def get_superset_of_column_names_from_file(json_file_path):
 column_names = set()
 with open(json_file_path) as fin:
  for line in fin:
   line_contents = json.loads(line)
   column_names.update(set(get_column_names(line_contents).keys()))
 return column_names

def get_superset_of_column_names_from_file ( json_file_path ) : column_names = set ( ) with open ( json_file_path ) as fin : for line in fin : line_contents = json . loads ( line ) column_names . update ( set ( get_column_names ( line_contents ) . keys ( ) ) ) return column_names
read in the json dataset file and return the superset of column names .