Python 3.6.5 Documentation > "builtins" — Built-in objects
"builtins" — Built-in objects *****************************
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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.
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