Derive public key from private key

priv_pub.py

    # Reference - https://stackoverflow.com/a/53488466 
    # pre req with python3
    # pip3 install ecdsa
    # pip3 install pysha3 # sha3 won't work
    
    from ecdsa import SigningKey, SECP256k1
    import sha3, random, binascii

    private_key = "<some private key in hex string>"
    private_key = bytes(private_key, 'utf-8')
    private_key = binascii.unhexlify(private_key)
    priv = SigningKey.from_string(private_key, curve=SECP256k1)
    pub = priv.get_verifying_key().to_string() # This will be an uncompressed key
    pub_compressed = priv.get_verifying_key().to_string('compressed') # This will be an compressed key
    keccak = sha3.keccak_256()
    keccak.update(pub)
    address = keccak.hexdigest()[24:]
    print(address, priv.to_string().hex())
    
    print(pub.hex()) # uncompressed key
    print(pub_compressed.hex()) # compressed key
    
    
    # sign message
    msg = b"message"
    signature = priv.sign(msg).hex() # print hex
    print(signature)