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47 lines
1.7 KiB
47 lines
1.7 KiB
15 years ago
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##############################################################################
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#
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# Copyright (c) 2001 Zope Corporation and Contributors. All Rights Reserved.
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#
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# This software is subject to the provisions of the Zope Public License,
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# Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution.
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# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
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# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
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# FOR A PARTICULAR PURPOSE
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#
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##############################################################################
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__version__='$Revision: 1.5 $'[11:-2]
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limited_builtins = {}
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def limited_range(iFirst, *args):
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# limited range function from Martijn Pieters
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RANGELIMIT = 1000
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if not len(args):
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iStart, iEnd, iStep = 0, iFirst, 1
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elif len(args) == 1:
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iStart, iEnd, iStep = iFirst, args[0], 1
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elif len(args) == 2:
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iStart, iEnd, iStep = iFirst, args[0], args[1]
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else:
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raise AttributeError, 'range() requires 1-3 int arguments'
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if iStep == 0: raise ValueError, 'zero step for range()'
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iLen = int((iEnd - iStart) / iStep)
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if iLen < 0: iLen = 0
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if iLen >= RANGELIMIT: raise ValueError, 'range() too large'
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return range(iStart, iEnd, iStep)
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limited_builtins['range'] = limited_range
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def limited_list(seq):
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if isinstance(seq, str):
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raise TypeError, 'cannot convert string to list'
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return list(seq)
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limited_builtins['list'] = limited_list
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def limited_tuple(seq):
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if isinstance(seq, str):
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raise TypeError, 'cannot convert string to tuple'
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return tuple(seq)
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limited_builtins['tuple'] = limited_tuple
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