Returns the bloch vector of a qubit in the state.

        Calculates the bloch vector of the given qubit
        in the state given by self.state_vector(), given that
        self.state_vector() follows the standard Kronecker convention of
        numpy.kron.

        Args:
            qubit: qubit who's bloch vector we want to find.

        Returns:
            A length 3 numpy array representing the qubit's bloch vector.

        Raises:
            ValueError: if the size of the state represents more than 25 qubits.
            IndexError: if index is out of range for the number of qubits
                corresponding to the state.

def bloch_vector_of(self, qubit: ops.Qid) -> np.ndarray:
        """Returns the bloch vector of a qubit in the state.

        Calculates the bloch vector of the given qubit
        in the state given by self.state_vector(), given that
        self.state_vector() follows the standard Kronecker convention of
        numpy.kron.

        Args:
            qubit: qubit who's bloch vector we want to find.

        Returns:
            A length 3 numpy array representing the qubit's bloch vector.

        Raises:
            ValueError: if the size of the state represents more than 25 qubits.
            IndexError: if index is out of range for the number of qubits
                corresponding to the state.
        """
        return bloch_vector_from_state_vector(self.state_vector(),
                                              self.qubit_map[qubit])