mirror of
https://github.com/python/cpython.git
synced 2024-11-30 05:15:14 +08:00
b1493b8edd
svn+ssh://pythondev@svn.python.org/python/trunk ........ r79316 | ezio.melotti | 2010-03-23 02:25:19 +0200 (Tue, 23 Mar 2010) | 1 line Remove link to objects.rst (gone in r79179). ........
41 lines
1.4 KiB
ReStructuredText
41 lines
1.4 KiB
ReStructuredText
:mod:`builtins` --- Built-in objects
|
|
====================================
|
|
|
|
.. module:: builtins
|
|
:synopsis: The module that provides the built-in namespace.
|
|
|
|
|
|
This module provides direct access to all 'built-in' identifiers of Python; for
|
|
example, ``builtins.open`` is the full name for the built-in function
|
|
:func:`open`.
|
|
|
|
This module is not normally accessed explicitly by most applications, but can be
|
|
useful in modules that provide objects with the same name as a built-in value,
|
|
but in which the built-in of that name is also needed. For example, in a module
|
|
that wants to implement an :func:`open` function that wraps the built-in
|
|
:func:`open`, this module can be used directly::
|
|
|
|
import builtins
|
|
|
|
def open(path):
|
|
f = builtins.open(path, 'r')
|
|
return UpperCaser(f)
|
|
|
|
class UpperCaser:
|
|
'''Wrapper around a file that converts output to upper-case.'''
|
|
|
|
def __init__(self, f):
|
|
self._f = f
|
|
|
|
def read(self, count=-1):
|
|
return self._f.read(count).upper()
|
|
|
|
# ...
|
|
|
|
As an implementation detail, most modules have the name ``__builtins__`` (note
|
|
the ``'s'``) made available as part of their globals. The value of
|
|
``__builtins__`` is normally either this module or the value of this modules's
|
|
:attr:`__dict__` attribute. Since this is an implementation detail, it may not
|
|
be used by alternate implementations of Python.
|
|
|