Python if_then примеры использования

Пример #1

        def create():
            def condition():
                raise Exception(ex)

            return reactivex.if_then(condition, xs, ys)

Пример #2

 def create():
     return reactivex.if_then(lambda: True, xs, ys)

Пример #3

        def create():
            def condition():
                return b[0]

            return reactivex.if_then(condition, xs)