#16523: merge with 3.3.

Doc/library/operator.rst

@@ -249,13 +249,22 @@ lookups.  These are useful for making fast field extractors as arguments for
 expect a function argument.
 
 
-.. function:: attrgetter(attr[, args...])
+.. function:: attrgetter(attr)
+              attrgetter(*attrs)
 
-   Return a callable object that fetches *attr* from its operand. If more than one
+   Return a callable object that fetches *attr* from its operand.
-   attribute is requested, returns a tuple of attributes. After,
+   If more than one attribute is requested, returns a tuple of attributes.
-   ``f = attrgetter('name')``, the call ``f(b)`` returns ``b.name``.  After,
+   The attribute names can also contain dots. For example:
-   ``f = attrgetter('name', 'date')``, the call ``f(b)`` returns ``(b.name,
+
-   b.date)``.  Equivalent to::
+   * After ``f = attrgetter('name')``, the call ``f(b)`` returns ``b.name``.
+
+   * After ``f = attrgetter('name', 'date')``, the call ``f(b)`` returns
+     ``(b.name, b.date)``.
+
+   * After ``f = attrgetter('name.first', 'name.last')``, the call ``f(b)``
+     returns ``(r.name.first, r.name.last)``.
+
+   Equivalent to::
 
       def attrgetter(*items):
           if any(not isinstance(item, str) for item in items):
@@ -275,14 +284,19 @@ expect a function argument.
           return obj
 
 
-   The attribute names can also contain dots; after ``f = attrgetter('date.month')``,
+.. function:: itemgetter(item)
-   the call ``f(b)`` returns ``b.date.month``.
+              itemgetter(*items)
-
-.. function:: itemgetter(item[, args...])
 
    Return a callable object that fetches *item* from its operand using the
    operand's :meth:`__getitem__` method.  If multiple items are specified,
-   returns a tuple of lookup values.  Equivalent to::
+   returns a tuple of lookup values.  For example:
+
+   * After ``f = itemgetter(2)``, the call ``f(r)`` returns ``r[2]``.
+
+   * After ``g = itemgetter(2, 5, 3)``, the call ``g(r)`` returns
+     ``(r[2], r[5], r[3])``.
+
+   Equivalent to::
 
       def itemgetter(*items):
           if len(items) == 1:
@@ -321,9 +335,14 @@ expect a function argument.
 
    Return a callable object that calls the method *name* on its operand.  If
    additional arguments and/or keyword arguments are given, they will be given
-   to the method as well.  After ``f = methodcaller('name')``, the call ``f(b)``
+   to the method as well.  For example:
-   returns ``b.name()``.  After ``f = methodcaller('name', 'foo', bar=1)``, the
+
-   call ``f(b)`` returns ``b.name('foo', bar=1)``.  Equivalent to::
+   * After ``f = methodcaller('name')``, the call ``f(b)`` returns ``b.name()``.
+
+   * After ``f = methodcaller('name', 'foo', bar=1)``, the call ``f(b)``
+     returns ``b.name('foo', bar=1)``.
+
+   Equivalent to::
 
       def methodcaller(name, *args, **kwargs):
           def caller(obj):

Lib/operator.py

@@ -223,9 +223,9 @@ def length_hint(obj, default=0):
 class attrgetter:
     """
     Return a callable object that fetches the given attribute(s) from its operand.
-    After f=attrgetter('name'), the call f(r) returns r.name.
+    After f = attrgetter('name'), the call f(r) returns r.name.
-    After g=attrgetter('name', 'date'), the call g(r) returns (r.name, r.date).
+    After g = attrgetter('name', 'date'), the call g(r) returns (r.name, r.date).
-    After h=attrgetter('name.first', 'name.last'), the call h(r) returns
+    After h = attrgetter('name.first', 'name.last'), the call h(r) returns
     (r.name.first, r.name.last).
     """
     def __init__(self, attr, *attrs):
@@ -250,8 +250,8 @@ class attrgetter:
 class itemgetter:
     """
     Return a callable object that fetches the given item(s) from its operand.
-    After f=itemgetter(2), the call f(r) returns r[2].
+    After f = itemgetter(2), the call f(r) returns r[2].
-    After g=itemgetter(2,5,3), the call g(r) returns (r[2], r[5], r[3])
+    After g = itemgetter(2, 5, 3), the call g(r) returns (r[2], r[5], r[3])
     """
     def __init__(self, item, *items):
         if not items:

Modules/_operator.c

@@ -485,8 +485,8 @@ PyDoc_STRVAR(itemgetter_doc,
 "itemgetter(item, ...) --> itemgetter object\n\
 \n\
 Return a callable object that fetches the given item(s) from its operand.\n\
-After f=itemgetter(2), the call f(r) returns r[2].\n\
+After f = itemgetter(2), the call f(r) returns r[2].\n\
-After g=itemgetter(2,5,3), the call g(r) returns (r[2], r[5], r[3])");
+After g = itemgetter(2, 5, 3), the call g(r) returns (r[2], r[5], r[3])");
 
 static PyTypeObject itemgetter_type = {
     PyVarObject_HEAD_INIT(NULL, 0)
@@ -737,9 +737,9 @@ PyDoc_STRVAR(attrgetter_doc,
 "attrgetter(attr, ...) --> attrgetter object\n\
 \n\
 Return a callable object that fetches the given attribute(s) from its operand.\n\
-After f=attrgetter('name'), the call f(r) returns r.name.\n\
+After f = attrgetter('name'), the call f(r) returns r.name.\n\
-After g=attrgetter('name', 'date'), the call g(r) returns (r.name, r.date).\n\
+After g = attrgetter('name', 'date'), the call g(r) returns (r.name, r.date).\n\
-After h=attrgetter('name.first', 'name.last'), the call h(r) returns\n\
+After h = attrgetter('name.first', 'name.last'), the call h(r) returns\n\
 (r.name.first, r.name.last).");
 
 static PyTypeObject attrgetter_type = {