Date and Time
-------------

Utils for handling date and time.

.. py:class:: pydu.dt.timer(path)

    A timer can time how long does calling take as a context manager or decorator.
    If assign ``print_func`` with ``sys.stdout.write``, ``logger.info`` and so on,
    timer will print the spent time.

    timeit = timer(print_func=sys.stdout.write)
    with timeit:
        foo()

    @timeit
    def foo():
        pass

    ``timer.elapsed`` contains the total amount of elapsed
    time of running ``foo``.

    >>> timeit = timer(print_func=sys.stdout.write)
    >>> with timeit:
    ...     os.getcwd()
    Spent time: 1.7881393432617188e-05s