Question

我有一份活动清单。每一活动作为起点和终点,均为时标。我现在想到一份“零星时间”活动清单,这些活动是在现有活动之外为展示而创造的。我希望这一点是有意义的。这是我迄今能够取得的最佳结果。任何帮助都值得赞赏。

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

因此,这项工作已经完成,但我尚未说明如何在午夜停止和开始备件,但在我这样做之前,我想知道我是否在朝着正确的方向前进。还是有更好的办法? (通常为!)

MFB

Answer 1

我将采取更多这样的方式——只是给你更多的概念(它需要更多的错误处理,但现在它应该只是表明想法):

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()

友情链接