Answer by pitfall for Python int to binary string?

Using numpy pack/unpackbits, they are your best friends.

Examples-------->>> a = np.array([[2], [7], [23]], dtype=np.uint8)>>> aarray([[ 2],       [ 7],       [23]], dtype=uint8)>>> b = np.unpackbits(a, axis=1)>>> barray([[0, 0, 0, 0, 0, 0, 1, 0],       [0, 0, 0, 0, 0, 1, 1, 1],       [0, 0, 0, 1, 0, 1, 1, 1]], dtype=uint8)