Pyserial example for receiving multiple values from an arduino

serialTest.py

from time import sleep
import serial ### pip install pyserial:  https://pypi.org/project/pyserial/

# MAKE SURE THE BAUDRATE MATCHES WITH THE ARDUINO (Serial.begin(115200);)
# ser = serial.Serial("/dev/ttyACM0",115200) #Linux
ser = serial.Serial("COM15", 115200)  # Windows
while True:
    #sleep(1)
    # The arduino is doing something like:
    # Serial.print(ax);
    # Serial.print(",");
    # Serial.print(ay);
    # Serial.print(",");
    # Serial.println(az);

    line = ser.readline().decode("ascii").strip()  # read until newline, then convert (decode) the bytearray to a string, and strip the \r\n newline stuff
    lineSplit = line.split(",")  # split the line into a list

    if len(lineSplit) == 3: #A very crude way to check if the data is as expected: did the split result in an array with lenght 3?

        # Parse float values and assign variables from the list:
        ax = float(lineSplit[0])
        ay = float(lineSplit[1])
        az = float(lineSplit[2])
        print(f"X:{ax}, Y:{ay}, Z:{az}")