Yurttas/PL/SL/python/docs/core-python-programming/doc/152/lib/module-builtin.html
3.31 __builtin__ -- Built-in functions
This module provides direct access to all `built-in' identifiers of Python; e.g. __builtin__.open is the full name for the built-in function open(). See section 2.3, ``Built-in Functions.''
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