Problems with program and strip()

[RyanMcCarl]

Hi Artyom,

I tried to modify my text de-duplication program, which removes duplicate lines from a text file, to remove whitespace before considering whether a line is a duplicate. I used .strip() to do this. Before adding .strip(), the program was missing some duplicate lines. After adding .strip(), it deleted every line! What went wrong?

Thanks,
Ryan
textdeduplicator.txt

[arwer13]

Hi!
line.strip() doesn't change line, it returns a copy of line with spaces truncated