code: def get_gas_price(self, is_full: bool = False) -> int or dict:
          
          payload = self.generate_json_rpc_payload(RpcMethod.GET_GAS_PRICE)
          response = self.__post(self.__url, payload)
          if is_full:
              return response
          return response['result']['gasprice']
docs: This interface is used to get the gas price in current network.
  
          Return:
              the value of gas price.