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1
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2 from datetime import time
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3
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4 def __toMicroseconds(time):
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5 result = time.microsecond
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6 result += time.second * 1000000
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7 result += time.minute * 60 * 1000000
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8 result += time.hour * 60 * 60 * 1000000
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9 return result
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10
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11 def timedelta(t1, t2):
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12 """Calculate the difference between to datetime.time objects
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13
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14 The result is returned as a time object as the datetime.timedelta does not provide
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15 the same timeunits (hour, minute etc.) as the time objects that come as input to
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16 this routine.
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17
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18 This method always returns a positive difference, i.e. the order in which the two
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19 time objects are passed does not matter.
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20 """
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21 min = t1
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22 max = t2
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23 if t2 < t1:
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24 min = t2
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25 max = t1
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26
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27 total1 = __toMicroseconds(min)
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28 total2 = __toMicroseconds(max)
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29
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30 difference = total2 - total1
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31
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32 hours = ((difference / 1000000) / 60) / 60
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33 difference -= hours * 60 * 60 * 1000000
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34
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35 minutes = (difference / 1000000) / 60
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36 difference -= minutes * 60 * 1000000
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37
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38 seconds = difference / 1000000
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39 difference -= seconds* 1000000
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40
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41 micro = difference
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42 return time(hour=hours, minute=minutes, second=seconds, microsecond=micro)
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43
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