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  1. # coding=utf8
  2.  
  3. import re
  4.  
  5. regex = r"^(.*)\r?\n\s*\r?\nfrom:.*\r?\nsent:.*\r?\nto:.*\r?\nsubject:"
  6.  
  7. test_str = ("Hello World from: the other side of the first email\n\n"
  8. 	"from: this\n"
  9. 	"sent: at\n"
  10. 	"to: that\n"
  11. 	"subject: what\n\n"
  12. 	"second email\n\n"
  13. 	"from: this\n"
  14. 	"sent: at\n"
  15. 	"to: that\n"
  16. 	"subject: what\n\n\n"
  17. 	"third email\n\n"
  18. 	"from: this\n"
  19. 	"date: at\n"
  20. 	"to: that\n"
  21. 	"subject: what\n\n"
  22. 	"fourth email")
  23.  
  24. matches = re.search(regex, test_str, re.MULTILINE)
  25.  
  26. if matches:
  27.     print (matches.group(1))
Success #stdin #stdout 0.02s 9468KB
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Standard input is empty
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Hello World from: the other side of the first email
https://ideone.com/iEdbqO
language:
Python 3 (python  3.12)
created:
6 years ago
visibility:
public

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