code: def from_dict(cls, data):
          
          fulfillment = data['fulfillment']
          if not isinstance(fulfillment, (Fulfillment, type(None))):
              try:
                  fulfillment = Fulfillment.from_uri(data['fulfillment'])
              except ASN1DecodeError:
                  # TODO Remove as it is legacy code, and simply fall back on
                  # ASN1DecodeError
                  raise InvalidSignature("Fulfillment URI couldn't been parsed")
              except TypeError:
                  # NOTE: See comment about this special case in
                  #       `Input.to_dict`
                  fulfillment = _fulfillment_from_details(data['fulfillment'])
          fulfills = TransactionLink.from_dict(data['fulfills'])
          return cls(fulfillment, data['owners_before'], fulfills)
docs: Transforms a Python dictionary to an Input object.
  
              Note:
                  Optionally, this method can also serialize a Cryptoconditions-
                  Fulfillment that is not yet signed.
  
              Args:
                  data (dict): The Input to be transformed.
  
              Returns:
                  :class:`~bigchaindb.common.transaction.Input`
  
              Raises:
                  InvalidSignature: If an Input's URI couldn't be parsed.