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  1. import re, ast
  2.  
  3. timestamp="['08-52-05.173735', '09-01-22.68835', '09-10-34.145061']"
  4. print([re.sub(r'(?<=\.).*$', '', y) for y in ast.literal_eval(timestamp)])
Success #stdin #stdout 0.02s 9940KB
stdin
Standard input is empty
stdout
['08-52-05.', '09-01-22.', '09-10-34.']