Python3 class to ping a Minecraft server and get its response including ping in ms

statusping.py

#!/usr/bin/python3
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import socket
import struct
import json
import time

class StatusPing:
    """ Get the ping status for the Minecraft server """

    def __init__(self, host='localhost', port=25565, timeout=5):
        """ Init the hostname and the port """
        self._host = host
        self._port = port
        self._timeout = timeout

    def _unpack_varint(self, sock):
        """ Unpack the varint """
        data = 0
        for i in range(5):
            ordinal = sock.recv(1)

            if len(ordinal) == 0:
                break

            byte = ord(ordinal)
            data |= (byte & 0x7F) << 7*i

            if not byte & 0x80:
                break

        return data

    def _pack_varint(self, data):
        """ Pack the var int """
        ordinal = b''

        while True:
            byte = data & 0x7F
            data >>= 7
            ordinal += struct.pack('B', byte | (0x80 if data > 0 else 0))

            if data == 0:
                break

        return ordinal

    def _pack_data(self, data):
        """ Page the data """
        if type(data) is str:
            data = data.encode('utf8')
            return self._pack_varint(len(data)) + data
        elif type(data) is int:
            return struct.pack('H', data)
        elif type(data) is float:
            return struct.pack('L', int(data))
        else:
            return data

    def _send_data(self, connection, *args):
        """ Send the data on the connection """
        data = b''

        for arg in args:
            data += self._pack_data(arg)

        connection.send(self._pack_varint(len(data)) + data)

    def _read_fully(self, connection, extra_varint=False):
        """ Read the connection and return the bytes """
        packet_length = self._unpack_varint(connection)
        packet_id = self._unpack_varint(connection)
        byte = b''

        if extra_varint:
            # Packet contained netty header offset for this
            if packet_id > packet_length:
                self._unpack_varint(connection)

            extra_length = self._unpack_varint(connection)

            while len(byte) < extra_length:
                byte += connection.recv(extra_length)

        else:
            byte = connection.recv(packet_length)

        return byte

    def get_status(self):
        """ Get the status response """
        with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as connection:
            connection.settimeout(self._timeout)
            connection.connect((self._host, self._port))

            # Send handshake + status request
            self._send_data(connection, b'\x00\x00', self._host, self._port, b'\x01')
            self._send_data(connection, b'\x00')

            # Read response, offset for string length
            data = self._read_fully(connection, extra_varint=True)

            # Send and read unix time
            self._send_data(connection, b'\x01', time.time() * 1000)
            unix = self._read_fully(connection)

        # Load json and return
        response = json.loads(data.decode('utf8'))
        response['ping'] = int(time.time() * 1000) - struct.unpack('L', unix)[0]

        return response

why??

There's no __repr__... you need to call status_ping.get_status(). Also btw, I'd suggest using mcstatus instead of this snippet since it's more complete and supports some other neat things too. But if you just want something minimal to purely just get the ping response, this is great!