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().

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:

importbuiltins
defopen(path):
 f = builtins.open(path, 'r')
 return UpperCaser(f)
classUpperCaser:
'''Wrapper around a file that converts output to uppercase.'''
 def__init__(self, f):
 self._f = f
 defread(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.

See also

• Built-in Constants

• Built-in Exceptions

• Built-in Functions

• Built-in Types