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Code Issues Releases Wiki Activity

Issue #16701: Document += and *= for mutable sequences

This commit is contained in:
Martin Panter 2015-10-03 07:46:04 +00:00
parent cb29e8c0e5
commit 3795d12a0d
1 changed files with 12 additions and 2 deletions
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Doc/library/stdtypes.rst
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@ -1063,10 +1063,14 @@ accepts integers that meet the value restriction ``0 <= x <= 255``).
| ``s.copy()`` | creates a shallow copy of ``s``| \(5) | | ``s.copy()`` | creates a shallow copy of ``s``| \(5) |
| | (same as ``s[:]``) | | | | (same as ``s[:]``) | |
+------------------------------+--------------------------------+---------------------+ +------------------------------+--------------------------------+---------------------+
| ``s.extend(t)`` | extends *s* with the | | | ``s.extend(t)`` or | extends *s* with the | |
| | contents of *t* (same as | | | ``s += t`` | contents of *t* (for the | |
| | most part the same as | |
| | ``s[len(s):len(s)] = t``) | | | | ``s[len(s):len(s)] = t``) | |
+------------------------------+--------------------------------+---------------------+ +------------------------------+--------------------------------+---------------------+
| ``s *= n`` | updates *s* with its contents | \(6) |
| | repeated *n* times | |
+------------------------------+--------------------------------+---------------------+
| ``s.insert(i, x)`` | inserts *x* into *s* at the | | | ``s.insert(i, x)`` | inserts *x* into *s* at the | |
| | index given by *i* | | | | index given by *i* | |
| | (same as ``s[i:i] = [x]``) | | | | (same as ``s[i:i] = [x]``) | |
@ -1107,6 +1111,12 @@ Notes:
.. versionadded:: 3.3 .. versionadded:: 3.3
:meth:`clear` and :meth:`!copy` methods. :meth:`clear` and :meth:`!copy` methods.
(6)
The value *n* is an integer, or an object implementing
:meth:`~object.__index__`. Zero and negative values of *n* clear
the sequence. Items in the sequence are not copied; they are referenced
multiple times, as explained for ``s * n`` under :ref:`typesseq-common`.
.. _typesseq-list: .. _typesseq-list: