diff options
| author | Martin Panter <vadmium+py@gmail.com> | 2015-10-03 07:46:04 (GMT) |
|---|---|---|
| committer | Martin Panter <vadmium+py@gmail.com> | 2015-10-03 07:46:04 (GMT) |
| commit | 3795d12a0d6f2be8d0a062c3ba878fc4800e2db1 (patch) | |
| tree | 015e54eb152b8fbd14d6bdf7947048233cd73080 /Doc/library | |
| parent | cb29e8c0e5dc67c5f73926ea0c540612ca40714a (diff) | |
| download | cpython-3795d12a0d6f2be8d0a062c3ba878fc4800e2db1.zip cpython-3795d12a0d6f2be8d0a062c3ba878fc4800e2db1.tar.gz cpython-3795d12a0d6f2be8d0a062c3ba878fc4800e2db1.tar.bz2 | |
Issue #16701: Document += and *= for mutable sequences
Diffstat (limited to 'Doc/library')
| -rw-r--r-- | Doc/library/stdtypes.rst | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst index c3dc63d..ce3c532 100644 --- a/Doc/library/stdtypes.rst +++ b/Doc/library/stdtypes.rst @@ -1063,10 +1063,14 @@ accepts integers that meet the value restriction ``0 <= x <= 255``). | ``s.copy()`` | creates a shallow copy of ``s``| \(5) | | | (same as ``s[:]``) | | +------------------------------+--------------------------------+---------------------+ -| ``s.extend(t)`` | extends *s* with the | | -| | contents of *t* (same as | | +| ``s.extend(t)`` or | extends *s* with the | | +| ``s += t`` | contents of *t* (for the | | +| | most part the same as | | | | ``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 | | | | index given by *i* | | | | (same as ``s[i:i] = [x]``) | | @@ -1107,6 +1111,12 @@ Notes: .. versionadded:: 3.3 :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: |