fork download 
  1. import re
  2. def string_match1(tested_string):
  3.     return re.fullmatch(r"(?!(?:\S*\s){2})[A-Za-z0-9\s!#$%&'()@_{}-]*", tested_string)
  4.  
  5. def string_match2(tested_string):
  6.     return re.match(r"[A-Za-z0-9!#$%&'()@_{}-]*(?: [A-Za-z0-9!#$%&'()@_{}-]*)?$", tested_string)
  7.  
  8. print(bool(string_match1("b ")))
  9. print(bool(string_match2("b ")))
  10. print(bool(string_match1("b  ")))
  11. print(bool(string_match2("b  ")))
Success #stdin #stdout 0.02s 9468KB
comments (?)
stdin 
Standard input is empty
stdout 
True
True
False
False
https://ideone.com/e7AJLI
language:
Python 3 (python  3.12)
created:
6 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!