code: def price_insert_filter(price_dict):
      
      if not isinstance(price_dict, dict):
          raise TypeError("dict_list is not a list. Please try again")
      required = ["period", "exchange", "open", "close", "high", "low", "volumefrom", "volumeto"]
  
      pkeys = price_dict.keys()
      for r in required:
          if r not in pkeys:
              raise KeyError("An important key is not available")
      return True
docs: Price has a set of requirements:
              - period -> [minute, hour, day]
              - exchange
              - open
              - close
              - high
              - low
              - volumefrom
              - volumeto
          Ensure that we have all of them for inserts. Will