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This module provides direct access to all `built-in' identifiers of
Python; for example, __builtin__.open is the full name for the
built-in function open(). See chapter 2,
``Built-in Objects.''
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
open() function that wraps the built-in open(),
this module can be used directly:
import __builtin__
def open(path):
f = __builtin__.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 __dict__
attribute. Since this is an implementation detail, it may not be used
by alternate implementations of Python.
Release 2.5.2, documentation updated on 21th February, 2008.
See About this document... for information on suggesting changes.
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