Ping a server (example google) to check for internet consistency. (for windows only)

ping.py

import subprocess
from time import sleep

hostname = "74.125.24.106"
host_desc = "Google"
amount = 10
time_unstable = 40
time_very_unstable = 100
time_missing = 1000

def ping() -> int:
    p = subprocess.Popen(["ping.exe","-n", "1", hostname],
                         stdout=subprocess.PIPE,
                         shell=True)
    
    response = p.communicate()[0]
    for s in response.split():
        if s[:5] == b'time=':
            response_time = int(s[5:-2])
            return response_time
    return -1

def avg_ping(response_list):
    total = 0
    for x in response_list:
        if x != -1:
            total += x
        else:
            total += time_missing
    return total / len(response_list)

def ping_status(avg):
    if avg >= time_very_unstable or avg == -1:
        status = "VERY UNSTABLE"
    elif avg >= time_unstable:
        status = "unstable"
    else:
        status = "stable"
    return status

def main():
    response_list = []
    print("Pinging", hostname, ":", host_desc, "\n")
    print("{} {:<7} {:<7} {}".format("s", "current", "average", "status"))
    while True:
        current_time = ping()
        response_list.append(current_time)
        response_list = response_list[-amount:]

        if current_time == -1:
            s = "M"
        elif current_time > time_unstable:
            s = "!"
        else:
            s = " "
        
        avg = avg_ping(response_list)
        print("{} {:>7.2f} {:>7.2f} {}".format(
            s, current_time, avg, ping_status(avg)))

        sleep(1)

if __name__ == "__main__":
    try:
        main()
    except KeyboardInterrupt:
        print("KeyboardInterrupt")