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  1. import re
  2.  
  3.  
  4. strings = ["5%","%5","5%+3","5%%","333$","2@2","4%4"];
  5.  
  6. for str in strings:
  7. 	match = re.search(r'(?<!\d)[@$%]|[@$%](?!\d)', str)
  8. 	if match: 
  9. 		print(str + ' is not valid')
  10. 	else: 
  11. 		print(str + ' is valid')
Success #stdin #stdout 0.02s 27712KB
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stdin
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Standard input is empty
stdout
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5% is not valid
%5 is not valid
5%+3 is not valid
5%% is not valid
333$ is not valid
2@2 is valid
4%4 is valid
https://ideone.com/quvg9S
language:
Python 3 (python  3.12)
created:
6 years ago
visibility:
public

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