Merged revisions 74492,74531,74545-74550,74553-74555,74588,74603,74608,74614,74616-74618,74631-74633,74652-74653,74666,74671,74737,74739,74779,74781-74782,74784,74791,74793,74818-74820,74822,74832 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
........
r74492 | r.david.murray | 2009-08-17 21:26:49 +0200 (Mo, 17 Aug 2009) | 2 lines
Issue 6685: 'toupper' -> 'upper' in cgi doc example explanation.
........
r74531 | vinay.sajip | 2009-08-21 00:04:32 +0200 (Fr, 21 Aug 2009) | 1 line
Added section on exceptions raised during logging.
........
r74545 | georg.brandl | 2009-08-24 19:14:29 +0200 (Mo, 24 Aug 2009) | 1 line
#6772: mention utf-8 as utf8 alias.
........
r74546 | georg.brandl | 2009-08-24 19:20:40 +0200 (Mo, 24 Aug 2009) | 1 line
#6725: spell "namespace" consistently.
........
r74547 | georg.brandl | 2009-08-24 19:22:05 +0200 (Mo, 24 Aug 2009) | 1 line
#6718: fix example.
........
r74548 | georg.brandl | 2009-08-24 19:24:27 +0200 (Mo, 24 Aug 2009) | 1 line
#6677: mention "deleting" as an alias for removing files.
........
r74549 | benjamin.peterson | 2009-08-24 19:42:36 +0200 (Mo, 24 Aug 2009) | 1 line
fix pdf building by teaching latex the right encoding package
........
r74550 | georg.brandl | 2009-08-24 19:48:40 +0200 (Mo, 24 Aug 2009) | 1 line
#6677: note that rmdir only removes empty directories.
........
r74553 | r.david.murray | 2009-08-27 03:04:59 +0200 (Do, 27 Aug 2009) | 2 lines
Remove leftover text from end of sentence.
........
r74554 | georg.brandl | 2009-08-27 20:59:02 +0200 (Do, 27 Aug 2009) | 1 line
Typo fix.
........
r74555 | georg.brandl | 2009-08-27 21:02:43 +0200 (Do, 27 Aug 2009) | 1 line
#6787: reference fix.
........
r74588 | georg.brandl | 2009-08-30 10:35:01 +0200 (So, 30 Aug 2009) | 1 line
#6803: fix old name.
........
r74603 | georg.brandl | 2009-08-31 08:38:29 +0200 (Mo, 31 Aug 2009) | 1 line
other -> others where multiple arguments are accepted.
........
r74608 | senthil.kumaran | 2009-08-31 18:40:27 +0200 (Mo, 31 Aug 2009) | 3 lines
Doc fix for the issue2637.
........
r74614 | georg.brandl | 2009-09-01 09:40:54 +0200 (Di, 01 Sep 2009) | 1 line
#6813: better documentation for numberless string formats.
........
r74616 | georg.brandl | 2009-09-01 09:46:26 +0200 (Di, 01 Sep 2009) | 1 line
#6808: clarification.
........
r74617 | georg.brandl | 2009-09-01 09:53:37 +0200 (Di, 01 Sep 2009) | 1 line
#6765: hint that log(x, base) is not very sophisticated.
........
r74618 | georg.brandl | 2009-09-01 10:00:47 +0200 (Di, 01 Sep 2009) | 1 line
#6810: add a link to the section about frame objects instead of just a description where to find it.
........
r74631 | georg.brandl | 2009-09-02 22:37:16 +0200 (Mi, 02 Sep 2009) | 1 line
#6821: fix signature of PyBuffer_Release().
........
r74632 | georg.brandl | 2009-09-03 09:27:26 +0200 (Do, 03 Sep 2009) | 1 line
#6828: fix wrongly highlighted blocks.
........
r74633 | georg.brandl | 2009-09-03 14:31:39 +0200 (Do, 03 Sep 2009) | 1 line
#6757: complete the list of types that marshal can serialize.
........
r74652 | georg.brandl | 2009-09-04 13:25:37 +0200 (Fr, 04 Sep 2009) | 1 line
#6756: add some info about the "acct" parameter.
........
r74653 | georg.brandl | 2009-09-04 13:32:18 +0200 (Fr, 04 Sep 2009) | 1 line
#6777: dont discourage usage of Exception.args or promote usage of Exception.message.
........
r74666 | georg.brandl | 2009-09-05 11:04:09 +0200 (Sa, 05 Sep 2009) | 1 line
#6841: remove duplicated word.
........
r74671 | georg.brandl | 2009-09-05 18:47:17 +0200 (Sa, 05 Sep 2009) | 1 line
#6843: add link from filterwarnings to where the meaning of the arguments is covered.
........
r74737 | georg.brandl | 2009-09-09 18:49:13 +0200 (Mi, 09 Sep 2009) | 1 line
Properly document copy and deepcopy as functions.
........
r74739 | georg.brandl | 2009-09-11 09:55:20 +0200 (Fr, 11 Sep 2009) | 1 line
Move function back to its section.
........
r74779 | michael.foord | 2009-09-13 18:13:36 +0200 (So, 13 Sep 2009) | 1 line
Change to tutorial wording for reading text / binary files on Windows. Issue #6301.
........
r74781 | michael.foord | 2009-09-13 18:46:19 +0200 (So, 13 Sep 2009) | 1 line
Note that sys._getframe is not guaranteed to exist in all implementations of Python, and a corresponding note in inspect.currentframe. Issue 6712.
........
r74782 | michael.foord | 2009-09-13 19:07:46 +0200 (So, 13 Sep 2009) | 1 line
Tutorial tweaks. Issue 6849.
........
r74784 | georg.brandl | 2009-09-13 20:15:07 +0200 (So, 13 Sep 2009) | 1 line
Typo fix.
........
r74791 | georg.brandl | 2009-09-14 16:08:54 +0200 (Mo, 14 Sep 2009) | 1 line
#6574: list the future features in a table.
........
r74793 | georg.brandl | 2009-09-14 16:50:47 +0200 (Mo, 14 Sep 2009) | 1 line
#6908: fix association of hashlib hash attributes.
........
r74818 | georg.brandl | 2009-09-16 11:23:04 +0200 (Mi, 16 Sep 2009) | 1 line
#6880: add reference to classes section in exceptions section, which comes earlier.
........
r74819 | georg.brandl | 2009-09-16 11:24:57 +0200 (Mi, 16 Sep 2009) | 1 line
#6876: fix base class constructor invocation in example.
........
r74820 | georg.brandl | 2009-09-16 11:30:48 +0200 (Mi, 16 Sep 2009) | 1 line
#6891: comment out dead link to Unicode article.
........
r74822 | georg.brandl | 2009-09-16 12:12:06 +0200 (Mi, 16 Sep 2009) | 1 line
#5621: refactor description of how class/instance attributes interact on a.x=a.x+1 or augassign.
........
r74832 | georg.brandl | 2009-09-16 17:57:46 +0200 (Mi, 16 Sep 2009) | 1 line
Rewrap long lines.
........
diff --git a/Doc/reference/datamodel.rst b/Doc/reference/datamodel.rst
index 865911f..a10dbdb 100644
--- a/Doc/reference/datamodel.rst
+++ b/Doc/reference/datamodel.rst
@@ -959,6 +959,8 @@
If a code object represents a function, the first item in :attr:`co_consts` is
the documentation string of the function, or ``None`` if undefined.
+ .. _frame-objects:
+
Frame objects
.. index:: object: frame
diff --git a/Doc/reference/simple_stmts.rst b/Doc/reference/simple_stmts.rst
index 1c7ce71..8be797c 100644
--- a/Doc/reference/simple_stmts.rst
+++ b/Doc/reference/simple_stmts.rst
@@ -151,11 +151,30 @@
* If the target is an attribute reference: The primary expression in the
reference is evaluated. It should yield an object with assignable attributes;
- if this is not the case, :exc:`TypeError` is raised. That object is then asked
- to assign the assigned object to the given attribute; if it cannot perform the
- assignment, it raises an exception (usually but not necessarily
+ if this is not the case, :exc:`TypeError` is raised. That object is then
+ asked to assign the assigned object to the given attribute; if it cannot
+ perform the assignment, it raises an exception (usually but not necessarily
:exc:`AttributeError`).
+ .. _attr-target-note:
+
+ Note: If the object is a class instance and the attribute reference occurs on
+ both sides of the assignment operator, the RHS expression, ``a.x`` can access
+ either an instance attribute or (if no instance attribute exists) a class
+ attribute. The LHS target ``a.x`` is always set as an instance attribute,
+ creating it if necessary. Thus, the two occurrences of ``a.x`` do not
+ necessarily refer to the same attribute: if the RHS expression refers to a
+ class attribute, the LHS creates a new instance attribute as the target of the
+ assignment::
+
+ class Cls:
+ x = 3 # class variable
+ inst = Cls()
+ inst.x = inst.x + 1 # writes inst.x as 4 leaving Cls.x as 3
+
+ This description does not necessarily apply to descriptor attributes, such as
+ properties created with :func:`property`.
+
.. index::
pair: subscription; assignment
object: mutable
@@ -253,16 +272,8 @@
*in-place* behavior, the binary operation performed by augmented assignment is
the same as the normal binary operations.
-For targets which are attribute references, the initial value is retrieved with
-a :meth:`getattr` and the result is assigned with a :meth:`setattr`. Notice
-that the two methods do not necessarily refer to the same variable. When
-:meth:`getattr` refers to a class variable, :meth:`setattr` still writes to an
-instance variable. For example::
-
- class A:
- x = 3 # class variable
- a = A()
- a.x += 1 # writes a.x as 4 leaving A.x as 3
+For targets which are attribute references, the same :ref:`caveat about class
+and instance attributes <attr-target-note>` applies as for regular assignments.
.. _assert: