Untitled

# -*- coding: utf-8 -*-
#server.py
import http.server
import socketserver
import sys
import time
import cgi
import urllib
import os

PORT = 80

esl = "n"
sl = "-->"

def logthis(*args):
    print(esl)
    print(sl, "----------",     esl)
    for i in args:
        print(sl, i, esl)
    print(sl, ">----------<",   esl)

class Handler(http.server.BaseHTTPRequestHandler):
    def do_GET(self):
        logthis(    self.command,
                self.client_address,
                self.path,
                self.address_string(),
                self.protocol_version)

        self.send_response(200,'OK')
        self.send_header('content-type','text/html')
        self.end_headers()
        if self.path == "/":
            f = open("index.html")
            self.wfile.write(f.read().encode("utf-8"))
            f.close()
        else:
            self.wfile.write("no !".encode("utf-8"))

        return

    def do_POST(self):
        if self.path:
            length = int(self.headers['Content-Length'])
            post_data = urllib.parse.parse_qs(self.rfile.read(length).decode('utf-8'))

            logthis(post_data)

            self.send_response(200, 'OK')
            self.send_header('Content-type', 'text/html')
            self.end_headers()
            self.wfile.write("<html><head><title>POST</title><head><body>начало{".encode("utf-8"))

            self.wfile.write("}конец</body></html>".encode("utf-8"))

        return


httpd = socketserver.TCPServer(("", PORT), Handler)

os.system('cls')
print("serving at port", PORT)
httpd.serve_forever()

<form action="/" method="post">
        <input type="text" id="in" value=""/>
        <input type="submit" id="btn" value="Жми!"/>
    </form>
    </body>
</html>