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Merged revisions 78959,79170,79175,79177,79180,79183,79186,79193,79581 via svnmerge from
svn+ssh://svn.python.org/python/branches/py3k
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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
svn+ssh://pythondev@svn.python.org/python/trunk
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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
svn+ssh://pythondev@svn.python.org/python/trunk
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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
svn+ssh://pythondev@svn.python.org/python/trunk
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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
svn+ssh://pythondev@svn.python.org/python/trunk
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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
svn+ssh://pythondev@svn.python.org/python/trunk
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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
svn+ssh://pythondev@svn.python.org/python/trunk
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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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This commit is contained in:
Georg Brandl
parent
d6abb72a79
commit
16215c732c
19 changed files with 155 additions and 99 deletions
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@ -120,7 +120,7 @@ namespace is searched. The global statement must precede all uses of the name.
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.. index:: pair: restricted; execution
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The built-in namespace associated with the execution of a code block is actually
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The builtins namespace associated with the execution of a code block is actually
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found by looking up the name ``__builtins__`` in its global namespace; this
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should be a dictionary or a module (in the latter case the module's dictionary
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is used). By default, when in the :mod:`__main__` module, ``__builtins__`` is
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@ -132,7 +132,7 @@ weak form of restricted execution.
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.. impl-detail::
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Users should not touch ``__builtins__``; it is strictly an implementation
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detail. Users wanting to override values in the built-in namespace should
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detail. Users wanting to override values in the builtins namespace should
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:keyword:`import` the :mod:`builtins` module and modify its
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attributes appropriately.
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@ -1120,12 +1120,7 @@ Boolean operations
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pair: Conditional; expression
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pair: Boolean; operation
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Boolean operations have the lowest priority of all Python operations:
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.. productionlist::
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expression: `conditional_expression` | `lambda_form`
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expression_nocond: `or_test` | `lambda_form_nocond`
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conditional_expression: `or_test` ["if" `or_test` "else" `expression`]
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or_test: `and_test` | `or_test` "or" `and_test`
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and_test: `not_test` | `and_test` "and" `not_test`
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not_test: `comparison` | "not" `not_test`
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@ -1142,10 +1137,6 @@ truth value by providing a :meth:`__bool__` method.
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The operator :keyword:`not` yields ``True`` if its argument is false, ``False``
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otherwise.
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The expression ``x if C else y`` first evaluates *C* (*not* *x*); if *C* is
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true, *x* is evaluated and its value is returned; otherwise, *y* is evaluated
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and its value is returned.
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.. index:: operator: and
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The expression ``x and y`` first evaluates *x*; if *x* is false, its value is
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@ -1165,6 +1156,30 @@ not bother to return a value of the same type as its argument, so e.g., ``not
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'foo'`` yields ``False``, not ``''``.)
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Conditional Expressions
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=======================
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.. versionadded:: 2.5
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.. index::
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pair: conditional; expression
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pair: ternary; operator
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.. productionlist::
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conditional_expression: `or_test` ["if" `or_test` "else" `expression`]
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expression: `conditional_expression` | `lambda_form`
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expression_nocond: `or_test` | `lambda_form_nocond`
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Conditional expressions (sometimes called a "ternary operator") have the lowest
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priority of all Python operations.
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The expression ``x if C else y`` first evaluates the condition, *C* (*not* *x*);
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if *C* is true, *x* is evaluated and its value is returned; otherwise, *y* is
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evaluated and its value is returned.
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See :pep:`308` for more details about conditional expressions.
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.. _lambdas:
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.. _lambda:
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@ -1259,6 +1274,8 @@ groups from right to left).
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+===============================================+=====================================+
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| :keyword:`lambda` | Lambda expression |
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+-----------------------------------------------+-------------------------------------+
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| :keyword:`if` -- :keyword:`else` | Conditional expression |
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+-----------------------------------------------+-------------------------------------+
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| :keyword:`or` | Boolean OR |
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+-----------------------------------------------+-------------------------------------+
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| :keyword:`and` | Boolean AND |
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@ -148,9 +148,9 @@ Assignment of an object to a single target is recursively defined as follows.
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.. index:: single: destructor
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The name is rebound if it was already bound. This may cause the reference count
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for the object previously bound to the name to reach zero, causing the object to
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be deallocated and its destructor (if it has one) to be called.
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The name is rebound if it was already bound. This may cause the reference
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count for the object previously bound to the name to reach zero, causing the
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object to be deallocated and its destructor (if it has one) to be called.
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* If the target is a target list enclosed in parentheses or in square brackets:
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The object must be an iterable with the same number of items as there are
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