Floyd's algorithm

def floyd(adj: str):
    """
    >>> floyd(open("graaf.in").read())
    [[7, 4, 11, 8], [3, 7, 7, 4], [6, 7, 8, 1], [5, 6, 7, 8]]
    """
    #TODO

def floyddist(adj: str, from, to):
    """
    >>> floyddist(open("graaf.in").read(),0,3)
    8
    """
    #TODO


def floydpath(adj: str, from, to):
    """
    >>> floydpath(open("graaf.in").read(),0,3)
    [0, 1, 3]
    """
    #TODO


if __name__ == '__main__':
    import doctest
    doctest.testmod()