How to filter only printable characters in a file on Bash (linux) or Python?

Question

I want to make a file including non-printable characters to just only include printable characters. I think this problem is related to ACSCII control action, but I could not

Answer 1

Minimalistic solution comes to my mind is

import string
printable_string = filter(lambda x: x in string.printable, your_string)
## TODO: substitute your string in the place of "your_string"

If still this doesn't help then try also including uni-code specific [curses.ascii]