blob: 2a5c7f5144bf342efbaf72a85c6ad00b684a1405 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
: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`. See chapter :ref:`builtin`.
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.
|
