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  1. while True:
  2. try:
  3. #print('Please enter a number') #
  4. input = int(raw_input())
  5. except ValueError:
  6. #print('Error: only numbers are accepted')
  7. continue
  8. if input == 42:
  9. break
  10. print(input)
  11.  
Success #stdin #stdout 0.02s 4680KB
stdin
2
8
4
2

6
8
4
2
42
stdout
2
8
4
2
6
8
4
2