recursive-iterative py

def foo1(toptr, fromptr, ndim, shape, strides):
    if ndim == 1:
        for i in range(shape[0]):
            toptr[i] = fromptr[i*strides[0]]
    else:
        for i in range(shape[0]):
            temptoptr = toptr[i*shape[1]:]
            tempfromptr = fromptr[i*strides[0]:]
            err = foo1(temptoptr, fromptr, ndim - 1, shape[1:], strides[1:])
            toptr[i*shape[i]:] = temptoptr
            fromptr[i*strides[0]:] = tempfromptr
            if err != 1:
                return err
    return 1