Amazing-Python-Scripts

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import tkinter as tk
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import tkinter.font as TkFont
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from datetime import datetime
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def timer():
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    global work
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    if work:
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        now = str(txt_var.get())
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        m, s = map(int, now.split(":"))
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        m = int(m)
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        s = int(s)
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        if (s < 59):
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            s += 1
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        elif (s == 59):
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            s = 0
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            if (m < 59):
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                m += 1
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            elif (m == 59):
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                m = 0
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        if (m < 10):
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            m = str(0)+str(m)
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        else:
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            m = str(m)
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        if (s < 10):
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            s = str(0)+str(s)
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        else:
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            s = str(s)
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        now = m+":"+s
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        txt_var.set(now)
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        if work:
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            root.after(1000, timer)
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# start function
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def start():
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    global work
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    if not work:
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        work = True
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        timer()
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# stop function
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def pause():
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    global work
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    work = False
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# reset function
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def reset():
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    global work
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    if not work:
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        txt_var.set('0:00')
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if __name__ == "__main__":
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    work = False
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    root = tk.Tk()
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    root.geometry("500x221")  # width x height
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    root.title("My StopWatch")
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    txt_var = tk.StringVar()
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    txt_var.set('0:00')  # initial display of string
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    root.config(background="lavender")
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    fontstyle = TkFont.Font(family="Helvetica", size=60,)
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    tk.Label(root, textvariable=txt_var, font=fontstyle,).pack()
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    # creating the buttons for start,stop and reset
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    T = tk.Text(root, height=0.7, width=9)
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    T.pack()
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    T.insert(tk.END, " mm : ss ")
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    tk.Button(root, text="Start", command=start,
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              bg='misty rose').pack(fill='x')
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    tk.Button(root, text='Pause', command=pause,
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              bg='misty rose').pack(fill='x')
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    tk.Button(root, text='Reset', command=reset,
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              bg='misty rose').pack(fill='x')
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    tk.Button(root, text='Exit', command=root.destroy,
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              bg='misty rose').pack(fill='x')
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    root.mainloop()
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