Question

我有一系列活动。作为Start和End的每个事件都是datetime对象。我现在想要一个“空闲时间”事件列表，它是根据现有事件创建的，用于显示目的。我希望这是有道理的。到目前为止，这是我能想到的最好的。任何帮助表示赞赏！

class Event():
    Start = datetime.datetime
    End = datetime.datetime
    Reserved = boolean

# create a couple of events with some spare time between them...

ev1 = Event()
ev1.Start = datetime.datetime(2011,1,1,5)
ev1.End = datetime.datetime(2011,1,1,6)
ev1.Reserved = True

ev2 = Event()
ev2.Start = datetime.datetime(2011,1,1,8)
ev2.End = datetime.datetime(2011,1,1,9)
ev2.Reserved = True

events = [ev1,ev2]

# sort the events list...

events.sort(key=lambda e: e.Start)

# create a 'spare time' event based on the existing events...

allevents = []

for event in events:
    spare = Event()
    spare.Start = events[events.index(event)-1].End+datetime.timedelta(seconds=1)
    spare.End = event.Start-datetime.timedelta(seconds=1)
    spare.Reserved = False
    allevents.append(spare)
    allevents.append(event)

allevents.sort(key=lambda e: e.Start)

for event in allevents:
    print str(event.Start), str(event.End), event.Reserved

所以，这有效，但我还没有弄清楚如何在午夜停止和开始业余时间，但在我这样做之前，我想知道我是否正朝着正确的方向前进。还是有更好的方法？（通常有！）..

MFB

Answer 1

我会这样做更多 - 只是为了给你一些更多的概念（它需要更多的错误处理，但现在它应该只显示这个想法）：

from datetime import datetime
class Venue(object):
    """Collection of events"""
    def __init__(self):
        self.events_list = []

    def add_events(self,*args):
        for e in args:
            self.events_list.append(e)

    def sort_list(self):
        self.events_list.sort(key=lambda e: e.start_date)

    def find_spare_times(self):
        self.sort_list()
        for event in self.events_list:
            yield event.start_date
            yield event.end_date

    def add_spare_events(self):
        l = list(self.find_spare_times())
        print l
        new_start,new_end = None, None
        for e in l[1:]:
            if new_start:
                new_end = e
                self.add_events(Event(new_start,new_end,res=False))
                new_start = None
            else:
                new_start = e
                new_end = None

    def get_events(self):
        return self.events_list

class Event(object):
    """Holds the data for an individual event"""
    def __init__(self,start_date, end_date,res=True):
        self.start_date = start_date
        self.end_date = end_date
        self.reserved = res

# create a couple of events with some spare time between them...
def main():
    ev1 = Event(datetime(2011,1,1,5),datetime(2011,1,1,6))
    ev2 = Event(datetime(2011,1,1,8),datetime(2011,1,1,9))

    v = Venue()
    v.add_events(ev1,ev2)
    print v.get_events()
    v.add_spare_events()
    print v.get_events()

if __name__ == "__main__":
    main()

在python datetime对象列表中查找“备用”时间

1 个答案: