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stopwatch.py
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stopwatch.py
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import tkinter as Tkinter
from datetime import datetime
counter = 0
running = False
def counter_label(label):
def count():
if running:
global counter
# To manage the intial delay.
if counter == 0:
display = 'Ready!'
else:
tt = datetime.utcfromtimestamp(counter)
string = tt.strftime('%H:%M:%S')
display = string
label['text'] = display
# label.after(arg1, arg2) delays by
# first argument given in milliseconds
# and then calls the function given as second argument.
# Generally like here we need to call the
# function in which it is present repeatedly.
# Delays by 1000ms=1 seconds and call count again.
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 = 0
# If reset is pressed after pressing stop.
if not running:
reset['state'] = 'disabled'
label['text'] = '00:00:00'
# If reset is pressed while the stopwatch is running.
else:
label['text'] = '00:00:00'
root = Tkinter.Tk()
root.title("Stopwatch")
# Fixing the window size.
root.minsize(width=250, height=70)
label = Tkinter.Label(root, text='Ready!', fg='black', 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()