import sys


PY2 = sys.version_info[0] == 2

if PY2:
    text_type = unicode
    int_types = (int, long)
    string_types = (str, unicode)
    range_type = xrange
    itervalues = lambda x: x.itervalues()
    NUL = '\x00'
    def implements_to_string(cls):
        cls.__unicode__ = cls.__str__
        cls.__str__ = lambda x: x.__unicode__().encode('utf-8')
        return cls
else:
    text_type = str
    int_types = (int,)
    string_types = (str,)
    range_type = range
    itervalues = lambda x: x.values()
    NUL = 0
    implements_to_string = lambda x: x