67 lines
2.5 KiB
Python
67 lines
2.5 KiB
Python
# -*- encoding: utf-8 -*-
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#
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# Copyright P. Christeas <p_christ@hol.gr> 2008,2009
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#
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#
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# WARNING: This program as such is intended to be used by professional
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# programmers who take the whole responsability of assessing all potential
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# consequences resulting from its eventual inadequacies and bugs
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# End users who are looking for a ready-to-use solution with commercial
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# garantees and support are strongly adviced to contract a Free Software
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# Service Company
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#
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# This program is Free Software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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###############################################################################
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__export_bis = {}
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import sys
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def __init_ebis():
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global __export_bis
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_evars = [ 'abs', 'all', 'any', 'basestring' , 'bool',
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'chr', 'cmp','complex', 'dict', 'divmod', 'enumerate',
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'float', 'frozenset', 'getattr', 'hasattr', 'hash',
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'hex', 'id','int', 'iter', 'len', 'list', 'long', 'map', 'max',
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'min', 'oct', 'ord','pow', 'range', 'reduce', 'repr',
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'reversed', 'round', 'set', 'setattr', 'slice','sorted', 'str',
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'sum', 'tuple','type', 'unichr','unicode', 'xrange',
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'True','False', 'None', 'NotImplemented', 'Ellipsis', ]
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if sys.version_info[0:2] >= (2,6):
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_evars.extend(['bin', 'format', 'next'])
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for v in _evars:
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__export_bis[v] = __builtins__[v]
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__init_ebis()
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def safe_eval(expr,sglobals,slocals = None):
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""" A little safer version of eval().
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This one, will use fewer builtin functions, so that only
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arithmetic and logic expressions can really work """
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global __export_bis
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if not sglobals.has_key('__builtins__'):
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# we copy, because we wouldn't want successive calls to safe_eval
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# to be able to alter the builtins.
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sglobals['__builtins__'] = __export_bis.copy()
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return eval(expr,sglobals,slocals)
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#eof
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