python计算时间间隔

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from datetime import datetime

if __name__ == '__main__':
    s = '2018-05-01 11:58:24.480819'
    s1 = '2018-05-02 09:13:33.145445'
    a = datetime.strptime(s, '%Y-%m-%d %H:%M:%S.%f')
    b = datetime.strptime(s1, '%Y-%m-%d %H:%M:%S.%f')
    print((b - a).total_seconds()) # 注意total_seconds()的seconds的区别