I just tried this:

    $ python
    >>> import time, datetime
    >>> () + ()
    ()
    >>> "" + ""
    ''
    >>> 0 + 0
    0
    >>> datetime.timedelta() + datetime.timedelta()
    datetime.timedelta(0)
    >>> time.time() + time.time()
    27848327051.323207

Seems like time() + time() is not a TypeError in Python.