builtins — Built-in objects
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
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 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__ made available as part of their globals. The value of
__builtins__ is normally either this module or the value of this module’s
__dict__ attribute. Since this is an implementation detail, it may not be used by alternate implementations of Python.