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gh-160426: Note that iterating over a dict yields its keys #160428

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3 changes: 3 additions & 0 deletions Doc/builtins/functions.rst
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Expand Up @@ -537,6 +537,9 @@ are always available. They are listed here in alphabetical order.
Create a new dictionary. The :class:`dict` object is the dictionary class.
See also :ref:`typesmapping` for documentation about this class.

Iterating over a dictionary yields its keys; use :meth:`dict.items` to
iterate over key-value pairs.

For other containers see the built-in :class:`frozendict`, :class:`list`,
:class:`set`, and :class:`tuple` classes, as well as the :mod:`collections` module.

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