from http.server import BaseHTTPRequestHandler class handler(BaseHTTPRequestHandler): def do_GET(self): self.send_response(200) self.send_header('content-type', 'text/plain') self.send_header('set-cookie', 'one=first') self.send_header('set-cookie', 'two=second') self.end_headers() self.wfile.write('handler:RANDOMNESS_PLACEHOLDER'.encode()) return