Test if our ping is good enough to play Rocket League

ping_test.py

import platform
import re
import subprocess
from statistics import mean

def pings(*, url='google.com', count=10):
    if platform.system() == 'Windows':
        flag = '-n'
    else:
        flag = '-c'

    result = subprocess.run(['ping', flag, str(count), url],
                            capture_output=True)
    match = re.findall(r'time=([\d.]+)', str(result.stdout))

    return sorted(float(n) for n in match)

def diagnose(ping):
    # TODO: Packet loss.
    errors = []
    if ping[-1] - ping[0] >= 20:
        errors.append('Latency Variation')
    if ping[-1] >= 100:
        errors.append('High Latency')
    return errors


if __name__ == '__main__':
    ping = pings()
    errors = diagnose(ping)

    print(f'Min = {ping[0]} ms, Max = {ping[-1]} ms, Avg = {mean(ping):.2f} ms')
    if errors:
        print(f"Errors: {', '.join(errors)}")