docs: def btc_script_serialize(_script):
      """
      Given a deserialized script (i.e. an array of Nones, ints, and strings), or an existing script,
      turn it back into a hex script
  
      Based on code from pybitcointools (https://github.com/vbuterin/pybitcointools)
      by Vitalik Buterin
      """
      script = _script
      if encoding.json_is_base(_script, 16):
          # hex-to-bin all hex strings in this script
          script = encoding.json_changebase(_script, lambda x: binascii.unhexlify(x))
  
      # encode each item and return the concatenated list
      return encoding.safe_hexlify( ''.join(map(_btc_script_serialize_unit, script)) )