NFC bulk encoder script

bulk.py

import nfc
import ndef

tags = set()

rec = ndef.UriRecord("https://google.com")

def on_connect(tag):
    if tag.identifier not in tags:
      
        tags.add(tag.identifier)
        fmt = tag.format()
        
        if fmt is None:
            print("Tag cannot be formatted (not supported).")
        elif fmt is False:
            print("Tag failed to be formatted (for some reason).")
        else:
            tag.ndef.records = [rec]

if __name__ == "__main__":
    clf = nfc.ContactlessFrontend()
    if not clf.open('usb'):
        raise RuntimeError("Failed to open NFC device.")

    while True:
        config = {
            'interval': 0.35,
            'on-connect': on_connect
        }
        ret = clf.connect(rdwr=config)
        if ret is None:
            pass
        elif not ret:
            print ("NFC connection terminated due to an exception.")
            break
        else:
            pass
    clf.close()