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  1. import time
  2. from tkinter import *
  3.  
  4. class Timer(Tk):
  5.  
  6.     def __init__ (self):
  7.         Tk. __init__(self)
  8.         self.geometry('160x40')
  9.         self.resizable(0,0)
  10.         self.start= round(time.time())
  11.         self.m = Label(self,text='Seconds: ' + str(self.start),fg='green',font=30)
  12.         self.m.place(x=35,y=8)
  13.         time.sleep(1)
  14.         self.tick()
  15.         self.mainloop()
  16.  
  17.     def tick(self):
  18.         self.m.configure(text='Seconds: '+str(round(time.time()-self.start)))
  19.         self.after(1000, self.tick)
  20.  
  21. t = Timer()
Runtime error #stdin #stdout #stderr 0.04s 26088KB
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Standard input is empty
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Standard output is empty
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Traceback (most recent call last):
  File "./prog.py", line 21, in <module>
  File "./prog.py", line 7, in __init__
  File "/usr/lib/python3.4/tkinter/__init__.py", line 1854, in __init__
    self.tk = _tkinter.create(screenName, baseName, className, interactive, wantobjects, useTk, sync, use)
_tkinter.TclError: no display name and no $DISPLAY environment variable
https://ideone.com/zXPjpt
language:
Python 3 (python  3.9.5)
created:
9 years ago
visibility:
public

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