Check if clients are online with ips stored in json [SOLVED]

[ibreeden]

Hi @AlphaInc ,
I understand you have two problems:

1. You need to read a JSON file,
   
2. You need to know if an IP address responds.
   

You dit almost right reading the JSON file, but you missed a detail. Look at the file: it starts with "[" so it is a list. There is one comma, so the list contains two items. The items start with "{" so they are dictionaries. You want the IP-address, and you see these addresses have key "ip".
So to extract these adresses you should do someting like:

import json

with open("clients.json") as f:
    data = json.load(f)
    for i in data:
        print(i["ip"])

Now for the ping(). You could use pythonping, but if I understand the manual right, you need to be superuser to run a script using pythonping. I consider this to be bad practice.
So you need to use the default ping on your computer. On Windows you should execute one ping with "ping /n 1 192.168.1.2". On Linux-like systems you need to use "-c" (count) instead of "/n". So you could define a function like this:

from subprocess import call, DEVNULL
import platform

def ping(host_or_ip: str) -> bool :
    """ping() executes:
    on windows:
        ping /n 1 host_or_ip
    on Linux or Mac:
        ping -c 1 host_or_ip
    Meaning: execute one ping to host_or_ip.
    Returns True if host_or_ip responded,
    else False.
    """
    if platform.system().lower() == "windows":
        countoption = "/n"
    else:
        countoption = "-c"
    return not call(["ping", countoption, "1", host_or_ip],
                    stdout=DEVNULL, stderr=DEVNULL)

Please show us how you use these building blocks to create your program. Let us know if you run into troubles.