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[3.10] [doc] Reword sentinel object summary in dataclasses (GH-27792) #28130

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Merged
miss-islington merged 1 commit into from
Sep 2, 2021
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[3.10] [doc] Reword sentinel object summary in dataclasses (GH-27792) #28130

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7 changes: 3 additions & 4 deletions 7 Doc/library/dataclasses.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -221,10 +221,9 @@ Module contents
c.mylist += [1, 2, 3]

As shown above, the :const:`MISSING` value is a sentinel object used to
detect if the ``default`` and ``default_factory`` parameters are
provided. This sentinel is used because ``None`` is a valid value
for ``default``. No code should directly use the :const:`MISSING`
value.
detect if some parameters are provided by the user. This sentinel is
used because ``None`` is a valid value for some parameters with
a distinct meaning. No code should directly use the :const:`MISSING` value.

The parameters to :func:`field` are:

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