python account identifier from Principal Id

main.py

import hashlib
import base64
import math
import binascii


if __name__ == '__main__':
    principal_id_str = "m7b5y-itxyr-mr2gt-kvadr-2dity-bh3n5-ff7bb-vvm2v-3ftew-5wjtg-2qe"
    subaccount = bytearray(32)
    # principal_id_str = "kb4lg-bqaaa-aaaab-qabfq-cai"
    # principal_id_str = "gmk2m-oiaaa-aaaab-qaaja-cai"
    principal_id_str = principal_id_str.replace('-', '')
    pad_length = math.ceil(len(principal_id_str) / 8) * 8 - len(principal_id_str)
    print(principal_id_str)
    principal_bytes = base64.b32decode(principal_id_str.encode('ascii') + b'=' * pad_length, True, None)
    principal_bytes = principal_bytes[4:] # remove CRC32 checksum bytes
    ADS = b"\x0Aaccount-id"
    h = hashlib.sha224()
    h.update(ADS)
    h.update(principal_bytes)
    print(subaccount)
    h.update(subaccount)

    checksum = binascii.crc32(h.digest())
    checksum_bytes = checksum.to_bytes(4, byteorder='big')

    identifier = checksum_bytes + h.digest()

    print(identifier)



    print('identifier {}'.format(identifier.hex()))