Ardunio analog pin is not attached sensor read value problem

sensor_read.py

#!/usr/bin/env python3

# Using python package : https://pypi.org/project/pyFirmata/


from pyfirmata import Arduino, util

board = Arduino("/dev/ttyACM0")
it = util.Iterator(board)
it.start()


temp_sensor = board.get_pin("a:1:i")


def read_status_analog_pin(pin, counter: int = 10) -> float:
    pin.enable_reporting()

    read_list = []
    for _ in range(counter):
        read_list.append(pin.read())
        board.pass_time(1)

    pin.disable_reporting()

    result = round(sum(read_list) / len(read_list), 4)
    return result


if __name__ == "__main__":
    print(read_status_analog_pin(temp_sensor))


# ! # Read list
# 0.1697
# 0.1697
# 0.234
# 0.234
# 0.2664
# 0.2664
# 0.2661
# 0.2661
# 0.2679
# 0.2679
# 0.2694
# 0.2694
# 0.2693
# 0.2693
# 0.2683
# 0.2683