Using Numpy, write an array coding function (Run-Length Encoding). The function of repetition of elements compresses the function into one element and considers the number of repetitions. The function returns a motorcade of two Numpy veins of the same length. The first contains elements, and the second - how many times they need to be repeated.

import numpy as np
def encode(a):
    a = np.array(a)
    b = np.array(np.diff(a))
    c = np.zeros(len(a))
    c[0] = a[0]
    if(len(a)==1):
        return [a[0]], [1]
    else:
        for i in range(len(a)-1):
            if b[i] == 0:
                c[i+1] = 0
            else:
                c[i+1] = a[i+1]
        d = np.unique(c, return_counts=True)
        return d[0], d[1]

print(encode([1, 1, 1, 2, 2, 2, 1, 1, 1, 2, 2, 2, 1, 1, 1, 2, 2, 2]))