open
title: Fix misspelled attribute name in namedtuple()
type: behavior
versions: Python 3.7, Python 3.8
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Python tracker <[email protected]>
<https://bugs.python.org/issue36321>
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