Traceback (most recent call last):
  File "derive_address.py", line 10, in <module>
    priv = SigningKey.from_string(string=bytes.fromhex(hex_priv_key), curve=SECP256k1)
  File "/home/bbb/.local/lib/python3.8/site-packages/ecdsa/keys.py", line 788, in from_string
    return cls.from_secret_exponent(secexp, curve, hashfunc)
  File "/home/bbb/.local/lib/python3.8/site-packages/ecdsa/keys.py", line 743, in from_secret_exponent
    raise MalformedPointError(
ecdsa.keys.MalformedPointError: Invalid value for secexp, expected integer between 1 and 115792089237316195423570985008687907852837564279074904382605163141518161494337