code that would identify the identical rows
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Hello! I have a text file (.txt) consisting of 'M' rows and 3 columns. I would like to write a code that allows to identify the identical rows (the highlighted rows) and keep only one copy, of each repeated row, within the text file.
As a result, if a row repeats one or more times, I have to recreate the text file (.txt):
- keeping the lines that do not repeat
- bringing back only once the lines that are repeated
I thank you if anyone can help me!