update README.md

README.md

@@ -21,21 +21,19 @@ Create ZK object and you will ready to call api.
 import zk
 from zk import const
 
+conn = False
 zk = zk.ZK(ip='192.168.1.201', port=4370, timeout=5)
 try:
-    response = zk.connect()
-    if response.get('status') is False:
-        raise Exception(response.get('message'))
+    conn = zk.connect()
 
     # disable (lock) the device, make sure no activity when process run
     zk.disable_device()
 
     # Do another task here
-    firmware = zk.get_firmware_version()
-    print 'Firmware Version: : {}'.format(firmware.get('data'))
+    firmware_version = zk.get_firmware_version()
+    print 'Firmware Version: : {}'.format(firmware_version)
     users = zk.get_users()
-    if users.get('status'):
-        for user in users.get('data'):
+    for user in users:
         privilege = 'User'
         if user.privilege == const.USER_ADMIN:
             privilege = 'Admin'
@@ -52,7 +50,7 @@ try:
 except Exception, e:
     print "Process terminate : {}".format(e)
 finally:
-    if zk.is_connect:
+    if conn:
         zk.disconnect()
 
 ```