Prg2/recur practice

mysum

def mysum(lst):
    """
    >>> mysum([])
    0
    >>> mysum([10])
    10
    >>> mysum([10, 20, 30])
    60
    >>> mysum([1,0,-10,5,9])
    5
    """

    return 0

To test type

python -m doctest mysum.py