code: def master_key_from_seed(seed):
          
          S = get_bytes(seed)
          I = hmac.new(b"Bitcoin seed", S, hashlib.sha512).digest()
          Il, Ir = I[:32], I[32:]
          parse_Il = int.from_bytes(Il, 'big')
          if parse_Il == 0 or parse_Il >= bitcoin_curve.n:
              raise ValueError("Bad seed, resulting in invalid key!")
  
          return HDPrivateKey(key=parse_Il, chain_code=Ir, index=0, depth=0)
docs: Generates a master key from a provided seed.
  
          Args:
              seed (bytes or str): a string of bytes or a hex string
  
          Returns:
              HDPrivateKey: the master private key.