code: def get_OHLCV(self, ticker, date=None, date_from=None, date_to=None):
          
          data, meta = self.fetch(ticker + "~OHLCV", None, date,
                                  date_from, date_to, 'D', only_data=False)
          return data
docs: Get Open, High, Low, Close prices and daily Volume for a given ticker.
  
             ticker  - ticker or symbol
             date    - date for a single-date query
             date_from, date_to - date range (used only if "date" is not specified)
  
             Returns pandas.Dataframe with data. If error occurs, then it is printed as
             a warning.