in callouts/python/extproc/example/e2e_tests/observability_server.py [0:0]
def __init__(self, **kwargs):
super().__init__(**kwargs)
# Use the plaintext port for debugging info.
self.counter_http_server = HTTPServer(('0.0.0.0', 8080), RequestHandler)
counter_http_server_thread = threading.Thread(
target=self.counter_http_server.serve_forever)
counter_http_server_thread.daemon = True
counter_http_server_thread.start()