Merged revisions 78959,79170,79175,79177,79180,79183,79186,79193,79581 via svnmerge from
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r78959 | georg.brandl | 2010-03-14 11:56:14 +0100 (So, 14 Mär 2010) | 33 lines
Merged revisions 78760,78771-78773,78802,78922,78952 via svnmerge from
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r78760 | georg.brandl | 2010-03-07 16:23:59 +0100 (So, 07 Mär 2010) | 1 line
#5341: more built-in vs builtin fixes.
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r78771 | georg.brandl | 2010-03-07 21:58:31 +0100 (So, 07 Mär 2010) | 1 line
#8085: The function is called PyObject_NewVar, not PyObject_VarNew.
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r78772 | georg.brandl | 2010-03-07 22:12:28 +0100 (So, 07 Mär 2010) | 1 line
#8039: document conditional expressions better, giving them their own section.
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r78773 | georg.brandl | 2010-03-07 22:32:06 +0100 (So, 07 Mär 2010) | 1 line
#8044: document Py_{Enter,Leave}RecursiveCall functions.
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r78802 | georg.brandl | 2010-03-08 17:28:40 +0100 (Mo, 08 Mär 2010) | 1 line
Fix typo.
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r78922 | georg.brandl | 2010-03-13 14:41:58 +0100 (Sa, 13 Mär 2010) | 1 line
Update for new download location.
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r78952 | georg.brandl | 2010-03-14 10:55:08 +0100 (So, 14 Mär 2010) | 1 line
#8137: add iso-8859-16 to the standard encodings table.
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r79170 | georg.brandl | 2010-03-21 10:02:59 +0100 (So, 21 Mär 2010) | 1 line
Fix some issues found by Jacques Ducasse on the docs list.
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r79175 | georg.brandl | 2010-03-21 10:10:32 +0100 (So, 21 Mär 2010) | 9 lines
Merged revisions 79172 via svnmerge from
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r79172 | georg.brandl | 2010-03-21 10:08:00 +0100 (So, 21 Mär 2010) | 1 line
Add a paragraph about set displays.
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r79177 | georg.brandl | 2010-03-21 10:25:54 +0100 (So, 21 Mär 2010) | 1 line
Need to use list(range()) to get a list.
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r79180 | georg.brandl | 2010-03-21 10:50:49 +0100 (So, 21 Mär 2010) | 9 lines
Merged revisions 79178 via svnmerge from
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r79178 | georg.brandl | 2010-03-21 10:28:16 +0100 (So, 21 Mär 2010) | 1 line
Clarify that for shell=True, the shell PID will be the child PID.
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r79183 | georg.brandl | 2010-03-21 10:52:24 +0100 (So, 21 Mär 2010) | 9 lines
Merged revisions 79181 via svnmerge from
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r79181 | georg.brandl | 2010-03-21 10:51:16 +0100 (So, 21 Mär 2010) | 1 line
Update os.kill() emulation example for Windows to use ctypes.
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r79186 | georg.brandl | 2010-03-21 11:03:36 +0100 (So, 21 Mär 2010) | 13 lines
Merged revisions 79184-79185 via svnmerge from
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r79184 | georg.brandl | 2010-03-21 10:58:36 +0100 (So, 21 Mär 2010) | 1 line
Update text for newest US DST regulation. The sample file already has the calculation right.
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r79185 | georg.brandl | 2010-03-21 11:02:47 +0100 (So, 21 Mär 2010) | 1 line
Include structmember.h correctly.
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r79193 | georg.brandl | 2010-03-21 12:53:50 +0100 (So, 21 Mär 2010) | 9 lines
Merged revisions 79192 via svnmerge from
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r79192 | georg.brandl | 2010-03-21 12:50:58 +0100 (So, 21 Mär 2010) | 1 line
Remove leftover word.
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r79581 | georg.brandl | 2010-04-02 10:47:07 +0200 (Fr, 02 Apr 2010) | 1 line
#8213: document behavior of -u on py3k better.
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diff --git a/Doc/reference/expressions.rst b/Doc/reference/expressions.rst
index c7dd3fc..c71e89e 100644
--- a/Doc/reference/expressions.rst
+++ b/Doc/reference/expressions.rst
@@ -1120,12 +1120,7 @@
pair: Conditional; expression
pair: Boolean; operation
-Boolean operations have the lowest priority of all Python operations:
-
.. productionlist::
- expression: `conditional_expression` | `lambda_form`
- expression_nocond: `or_test` | `lambda_form_nocond`
- conditional_expression: `or_test` ["if" `or_test` "else" `expression`]
or_test: `and_test` | `or_test` "or" `and_test`
and_test: `not_test` | `and_test` "and" `not_test`
not_test: `comparison` | "not" `not_test`
@@ -1142,10 +1137,6 @@
The operator :keyword:`not` yields ``True`` if its argument is false, ``False``
otherwise.
-The expression ``x if C else y`` first evaluates *C* (*not* *x*); if *C* is
-true, *x* is evaluated and its value is returned; otherwise, *y* is evaluated
-and its value is returned.
-
.. index:: operator: and
The expression ``x and y`` first evaluates *x*; if *x* is false, its value is
@@ -1165,6 +1156,30 @@
'foo'`` yields ``False``, not ``''``.)
+Conditional Expressions
+=======================
+
+.. versionadded:: 2.5
+
+.. index::
+ pair: conditional; expression
+ pair: ternary; operator
+
+.. productionlist::
+ conditional_expression: `or_test` ["if" `or_test` "else" `expression`]
+ expression: `conditional_expression` | `lambda_form`
+ expression_nocond: `or_test` | `lambda_form_nocond`
+
+Conditional expressions (sometimes called a "ternary operator") have the lowest
+priority of all Python operations.
+
+The expression ``x if C else y`` first evaluates the condition, *C* (*not* *x*);
+if *C* is true, *x* is evaluated and its value is returned; otherwise, *y* is
+evaluated and its value is returned.
+
+See :pep:`308` for more details about conditional expressions.
+
+
.. _lambdas:
.. _lambda:
@@ -1259,6 +1274,8 @@
+===============================================+=====================================+
| :keyword:`lambda` | Lambda expression |
+-----------------------------------------------+-------------------------------------+
+| :keyword:`if` -- :keyword:`else` | Conditional expression |
++-----------------------------------------------+-------------------------------------+
| :keyword:`or` | Boolean OR |
+-----------------------------------------------+-------------------------------------+
| :keyword:`and` | Boolean AND |