diff --git a/Doc/conf.py b/Doc/conf.py index de944ac884c..551452babd4 100644 --- a/Doc/conf.py +++ b/Doc/conf.py @@ -141,6 +141,8 @@ latex_preamble = r''' \strong{Python Software Foundation}\\ Email: \email{docs@python.org} } +\let\Verbatim=\OriginalVerbatim +\let\endVerbatim=\endOriginalVerbatim ''' # Documents to append as an appendix to all manuals. diff --git a/Doc/reference/datamodel.rst b/Doc/reference/datamodel.rst index a531350874a..94bcb1b1aba 100644 --- a/Doc/reference/datamodel.rst +++ b/Doc/reference/datamodel.rst @@ -1202,20 +1202,22 @@ Basic customization object: dictionary builtin: hash - Called for the key object for dictionary operations, and by the built-in - function :func:`hash`. Should return an integer usable as a hash value - for dictionary operations. The only required property is that objects which - compare equal have the same hash value; it is advised to somehow mix together - (e.g., using exclusive or) the hash values for the components of the object that - also play a part in comparison of objects. + Called by built-in function :func:`hash` and for operations on members of + hashed collections including :class:`set`, :class:`frozenset`, and + :class:`dict`. :meth:`__hash__` should return an integer. The only required + property is that objects which compare equal have the same hash value; it is + advised to somehow mix together (e.g. using exclusive or) the hash values for + the components of the object that also play a part in comparison of objects. If a class does not define an :meth:`__eq__` method it should not define a :meth:`__hash__` operation either; if it defines :meth:`__eq__` but not - :meth:`__hash__`, its instances will not be usable as dictionary keys. If a - class defines mutable objects and implements an :meth:`__eq__` method, it - should not implement :meth:`__hash__`, since the dictionary implementation - requires that a key's hash value is immutable (if the object's hash value - changes, it will be in the wrong hash bucket). + :meth:`__hash__`, its instances will not be usable as items in hashable + collections. If a class defines mutable objects and implements an + :meth:`__eq__` method, it should not implement :meth:`__hash__`, since the + implementation of hashable collections requires that a key's hash value is + immutable (if the object's hash value changes, it will be in the wrong hash + bucket). + User-defined classes have :meth:`__eq__` and :meth:`__hash__` methods by default; with them, all objects compare unequal (except with themselves) diff --git a/Doc/tools/sphinxext/download.html b/Doc/tools/sphinxext/download.html index 59aea630389..e5a25f7c23c 100644 --- a/Doc/tools/sphinxext/download.html +++ b/Doc/tools/sphinxext/download.html @@ -14,7 +14,7 @@
To download an archive containing all the documents for this version of Python in one of various formats, follow one of links in this table. The numbers -in the table are the size of the download files in Kilobytes.
+in the table are the size of the download files in megabytes.Format | Packed as .zip | Packed as .tar.bz2 |
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