code: def bookDF(symbol=None, token='', version=''):
      '''Book shows IEX’s bids and asks for given symbols.
  
      https://iexcloud.io/docs/api/#deep-book
  
      Args:
          symbol (string); Ticker to request
          token (string); Access token
          version (string); API version
  
      Returns:
          DataFrame: result
      '''
      x = book(symbol, token, version)
      data = []
      for key in x:
          d = x[key]
          d['symbol'] = key
          data.append(d)
      df = pd.io.json.json_normalize(data)
      _toDatetime(df)
      return df bookDF(symbol=None, token='', version=''):
      '''Book shows IEX’s bids and asks for given symbols.
  
      https://iexcloud.io/docs/api/#deep-book
  
      Args:
          symbol (string); Ticker to request
          token (string); Access token
          version (string); API version
  
      Returns:
          DataFrame: result
      '''
      x = book(symbol, token, version)
      data = []
      for key in x:
          d = x[key]
          d['symbol'] = key
          data.append(d)
      df = pd.io.json.json_normalize(data)
      _toDatetime(df)
      return df
docs: Book shows IEX’s bids and asks for given symbols.
  
      https://iexcloud.io/docs/api/#deep-book
  
      Args:
          symbol (string); Ticker to request
          token (string); Access token
          version (string); API version
  
      Returns:
          DataFrame: result