pynfc

Install

sudo apt install libclang-dev libfreefare-dev
python3 -m pip install pynfc

Usage

from pynfc import Nfc, Desfire, Timeout
n = Nfc("pn532_uart:/dev/ttyUSB0:115200")
DESFIRE_DEFAULT_KEY = b'\x00' * 8
MIFARE_BLANK_TOKEN = b'\xFF' * 1024 * 4
for target in n.poll():
 try:
 print(target.uid, target.auth(DESFIRE_DEFAULT_KEY if type(target) == Desfire else MIFARE_BLANK_TOKEN))
 except TimeoutException:
 pass

Develop

sudo apt install libfreefare-dev libclang-5.0-dev
git clone https://github.com/BarnabyShearer/pynfc.git
cd pynfc
python3 setup.py develop --user