时间格式（时、分、秒）运算方式

    from datetime import datetime, time, timedelta
    
    # 定义time1和time2
    Time1 = datetime.strptime('04:55:00', '%H:%M:%S').time()
    Time2 = datetime.strptime('18:50:00', '%H:%M:%S').time()
    
    ok = ''
    if Time1 > Time2:
       ok = '是'
    elif Time1 <= Time2:
    ok = '否'
    else：
    	pass
    print(ok)
    
    
      
      
      
      
      
      
      
      
      
      
      
      
      
      
    

    是
    
    
      
    

    from datetime import time
    
    print(time(7, 0, 0))