def __init__(self, tz=None):
    '\n        *tz* is a :class:`tzinfo` instance.\n        '
    if (tz is None):
        tz = _get_rc_timezone()
    self.tz = tz
*tz* is a :class:`tzinfo` instance.
def __init__(self, tz=None):
    '\n        \n        '
    if (tz is None):
        tz = _get_rc_timezone()
    self.tz = tz