mirror of
https://github.com/python/cpython.git
synced 2024-12-16 21:34:44 +08:00
2138b2edaf
And also of lowercase vs lower-case. The `-` notation should only be used for adjectives.
43 lines
1.4 KiB
ReStructuredText
43 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`. See :ref:`built-in-funcs` and :ref:`built-in-consts` for
|
|
documentation.
|
|
|
|
|
|
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 uppercase.'''
|
|
|
|
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__`` made
|
|
available as part of their globals. The value of ``__builtins__`` is normally
|
|
either this module or the value of this module's :attr:`~object.__dict__` attribute.
|
|
Since this is an implementation detail, it may not be used by alternate
|
|
implementations of Python.
|