Use a boolean in a For Loop

I have a Script that sends a Notification to my Phone using ntfy.

It pings a Device and if the Ping responds with an Error, it sends a Notification to my Phone.

for ip in ap_ips:
    try:
        ping3.ping(ip)
        requests.post(ntfy_adress,
                      data=("Das Gerät mit der IP-Adresse " + ip + " ist online.").encode(
                          encoding='utf-8'),
                      headers={
                          "Title": ("Unifi AP ist Online!"),
                      })
    except:
        requests.post(ntfy_adress,
                      data=("Das Gerät mit der IP-Adresse " + ip + " ist nicht mehr erreichbar.").encode(encoding='utf-8'),
                      headers={
                          "Title": ("Unifi AP ist Offline!"),
                          "Tags": "warning"
                      })

The Script is supposed to be running in a infinite Loop.

How do i get the Script to only send a Notification if the Ping Result is diffrent than before?

>Solution :

You have to store between two executions the status. Before your while loop do something like:

status = {}

And then, check that the previous status is not the current one

for ip in ap_ips:
    try:
        ping3.ping(ip)

        if status.get(ip) != "OK":
            requests.post(
                ntfy_adress,
                data=("Das Gerät mit der IP-Adresse " + ip + " ist online.").encode(
                    encoding="utf-8"
                ),
                headers={
                    "Title": ("Unifi AP ist Online!"),
                },
            )
        status[ip] = "OK"

    except:  # You should set explicitly which error type you expect here if ping fails.
        if status.get(ip) != "KO":
            requests.post(
                ntfy_adress,
                data=(
                    "Das Gerät mit der IP-Adresse " + ip + " ist nicht mehr erreichbar."
                ).encode(encoding="utf-8"),
                headers={"Title": ("Unifi AP ist Offline!"), "Tags": "warning"},
            )
        status[ip] = "KO"