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  1. def strip(s):
  2. 	if not len(s):
  3. 		return ''
  4.  
  5. 	s = s.lstrip('0')
  6. 	if not len(s):
  7. 		return '0'
  8.  
  9. 	return s
  10.  
  11. import unittest
  12.  
  13. class Test(unittest.TestCase):
  14. 	def test(self):
  15. 		self.assertEqual(strip('090'), '90')
  16. 		self.assertEqual(strip('0080'), '80')
  17. 		self.assertEqual(strip('123'), '123')
  18. 		self.assertEqual(strip('0'), '0')
  19. 		self.assertEqual(strip('000'), '0')
  20. 		self.assertEqual(strip(''), '')
  21.  
  22. unittest.main()
  23.  
Success #stdin #stdout #stderr 0.03s 11500KB
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Standard input is empty
stdout
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Standard output is empty
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.
----------------------------------------------------------------------
Ran 1 test in 0.000s

OK
https://ideone.com/rm7jwt
language:
Python 3 (python  3.9.5)
created:
4 years ago
visibility:
public

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