<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def to_regular_array(self, A):
 """ Converts from an array of type `self.dtype` to an array of type `int` with an additional index labeling the tuple indeces. :param np.ndarray A: An `np.array` of type `self.dtype`. :rtype: `np.ndarray` """

        # this could be a static method, but we choose to be consistent with
        # from_regular_array
        return A.view((int, len(A.dtype.names))).reshape(A.shape + (-1,))