Create an instance of the own class from a pymatgen molecule

        Args:
            molecule (:class:`pymatgen.core.structure.Molecule`):

        Returns:
            Cartesian:

def from_pymatgen_molecule(cls, molecule):
        """Create an instance of the own class from a pymatgen molecule

        Args:
            molecule (:class:`pymatgen.core.structure.Molecule`):

        Returns:
            Cartesian:
        """
        new = cls(atoms=[el.value for el in molecule.species],
                  coords=molecule.cart_coords)
        return new._to_numeric()