Python - Algorithm find time slots

Question

Let\'s say today I work from 09:00 to 18:00, I have 3 appointments:

• 10:00 - 10:30
• 12:00 - 13:00
• 15:30 - 17:10

I need to find a

Answer 1

#time_slots.py
from datetime import datetime, timedelta

appointments = [(datetime(2012, 5, 22, 10), datetime(2012, 5, 22, 10, 30)),
                (datetime(2012, 5, 22, 12), datetime(2012, 5, 22, 13)),
                (datetime(2012, 5, 22, 15, 30), datetime(2012, 5, 22, 17, 10))]

hours = (datetime(2012, 5, 22, 9), datetime(2012, 5, 22, 18))

def get_slots(hours, appointments, duration=timedelta(hours=1)):
    slots = sorted([(hours[0], hours[0])] + appointments + [(hours[1], hours[1])])
    for start, end in ((slots[i][1], slots[i+1][0]) for i in range(len(slots)-1)):
        assert start <= end, "Cannot attend all appointments"
        while start + duration <= end:
            print "{:%H:%M} - {:%H:%M}".format(start, start + duration)
            start += duration

if __name__ == "__main__":
    get_slots(hours, appointments)


% python time_slots.py 
09:00 - 10:00
10:30 - 11:30
13:00 - 14:00
14:00 - 15:00