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  1. def choose_lang():
  2.     lang = None # NOTE: this `lang` has nothing to do with the global `lang`
  3.     while True: 
  4.         try:
  5.             lang = int(input("select (1 or 2)"))
  6.         except ValueError:
  7.             pass
  8.         if lang not in [1, 2]:
  9.             print("\ntry again")
  10.         else:
  11.             break
  12.     return lang
  13.  
  14. lang = choose_lang()
  15. c = 2 + lang
  16. print(c)
Success #stdin #stdout 0.02s 5748KB
comments (?)
stdin
copy 
not one or two
3
2
1
stdout
copy 
select (1 or 2)
try again
select (1 or 2)
try again
select (1 or 2)4
https://ideone.com/KmqNRg
language:
Python 3 (python  3.9.5)
created:
11 years ago
visibility:
secret

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