def api_get_xy(source, obj=None, keys_method=None, values_method=None):
    """
    get x: y data from an api endpoint

    :returns: `obj`, `obj` tuple
    :param source: either a `str` url or a django view
    :param obj: object to use for x and y vectors
    :param x_method: `list` of `str` method(s) to call on x object
    :param y_method: `list` of `str` method(s) to call on y object
    """
    pass
