sample_MonitorReaders.py

#! /usr/bin/env python3
"""
Sample script that monitors smartcard readers.

__author__ = "http://www.gemalto.com"

Copyright 2001-2012 gemalto
Author: Jean-Daniel Aussel, mailto:jean-daniel.aussel@gemalto.com

This file is part of pyscard.

pyscard is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

pyscard is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with pyscard; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
"""

from time import sleep

from smartcard.ReaderMonitoring import ReaderMonitor, ReaderObserver


class printobserver(ReaderObserver):
    """A simple reader observer that is notified
    when readers are added/removed from the system and
    prints the list of readers
    """

    def update(self, observable, actions):
        (addedreaders, removedreaders) = actions
        print("Added readers", addedreaders)
        print("Removed readers", removedreaders)

if __name__ == '__main__':
    print("Add or remove a smartcard reader to the system.")
    print("This program will exit in 10 seconds")
    print("")
    readermonitor = ReaderMonitor()
    readerobserver = printobserver()
    readermonitor.addObserver(readerobserver)

    sleep(10)

    # don't forget to remove observer, or the
    # monitor will poll forever...
    readermonitor.deleteObserver(readerobserver)

    import sys
    if 'win32' == sys.platform:
        print('press Enter to continue')
        sys.stdin.read(1)