code: def setup_data(self, input_path):
      print("loading: " + input_path)
  
      new_episode = True
  
      table_file_path = os.path.join(
          input_path, "data", "{}.tables.jsonl".format(self.dt)
      )
      qa_file_path = os.path.join(
          input_path, "data", "{}.jsonl".format(self.dt)
      )
      with PathManager.open(table_file_path) as table_file:
          table_data = [json.loads(jline) for jline in table_file]
          table_data = {table["id"]: table for table in table_data}
  
      with PathManager.open(qa_file_path) as qa_file:
          qa_data = [json.loads(jline) for jline in qa_file]
  
      def parse_into_sql(table, query):
          header = table["header"]
  
          sql_query = "SELECT {agg} {sel} FROM table".format(
              agg=self.agg_ops[query["agg"]], sel=header[query["sel"]]
          )
          if query["conds"]:
              sql_query += " WHERE " + " AND ".join(
                  [
                      "{} {} {}".format(header[i], self.cond_ops[o], v)
                      for i, o, v in query["conds"]
                  ]
              )
          return sql_query
  
      def table_into_context(table):
          header = table["header"]
          if len(header) == 0:
              return "The table has no columns"
          elif len(header) == 1:
              return "The table has column {}".format(header[0])
          else:
              return "The table has column names {} and {}.".format(
                  ", ".join(header[:-1]), header[-1]
              )
  
      for line in qa_data:
          id = line["table_id"]
          question = line["question"]
          table = table_data[id]
  
          context = table_into_context(table)
          sql = parse_into_sql(table, line["sql"])
  
          yield (
              context + "\n" + question,
              [sql],
              None,
              None,
          ), new_episode
  
file_path: ParlAI/parlai/tasks/wikisql/agents.py
imports: from parlai.core.teachers import DialogTeacher
  from parlai.utils.io import PathManager
  from .build import build
  import os
  import json
label_desc: Use image node_id 2 for calling the WikiSQLTeacher obj's underlying member method code with example usage: obj.setup_data(input_path) and returns: sql_query, str, str, str