2 :mod:`__builtin__` --- Built-in objects
3 =======================================
5 .. module:: __builtin__
6 :synopsis: The module that provides the built-in namespace.
9 This module provides direct access to all 'built-in' identifiers of Python; for
10 example, ``__builtin__.open`` is the full name for the built-in function
11 :func:`open`. See chapter :ref:`builtin`.
13 This module is not normally accessed explicitly by most applications, but can be
14 useful in modules that provide objects with the same name as a built-in value,
15 but in which the built-in of that name is also needed. For example, in a module
16 that wants to implement an :func:`open` function that wraps the built-in
17 :func:`open`, this module can be used directly::
22 f = __builtin__.open(path, 'r')
26 '''Wrapper around a file that converts output to upper-case.'''
28 def __init__(self, f):
31 def read(self, count=-1):
32 return self._f.read(count).upper()
38 Most modules have the name ``__builtins__`` (note the ``'s'``) made available
39 as part of their globals. The value of ``__builtins__`` is normally either
40 this module or the value of this modules's :attr:`__dict__` attribute. Since
41 this is an implementation detail, it may not be used by alternate
42 implementations of Python.