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  1. def do():
  2. 	MAX = 100
  3. 	i = 0
  4.  
  5. 	def run():
  6. 		if (i > MAX):
  7. 			print("Done")
  8. 			return None
  9. 		else:
  10. 			print(i)
  11. 			i += 1
  12. 			from time import sleep
  13. 			sleep(0.1)
  14. 			run()
  15.  
  16. 	run()
  17.  
  18. do()
Runtime error #stdin #stdout #stderr 0.04s 9232KB
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Standard input is empty
stdout
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Standard output is empty
stderr
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Traceback (most recent call last):
  File "./prog.py", line 18, in <module>
  File "./prog.py", line 16, in do
  File "./prog.py", line 6, in run
UnboundLocalError: local variable 'i' referenced before assignment
https://ideone.com/llg110
demo outer scope
language:
Python 3 (python  3.9.5)
created:
5 years ago
visibility:
secret

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