| import string | |
| def chr_or_question_mark( c ): | |
| if chr(c) in string.printable and c < 128 and c not in ( 0x09, 0x0b, 0x0c ): | |
| return chr(c) | |
| else: | |
| return '?' | |
| char_translation_table = string.maketrans( | |
| ''.join( map( chr, range(0, 256) ) ) | |
| , ''.join( map( chr_or_question_mark, range(0, 256) ) ) | |
| ) |