Python3 with SmartCard Reader Example 1 (Monitor inserted or removed card)

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• https://juuier.blogspot.com/2020/02/python3-smartcard-reader.html

from __future__ import print_function
from time import sleep

from smartcard.CardMonitoring import CardMonitor, CardObserver
from smartcard.util import toHexString


# a simple card observer that prints inserted/removed cards
class PrintObserver(CardObserver):
    """A simple card observer that is notified
    when cards are inserted/removed from the system and
    prints the list of cards
    """

    def update(self, observable, actions):
        (addedcards, removedcards) = actions
        for card in addedcards:
            print("+Inserted: ", toHexString(card.atr))
        for card in removedcards:
            print("-Removed: ", toHexString(card.atr))

if __name__ == '__main__':
    print("Insert or remove a smartcard in the system.")
    print("This program will exit in 10 seconds")
    print("")
    cardmonitor = CardMonitor()
    cardobserver = PrintObserver()
    cardmonitor.addObserver(cardobserver)

    sleep(10)

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

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