How to modify EVDEV.py to record ASCII characters instead of keystrokes ?

[Dr. Colombes]

I've used EVDEV.py successfully as a keystroke logger on Linux
machines.

How should EVDEV.py be modified to function as an ASCII character
logger?  That is,  to record upper and lower case letters, lower case
"5" and upper case "%" characters, etc.

Shift and Caps Lock key press events are recorded by EVDEV.py, but the
press event of the Shift and Caps Lock keys do not specify which, if
any, of the subsequent keys are to be interpreted as "upper case"
characters.

Thanks for your suggestions.