Practice exam timer

Source file

01 import tkinter
02 import time
03  
04 star=time.time()
05 
06 def gettime(): 
07     elap=time.time()-star# 获取时间差
08     hours=int(elap/3600)
09     minutes = int((elap-hours*3600)/60)
10     seconds The =  int ( ELAP - minutes * 60.0 - hours * 3600 ) 
. 11     var . SET ( ' % 0 2D: % 0 2D: % 0 2D'  % ( hours , minutes , seconds The )) 
12 is     the root . After ( 1000 , getTime ) # call the function itself every 1s acquisition time 
13 is 
14 the root = Tkinter . Tk () 
15the root . title ( 'test timer' ) 
16 the root . Geometry ( '1000x400' ) 
. 17 var = Tkinter . StringVar () 
18 is Tkinter . the Label ( the root , text = 'examination timing' , font = 'Bold Black 50' ). Pack ( Side = 'Top' ); 
. 19 LB = Tkinter . the Label ( the root , textvariable= Var , FG = 'Red' , font = ( "Microsoft elegant black" ,  150 )) # set the font size of the color 
20 is LB . Pack ( Side = 'Top' ) 
21 is #quit button to exit; the Run button to print the results 
22 is Tkinter . the Button ( the root , text = 'exit' , Command = the root . quit ). Pack ( Side = 'left' ) 
23 is Tkinter . the Button(root, text='运行', command=gettime).pack(side='right')
24 root.mainloop()