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  1. import re
  2. strs = ["GN1RLWFH0546-2020-04-10-18-09-52-563945.txt", "JOHN-DOE-2020-04-10-18-09-52-563946t64.txt", "DESKTOP-OHK45JO-2020-04-09-02-27-11-451975.txt"]
  3. rx = re.compile(r"^.*?(?=-\d+-)")
  4. for s in strs:
  5.   m = rx.search(s)
  6.   if m:
  7.   	print("{} => '{}'".format(s, m.group()))
Success #stdin #stdout 0.02s 9372KB
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GN1RLWFH0546-2020-04-10-18-09-52-563945.txt => 'GN1RLWFH0546'
JOHN-DOE-2020-04-10-18-09-52-563946t64.txt => 'JOHN-DOE'
DESKTOP-OHK45JO-2020-04-09-02-27-11-451975.txt => 'DESKTOP-OHK45JO'
https://ideone.com/FnX2db
language:
Python 3 (python  3.9.5)
created:
4 years ago
visibility:
secret

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