diff options
Diffstat (limited to 'Doc')
| -rw-r--r-- | Doc/library/collections.rst | 48 | ||||
| -rw-r--r-- | Doc/library/userdict.rst | 52 |
2 files changed, 41 insertions, 59 deletions
diff --git a/Doc/library/collections.rst b/Doc/library/collections.rst index 0be8d07..d218a9b 100644 --- a/Doc/library/collections.rst +++ b/Doc/library/collections.rst @@ -32,25 +32,32 @@ ABC Notes :class:`collections.Iterable` Defines ``__iter__()`` :class:`collections.Iterator` Derived from :class:`Iterable` and in addition defines ``__next__()`` +:class:`collections.Sized` Defines ``__len__()`` :class:`collections.Mapping` Derived from :class:`Container`, :class:`Iterable`, and :class:`Sized`, and in addition defines ``__getitem__()``, ``get()``, ``__contains__()``, ``__len__()``, + ``__eq__()``, ``__ne__()``, ``__iter__()``, ``keys()``, ``items()``, and ``values()`` :class:`collections.MutableMapping` Derived from :class:`Mapping` +:class:`collections.Sequence` Derived from :class:`Container`, + :class:`Iterable`, and :class:`Sized`, + and in addition defines + ``__getitem__()` :class:`collections.MutableSequence` Derived from :class:`Sequence` +:class:`collections.Set` Derived from :class:`Container`, :class:`Iterable`, :class:`Sized`. + add in addition defines + ``__le__()``, ``__lt__()``, ``__eq__()``, + ``__and__()``, ``__or__()``, ``__sub__()``, + ``__xor__()``, and ``isdisjoint()``, :class:`collections.MutableSet` Derived from :class:`Set` and in addition defines ``add()``, ``clear()``, ``discard()``, ``pop()``, - and ``toggle()`` -:class:`collections.Sequence` Derived from :class:`Container`, - :class:`Iterable`, and :class:`Sized`, - and in addition defines - ``__getitem__()`` -:class:`collections.Set` Derived from :class:`Container`, :class:`Iterable`, and :class:`Sized` -:class:`collections.Sized` Defines ``__len__()`` + ``remove()``, ``__ior__()``, ``__iand__()``, + ``__ixor__()``, and ``__isub__()`` + ===================================== ======================================== .. XXX Have not included them all and the notes are incomplete @@ -577,3 +584,30 @@ customize a prototype instance:: .. [#] For information on the double-star-operator see :ref:`tut-unpacking-arguments` and :ref:`calls`. + + + +:class:`UserDict` objects +---------------------- + +The class, :class:`UserDict` acts as a wrapper around dictionary objects. +The need for this class has been partially supplanted by the ability to +subclass directly from :class:`dict`; however, this class can be easier +to work with because the underlying dictionary is accessible as an +attribute. + +.. class:: UserDict([initialdata]) + + Class that simulates a dictionary. The instance's contents are kept in a + regular dictionary, which is accessible via the :attr:`data` attribute of + :class:`UserDict` instances. If *initialdata* is provided, :attr:`data` is + initialized with its contents; note that a reference to *initialdata* will not + be kept, allowing it be used for other purposes. + +In addition to supporting the methods and operations of mappings, +:class:`UserDict` and :class:`IterableUserDict` instances +provide the following attribute: + +.. attribute:: UserDict.data + + A real dictionary used to store the contents of the :class:`UserDict` class. diff --git a/Doc/library/userdict.rst b/Doc/library/userdict.rst index 820a743..1475197 100644 --- a/Doc/library/userdict.rst +++ b/Doc/library/userdict.rst @@ -1,56 +1,4 @@ -:mod:`UserDict` --- Class wrapper for dictionary objects -======================================================== - -.. module:: UserDict - :synopsis: Class wrapper for dictionary objects. - - -The module defines a mixin, :class:`DictMixin`, defining all dictionary methods -for classes that already have a minimum mapping interface. This greatly -simplifies writing classes that need to be substitutable for dictionaries (such -as the shelve module). - -This also module defines a class, :class:`UserDict`, that acts as a wrapper -around dictionary objects. The need for this class has been largely supplanted -by the ability to subclass directly from :class:`dict` (a feature that became -available starting with Python version 2.2). Prior to the introduction of -:class:`dict`, the :class:`UserDict` class was used to create dictionary-like -sub-classes that obtained new behaviors by overriding existing methods or adding -new ones. - -The :mod:`UserDict` module defines the :class:`UserDict` class and -:class:`DictMixin`: - - -.. class:: UserDict([initialdata]) - - Class that simulates a dictionary. The instance's contents are kept in a - regular dictionary, which is accessible via the :attr:`data` attribute of - :class:`UserDict` instances. If *initialdata* is provided, :attr:`data` is - initialized with its contents; note that a reference to *initialdata* will not - be kept, allowing it be used for other purposes. - - .. note:: - - For backward compatibility, instances of :class:`UserDict` are not - iterable. - - -.. class:: IterableUserDict([initialdata]) - - Subclass of :class:`UserDict` that supports direct iteration (e.g. ``for key in - myDict``). - -In addition to supporting the methods and operations of mappings (see section -:ref:`typesmapping`), :class:`UserDict` and :class:`IterableUserDict` instances -provide the following attribute: - - -.. attribute:: IterableUserDict.data - - A real dictionary used to store the contents of the :class:`UserDict` class. - :mod:`UserList` --- Class wrapper for list objects ================================================== |