jenkins one at a time hash in python

jenkins_one_at_a_time.py

#!/usr/bin/env python3
import numpy as np

def string_to_byte_array(s : str) -> np.ndarray:
    return np.array([ord(c) for c in s], dtype=np.uint8)

def jenkins_one_at_a_time(bytes: np.ndarray[np.uint8]) -> np.uint32:
    hash = np.uint32(0)
    for byte in bytes:
        hash += np.uint8(byte)
        hash += np.uint32(hash) << np.uint8(10)
        hash ^= np.uint32(hash) >> np.uint8(6)
    hash += np.uint32(hash) << np.uint8(3)
    hash ^= np.uint32(hash) >> np.uint8(11)
    hash += np.uint32(hash) << np.uint8(15)
    return hash


np.seterr(over='ignore')
## Assertions
s1 = "a"
b1 = string_to_byte_array(s1)
a1 = jenkins_one_at_a_time(b1)
assert (a1 == 0xca2e9442)

s2 = "The quick brown fox jumps over the lazy dog"
b2 = string_to_byte_array(s2)
a2 = jenkins_one_at_a_time(b2)
assert (a2 == 0x519e91f5)