Merge pull request #48 from akaariai/pull_38_fix

import copy

import operator

from functools import wraps, update_wrapper

import sys

# You can't trivially replace this `functools.partial` because this binds to

        results[predicate(item)].append(item)

    return results

try:

if sys.version_info >= (2,7,2):

    from functools import total_ordering

except ImportError:

    # For Python < 2.7

    # Code borrowed from python 2.7.3 stdlib

else:

    # For Python < 2.7.2. Python 2.6 does not have total_ordering, and

    # total_ordering in 2.7 versions prior to 2.7.2 is buggy. See

    # http://bugs.python.org/issue10042 for details. For these versions use

    # code borrowed from Python 2.7.3.

    def total_ordering(cls):

        """Class decorator that fills in missing ordering methods"""

        convert = {