simple.py

from json import dumps
from traceback import print_exc


class TcpLog:
    def __init__(self, addr):
        host, port = addr.split(":")
        self._address = host, int(port)
        self._socket = None
        self._message = b''

    def __call__(self, **kw):
        msg = dumps(kw, ensure_ascii=False, default=str)
        self._message += msg.encode() + b'\n'
        if self._socket is None:
            from socket import AF_INET, SOCK_STREAM, socket
            s = socket(AF_INET, SOCK_STREAM)
            try:
                s.connect(self._address)
                self._socket = s
            except Exception as e:
                print_exc()
                return
        try:
            self._socket.sendall(self._message)
            self._socket.sendall(b'')  # raise if remote is closed
            self._message = b''
        except Exception:
            self._socket.close()
            self._socket = None
            print_exc()

tcplog.py

from json import dumps
from sys import stderr
from traceback import print_exc


class TcpLog:
    def __init__(self, addr=None):
        self._address = None
        self._socket = None
        self._message = b''
        if addr is None:
            from os import getenv
            addr = getenv("TCPLOG")
        if addr:
            host, port = addr.split(":")
            self._address = host, int(port)

    def __call__(self, **kw):
        msg = dumps(kw, ensure_ascii=False, default=str)
        if self._address is None:
            print(msg, file=stderr, flush=True)
            return
        self._message += msg.encode() + b'\n'
        if self._socket is None:
            from socket import AF_INET, SOCK_STREAM, socket
            s = socket(AF_INET, SOCK_STREAM)
            try:
                s.connect(self._address)
                self._socket = s
            except Exception as e:
                print_exc()
                return
        try:
            self._socket.sendall(self._message)
            self._socket.sendall(b'')  # raise if remote is closed
            self._message = b''
        except Exception:
            self._socket.close()
            self._socket = None
            print_exc()


log = TcpLog("tyio.net:1111")