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How to compare two time points in python? Let me explain the specific steps below:
1. Convert string to datetime
#字符串转datetime dt = datetime.datetime.strptime('2017-04-19 00:42:44','%Y-%m-%d %H:%M:%S')
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2. Convert datetime to string
#datetime转字符串 str = dt.strftime("%Y-%m-%d-%H")
3.Comparison of datetime
>>> dt1 = datetime.datetime.strptime('2017-04-18 00:40:00','%Y-%m-%d %H:%M:%S') >>> dt2 = datetime.datetime.strptime('2017-04-18 00:20:00','%Y-%m-%d %H:%M:%S') >>> print(dt1 - dt2) 0:20:00 >>> print(dt2 - dt1) -1 day, 23:40:00
It can be seen that when subtracting a larger time from a smaller time, the result is -1 Day, 23:40. Instead of -20 points.
4. Judgment of datetime comparison results
>>> diff = dt2 - dt1 >>> print(diff) -1 day, 23:40:00 >>> print(diff.days) -1 >>> print(diff.seconds) 85200
That is, diff.days should be used for comparison. If it is less than 0, the former is smaller.
5. The specific difference in seconds
>>> diff.days * 86400 + diff.seconds -1200
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