Help me on Backspace please

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Hi
I am a beginner on Python and have a problem..

I have text file and reading it line by line and there are backspace
characters in it like '\b' or anything you want like "#". I want to
replace these chars. with Backspace action. I mean deleting the
previous char. and the \b char also. and writing all cleaned text to a
file again.

How can I do that.

Thanks..