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  1. while True:
  2.     cpf = input('Digite os nove primeiros dígitos do CPF: ')
  3.     if len(cpf) == 9:
  4.         break
  5.     #mais código aqui
  6.  
  7. #http://pt.stackoverflow.com/q/187587/101
Success #stdin #stdout 0.03s 9608KB
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Digite os nove primeiros dígitos do CPF: Digite os nove primeiros dígitos do CPF:
https://ideone.com/b9Koie
language:
Python 3 (python  3.9.5)
created:
1 year ago
visibility:
public

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