#!/usr/bin/python
from pathlib import Path
from serial import Serial

def main():
    serialport = "/dev/ttyUSB0"
    baudrate = 9600

    if Path(serialport).is_char_device():
        with Serial(serialport, baudrate) as serial:
            serial.write(b'temperature\n')
            print("{:0.1f}°".format(float(serial.readline())))

if __name__ == '__main__':
    main()