attendance.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import sys, time, random
import nfc
import pprint
#import requests
import binascii

usbid = 'usb:054c:06c3'
servcode = 0x110B

class StudentIDReader(object):
	def on_connect(self, tag):
		print "touched"
		service_code = [nfc.tag.tt3.ServiceCode(servcode >> 6, servcode & 0x3f)]
		students_id = [nfc.tag.tt3.BlockCode(i) for i in range(1, 2)]
		result_id = tag.read_without_encryption(service_code, students_id)
		self.res_id = int(result_id[0:8])

	def read_id(self):
		print "read"
		try:
			clf = nfc.ContactlessFrontend(usbid)
		except IOError as error:
			sys.stderr.write("no device found")
			return 3

		try:
			clf.connect(rdwr={'on-connect': self.on_connect})
		finally:
			clf.close()

def main():
	cr = StudentIDReader()
	previd = 0

	while True:
		print "touch card:"
		try:
			cr.read_id()
		finally:
			print "unknown error"
			sys.exit()

		print "release"
		if cr.res_id != previd:
			print cr.res_id
			previd = cr.res_id

if __name__ == '__main__':
	main()

meibo.py

# -*- coding: utf-8 -*-

import datetime
import sqlite3

class MeiboDB(object):
	def __init__(self):
		self.filename = "meibo_%s.sqlite3" % str(datetime.date.today())
		self.conn = sqlite3.connect(self.filename)

	def filename(self):
		print self.filename

	def close(self):
		self.conn.close()

def main():
	db = MeiboDB()
	print "create database: %s" % db.filename
	db.close

if __name__ == '__main__':
	main()