.. getthecode:: unpacking.py
    :language: python3
    :hidden:

===========
 Unpacking
===========

This page contains a memo on unpacking.
`PEP 448 - Additional Unpacking Generalizations <https://www.python.org/dev/peps/pep-0448>`_


.. code-block:: py3

    _= *[1], *[2], 3, *[4, 5]
    print(_)

.. code-block:: none

    (1, 2, 3, 4, 5)
    

.. code-block:: py3

    def fn(a, b, c, d):
        print(a, b, c, d)
    
    fn(**{'a': 1, 'c': 3}, **{'b': 2, 'd': 4})

.. code-block:: none

    1 2 3 4
    

.. code-block:: py3

    _ = *range(4), 4
    print(_)
    _ = [*range(4), 4]
    print(_)
    _ = {*range(4), 4, *(5, 6, 7)}
    print(_)
    _ = {'x': 1, **{'y': 2}}
    print(_)

.. code-block:: none

    (0, 1, 2, 3, 4)
    [0, 1, 2, 3, 4]
    {0, 1, 2, 3, 4, 5, 6, 7}
    {'x': 1, 'y': 2}