def add_vectors(self, vectors):
if isinstance(vectors[<NUM_LIT:0>], (list, np.ndarray)):<EOL><INDENT>for vec in vectors:<EOL><INDENT>self.vectors.append(vec)<EOL><DEDENT><DEDENT>else:<EOL><INDENT>self.vectors.append(vectors)<EOL><DEDENT>
Add a list of vectors to Bloch sphere.

        Args:
            vectors (array_like):
                Array with vectors of unit length or smaller.