def index(self) -> npt.NDArray[int]:
    'Retrives an array of element indexes.\n\n        Parameters\n        ----------\n\n        Returns\n        -------\n        array-like\n            Array of node indexes.\n        '
    return np.arange(len(self()))
Retrives an array of element indexes.

Parameters
----------

Returns
-------
array-like
    Array of node indexes.
def index(self) -> npt.NDArray[int]:
    'Retrives an array of element indexes.\n\n        Parameters\n        ----------\n\n        Returns\n        -------\n        array-like\n            Array of node indexes.\n        '
    return np.arange(len(self()))