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  1. import re
  2.  
  3. exp = None
  4. while True:
  5.     exp = input('Введите выражение или введите \'exit\'\n')
  6.     check_exp = re.findall(r'^\d+\s*[\+\-\/\*]{1}\s*\d+$', exp)
  7.     if check_exp:
  8.         print(eval(check_exp[0]))
  9.     elif exp == 'exit':
  10.         break
  11.     else:
  12.         print('Данные некоректны')
  13.         continue
  14.  
Runtime error #stdin #stdout #stderr 0.04s 9520KB
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stdin
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Standard input is empty
stdout
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Введите выражение или введите 'exit'
stderr
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Traceback (most recent call last):
  File "./prog.py", line 5, in <module>
EOFError: EOF when reading a line
https://ideone.com/sknKtv
language:
Python 3 (python  3.9.5)
created:
6 years ago
visibility:
public

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