code: def add_option(self, K=None, price=None, St=None, kind="call", pos="long"):
          
          kinds = {
              "call": Call,
              "Call": Call,
              "c": Call,
              "C": Call,
              "put": Put,
              "Put": Put,
              "p": Put,
              "P": Put,
          }
          St = self.St if St is None else St
          option = kinds[kind](St=St, K=K, price=price, pos=pos)
          self.options.append(option)
docs: Add an option to the object's `options` container.