Student ID card reader using Python2 & nfcpy

dump.py

#!/usr/bin/env python2

import nfc

def on_connect(tag):
    print '\n'.join(tag.dump())

with nfc.ContactlessFrontend('usb') as clf:
    clf.connect(rdwr={'on-connect': on_connect})

idreader-test.py

#!/usr/bin/env python2
from idreader import IDReader

def printid(studentid, afrom, ato):
    print("ID: " + studentid)
    print("from: " + afrom + ", to: " + ato)

idr = IDReader(printid)
idr.read()

idreader.py

#!/usr/bin/env python2

import nfc

class IDReader:
    callback = None

    def __init__(self, cbfunc):
        self.callback = cbfunc

    def on_connect(self, tag):
        try:
            sc1 = nfc.tag.tt3.ServiceCode(4, 0x010B)
            bc1 = nfc.tag.tt3.BlockCode(0, service=0)
            data = tag.read_without_encryption([sc1], [bc1])
            studentid = data[3:10]
            bc1 = nfc.tag.tt3.BlockCode(1, service=0)
            data = tag.read_without_encryption([sc1], [bc1])
            afrom = data[0:8]
            ato = data[8:16]
            self.callback(studentid, afrom, ato)
        except nfc.tag.TagCommandError as e:
            print("NFC tag read error")

    def read(self):
        with nfc.ContactlessFrontend('usb') as clf:
            clf.connect(rdwr={'on-connect': self.on_connect})

show_student_id.py

#!/usr/bin/env python2

import nfc

def on_connect(tag):
    try:
        sc1 = nfc.tag.tt3.ServiceCode(4, 0x010B)
        bc1 = nfc.tag.tt3.BlockCode(0, service=0)
        data = tag.read_without_encryption([sc1], [bc1])
        print "ID: " + data[3:10]
        bc1 = nfc.tag.tt3.BlockCode(1, service=0)
        data = tag.read_without_encryption([sc1], [bc1])
        print "from: " + data[0:8] + ", to: " + data[8:16]
    except nfc.tag.TagCommandError as e:
        print("NFC tag read error")

def main():
    with nfc.ContactlessFrontend('usb') as clf:
        clf.connect(rdwr={'on-connect': on_connect})

if __name__ == '__main__':
    main()