Python debug thread

import types
import threading
import socket
import struct
import os

class DebugThread(threading.Thread):

    def __init__(self, host):
        threading.Thread.__init__(self)
        self.m_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.m_socket.setblocking(0)
        self.m_loop = True
        self.m_server_addrs = (host, 6540) #port = 6540, defined in DENNOp
        self.m_msg_type_int = 0
        self.m_msg_type_float = 1
        self.m_msg_type_double = 2
        self.m_msg_type_string = 3

    def run(self):
        #try to connect
        if not self.connection():
            return
        #read message
        while self.m_loop:
            #read
            value = self.read_messages()
            #bad case
            if value is False:
                break
        #close connection
        self.m_socket.shutdown()
        self.m_socket.close()

    def connection(self):
        while self.m_loop:
            err = self.m_socket.connect_ex(self.m_server_addrs)
            if err == 0:
                return True
        return False

    def read_messages(self):
        #read type
        data = self.m_socket.recv(4)
        #if type arrived
        if data != None:
            #data type
            type_of_data = int.from_bytes(bytearray(data), byteorder='little')
            #types
            if type_of_data == self.m_msg_type_int:
                int_data = struct.unpack('<i', bytearray(self.m_socket.recv(4)))
                return int_data
            elif type_of_data == self.m_msg_type_float:
                float_data = struct.unpack('<f', bytearray(self.m_socket.recv(4)))
                return float_data
            elif type_of_data == self.m_msg_type_double:
                double_data = struct.unpack('<d', bytearray(self.m_socket.recv(4)))
                return double_data
            elif type_of_data == self.m_msg_type_string:
                len_data = struct.unpack('<i', bytearray(self.m_socket.recv(4)))
                str_data = bytearray(self.m_socket.recv(len_data)).decode("utf-8")
                return str_data
            else:
                return False
        else:
            return True