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Doc/library/builtins.rst
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RUANG (Roy James)
gh-99030: Added documentation links for types and exceptions (GH-123857)
21 окт 2024, 03:36
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21 окт 2024, 03:36
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: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 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. .. seealso:: * :ref:`built-in-consts` * :ref:`bltin-exceptions` * :ref:`built-in-funcs` * :ref:`bltin-types`