flatten_all

def flatten_all(self):
        """flatten_all"""

        log.info("flattening - START")

        self.all_rows = []

        for idx, r in enumerate(self.all_flat):

            new_row = {"idx": idx}

            for k in self.all_keys_list:
                if k in r:
                    new_row[k] = r[k]
                else:
                    new_row[k] = None
            # end of for all keys

            self.all_rows.append(new_row)

        # end of all_keys

        log.info("flattening - END")