print currently connected OpenVPN clients to console

openvpn_clients.py

#!/usr/bin/env python3

from telnetlib import Telnet
import telnetlib
import re

# openvpn managment address and port
HOST = "localhost"
PORT = 9969


class ClientInfo:
    def __init__(self, name, real_address, received, sent, connected_since):
        self.name = name
        self.real_address = real_address
        self.received = received
        self.sent = sent
        self.connected_since = connected_since

    def __iter__(self):
        return iter((self.name, self.real_address, self.received, self.sent, self.connected_since))

    def __str__(self):
        string = ""
        for item in self:
            string += str(item) + " "

        return string


def read_openvpn_status_telnet(host, port) -> str:
    STATUS_CMD = "status"
    EXIT_CMD = "exit"

    # telenet to managment port of openvpn
    tn = telnetlib.Telnet(host, port)

    # send status command
    tn.write(STATUS_CMD.encode('ascii') + b"\n")

    # read the reply
    status_reply = tn.read_until(b"END").decode('ascii')

    # send exit command
    tn.write(EXIT_CMD.encode('ascii') + b"\n")

    # close the telenet connetcion
    tn.close()

    return status_reply


def parse_clients_from_status(status_str: str):
    match = re.findall(r"^[^,]+,[^,]+,\d+,\d+,[^(\r\n)]+",
                       status_str, re.MULTILINE)
    clients = []

    for client_str in match:
        params = client_str.split(',')

        client = ClientInfo(params[0], params[1],
                            params[2], params[2], params[4])

        clients.append(client)

    return clients


def openvpn_managment_client_list(host, port):
    openvpn_status = read_openvpn_status_telnet(host, port)
    clients = parse_clients_from_status(openvpn_status)
    return clients


if __name__ == "__main__":
    clients = openvpn_managment_client_list(HOST, PORT)

    print()

    for client in clients:
        print(client)

    print()

The script connets to OpenVPN management port so you need to enable this port in your open vpn server .conf file by adding smthng like this:
management localhost 9969