python的datetime库实现的秒表程序样例源代码

# Python program to illustrate a stop watch import tkinter as Tkinter from datetime import datetime counter=66600 running=False def counter_label(label): def count(): if running: global counter # To manage the initial delay. if counter==66600: display="Starting..." else: tt=datetime.fromtimestamp(counter) string=tt.strftime("%H:%M:%S") display=string label['text']=display label.after(1000, count) counter+=1 # Triggering the start of the counter. count() # start function of the stopwatch def Start(label): global running running=True counter_label(label) start['state']='disabled' stop['state']='normal' reset['state']='normal' # Stop function of the stopwatch def Stop(): global running start['state']='normal' stop['state']='disabled' reset['state']='normal' running=False # Reset function of the stopwatch def Reset(label): global counter counter=66600 # If rest is pressed after pressing stop. if running == False: reset['state']='disabled' label['text']='Welcome!' # If reset is pressed while the stopwatch is running. else: label['text']='Starting...' root=Tkinter.Tk() root.title("Stopwatch") root.iconbitmap("stopwatch.ico") root.configure(bg="#FFE873") # Fixing the window size. root.minsize(width=250,height=70) label=Tkinter.Label(root,text="Welcome!",fg="#4B8BBE",bg="#FFE873",font="Verdana 30 bold") label.pack() f=Tkinter.Frame(root) start=Tkinter.Button(f,text='Start',width=6,command=lambda:Start(label)) stop=Tkinter.Button(f,text='Stop',width=6,state='disabled',command=Stop) reset=Tkinter.Button(f,text='Reset',width=6,state='disabled',command=lambda:Reset(label)) f.pack(anchor='center',pady=5) start.pack(side="left") stop.pack(side="left") reset.pack(side="left") root.mainloop()