compat.py

"""Compatibility stuff"""

# begin[licence]
#
# [The "BSD licence"]
# Copyright (c) 2005-2008 Terence Parr
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# modification, are permitted provided that the following conditions
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try:
    set = set
    frozenset = frozenset
except NameError:
    from sets import Set as set, ImmutableSet as frozenset


try:
    reversed = reversed
except NameError:
    def reversed(l):
        l = l[:]
        l.reverse()
        return l