For consistency with NumPy, it would be nice to allow passing a CuPy array (or perhaps an ndarray-like object) as the repeats= argument to cupy.repeat.

I can do the following with NumPy:

import numpy as np
np.repeat(a=np.arange(3), repeats=np.array([2,2,2]))
array([0, 0, 1, 1, 2, 2])

But the analogous action is not implemented for CuPy:

It's required to be an integer, list, or tuple.