Simplified the implementation of timezone.is_aware/naive.

    """

    Determines if a given datetime.datetime is aware.

    The logic is described in Python's docs:

    The concept is defined in Python's docs:

    http://docs.python.org/library/datetime.html#datetime.tzinfo

    Assuming value.tzinfo is either None or a proper datetime.tzinfo,

    value.utcoffset() implements the appropriate logic.

    """

    return value.tzinfo is not None and value.tzinfo.utcoffset(value) is not None

    return value.utcoffset() is not None

def is_naive(value):

    """

    Determines if a given datetime.datetime is naive.

    The logic is described in Python's docs:

    The concept is defined in Python's docs:

    http://docs.python.org/library/datetime.html#datetime.tzinfo

    Assuming value.tzinfo is either None or a proper datetime.tzinfo,

    value.utcoffset() implements the appropriate logic.

    """

    return value.tzinfo is None or value.tzinfo.utcoffset(value) is None

    return value.utcoffset() is None

def make_aware(value, timezone=None, is_dst=None):