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python3.11
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future
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builtins
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disabled.py
""" This disables builtin functions (and one exception class) which are removed from Python 3.3. This module is designed to be used like this:: from future.builtins.disabled import * This disables the following obsolete Py2 builtin functions:: apply, cmp, coerce, execfile, file, input, long, raw_input, reduce, reload, unicode, xrange We don't hack __builtin__, which is very fragile because it contaminates imported modules too. Instead, we just create new functions with the same names as the obsolete builtins from Python 2 which raise NameError exceptions when called. Note that both ``input()`` and ``raw_input()`` are among the disabled functions (in this module). Although ``input()`` exists as a builtin in Python 3, the Python 2 ``input()`` builtin is unsafe to use because it can lead to shell injection. Therefore we shadow it by default upon ``from future.builtins.disabled import *``, in case someone forgets to import our replacement ``input()`` somehow and expects Python 3 semantics. See the ``future.builtins.misc`` module for a working version of ``input`` with Python 3 semantics. (Note that callable() is not among the functions disabled; this was reintroduced into Python 3.2.) This exception class is also disabled: StandardError """ from __future__ import division, absolute_import, print_function from future import utils OBSOLETE_BUILTINS = ['apply', 'chr', 'cmp', 'coerce', 'execfile', 'file', 'input', 'long', 'raw_input', 'reduce', 'reload', 'unicode', 'xrange', 'StandardError'] def disabled_function(name): ''' Returns a function that cannot be called ''' def disabled(*args, **kwargs): ''' A function disabled by the ``future`` module. This function is no longer a builtin in Python 3. ''' raise NameError('obsolete Python 2 builtin {0} is disabled'.format(name)) return disabled if not utils.PY3: for fname in OBSOLETE_BUILTINS: locals()[fname] = disabled_function(fname) __all__ = OBSOLETE_BUILTINS else: __all__ = []
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