
``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.
