coding challenge from dropbox

dropbox.py

class Meeting(object):

    def __init__(self, start, end):
        self.start = start
        self.end = end

    def __str__(self):
        return str(self.start) + ', ' + str(self.end)


def schedule(times):
    times.sort(key=lambda m: m.start)
    rooms = [times[0]]
    maxRooms = 1
    for t in times[1:]:
        rooms = [i for i in rooms if i.end > t.start] + [t]
        maxRooms = max(maxRooms, len(rooms))
    return maxRooms


meetingList = [
    Meeting(start=10, end=17),
    Meeting(start=23, end=30),
    Meeting(start=15, end=25),
]

print schedule(meetingList)