docstr: normalize data
  
  Parameters
  ----------
  date_field_name: str
      date field name, default date
  symbol_field_name: str
      symbol field name, default symbol
  
  Examples
  ---------
      $ python collector.py normalize_data --source_dir ~/.qlib/fund_data/source/cn_data --normalize_dir ~/.qlib/fund_data/source/cn_1d_nor --region CN --interval 1d --date_field_name FSRQ
docstr_tok: ["normalize","data","Parameters","--","--","--","--","--","date_field_name",":","str","date","field","name",",","default","date","symbol_field_name",":","str","symbol","field","name",",","default","symbol","Examples","--","--","--","--","-","$","python","collector.py","normalize_data","--","source_dir","~\/.qlib\/fund_data\/source\/cn_data","--","normalize_dir","~\/.qlib\/fund_data\/source\/cn_1d_nor","--","region","CN","--","interval","1d","--","date_field_name","FSRQ"]
code: def normalize_data(
      self,
      date_field_name: str = "date",
      symbol_field_name: str = "symbol",
  ):
      """normalize data
  
      Parameters
      ----------
      date_field_name: str
          date field name, default date
      symbol_field_name: str
          symbol field name, default symbol
  
      Examples
      ---------
          $ python collector.py normalize_data --source_dir ~/.qlib/fund_data/source/cn_data --normalize_dir ~/.qlib/fund_data/source/cn_1d_nor --region CN --interval 1d --date_field_name FSRQ
      """
      super(Run, self).normalize_data(
          date_field_name, symbol_field_name
      )
  
imports: import abc
  import sys
  import datetime
  import json
  from abc import ABC
  from pathlib import Path
  import fire
  import requests
  import pandas
  from loguru import logger
  from dateutil.tz import tzlocal
  from qlib.constant import REG_CN
  from data_collector.base import BaseCollector, BaseNormalize, BaseRun
  from data_collector.utils import get_calendar_list, get_en_fund_symbols
label_desc: Use image node_id 6 for calling the Run obj's underlying member method code with example usage: obj.normalize_data(date_field_name, symbol_field_name) without return types