Question

我想将if dynamic_tickets:和for ticket in dynamic_tickets:放在一行。我总是会收到语法错误。您有一个想法，如何实现？

def adjust_prices():
    events = Event.objects.filter(status=EventStatus.LIVE)
    active_events = [event for event in events if not event.is_over]

    for active_event in active_events:
        dynamic_tickets = [
            ticket for ticket in active_event.tickets.all() if ticket.dynamic_pricing_activated()
        ]
        if dynamic_tickets:
            for ticket in dynamic_tickets:
                print(ticket)
                print("DO OTHER STUFF")

Answer 1

无需使用'if dynamic_tickets：'，因为当列表'dynamic_tickets'将不为空时，仅执行for循环。只需编写如下代码：

def adjust_prices():
    events = Event.objects.filter(status=EventStatus.LIVE)
    active_events = [event for event in events if not event.is_over]

    for active_event in active_events:
        dynamic_tickets = [
            ticket for ticket in active_event.tickets.all() if 
            ticket.dynamic_pricing_activated()
           ]

        for ticket in dynamic_tickets:
            print(ticket)
            print("DO OTHER STUFF")

Django：for循环和if条件在一行中

1 个答案: