Mercurial > repos > guerler > springsuite
diff planemo/lib/python3.7/site-packages/future/builtins/disabled.py @ 0:d30785e31577 draft
"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author | guerler |
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date | Fri, 31 Jul 2020 00:18:57 -0400 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/planemo/lib/python3.7/site-packages/future/builtins/disabled.py Fri Jul 31 00:18:57 2020 -0400 @@ -0,0 +1,66 @@ +""" +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__ = []