new_contents: import json
  import pymysql
  import argparse
  
  def InsertToMySQL(conn, record):
      cursor = conn.cursor()
  
      cursor.execute( "INSERT user values (%s,%s,%s,%s,%s)", [
          record['user_id'], record['name'], record['review_count'],
          record['average_stars'], record['yelping_since']])
     
  def main(fileName):
      conn = pymysql.Connect(host='localhost', user='root', passwd='',charset='utf8', db='yelpdb')
  
      with open(fileName,'r') as f:
          for line in f:
              record = json.loads(line)
              InsertToMySQL(conn, record)
  
      conn.commit()
      conn.close()
  
  if __name__ == '__main__':
  
      parser = argparse.ArgumentParser()
      parser.add_argument("fileName", help="Json file path")
      args = parser.parse_args()
  
      main(args.fileName)
      
subject: add load_user.py