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Clarify one-item tuple #114745

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Merged
merged 2 commits into from
Jan 30, 2024
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Clarify one-item tuple #114745

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cfe808a
<PR> Clarify one-item tuple.
terryjreedy Jan 30, 2024
596bede
Removed parenthetical 'singleton' comment
terryjreedy Jan 30, 2024
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5 changes: 3 additions & 2 deletions 5 Doc/reference/expressions.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -1890,8 +1890,9 @@ the unpacking.

.. index:: pair: trailing; comma

The trailing comma is required only to create a single tuple (a.k.a. a
*singleton*); it is optional in all other cases. A single expression without a
A trailing comma is required only to create a one-item tuple,
such as ``1,``; it is optional in all other cases.
A single expression without a
trailing comma doesn't create a tuple, but rather yields the value of that
expression. (To create an empty tuple, use an empty pair of parentheses:
``()``.)
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