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 Built-in Functions and Built-in Constants 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
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() # ...
CPython 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.
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Licensed under the PSF License.