*/
    // TODO: why is this public?
    public TeredoInfo(
        @CheckForNull Inet4Address server, @CheckForNull Inet4Address client, int port, int flags) {
      checkArgument(
          (port >= 0) && (port <= 0xffff), "port '%s' is out of range (0 <= port <= 0xffff)", port);
      checkArgument(
          (flags >= 0) && (flags <= 0xffff),
          "flags '%s' is out of range (0 <= flags <= 0xffff)",
          flags);

**Nur ein Prozess** im Server kann an einem bestimmten **Port** einer bestimmten **IP-Adresse** lauschen. Möglicherweise gibt es andere Prozesse, die an anderen Ports dieselbe IP-Adresse abhören, jedoch nur einen für jede Kombination aus IP-Adresse und Port.

TLS (HTTPS) verwendet standardmäßig den spezifischen Port `443`. Das ist also der Port, den wir brauchen.

	)

	ErrPortAlreadyInUse = newErrFn(
		"Port is already in use",
		"Please ensure no other program uses the same address/port",
		"",
	)

	ErrPortAccess = newErrFn(
		"Unable to use specified port",
		"Please ensure MinIO binary has 'cap_net_bind_service=+ep' permissions",

	if err != nil {
		return fmt.Errorf("could not build port forwarder for prometheus: %v", err)
	}

	if err = fw.Start(); err != nil {
		return fmt.Errorf("failure running port forward process: %v", err)
	}

	// Close the forwarder either when we exit or when an this processes is interrupted.
	defer fw.Close()
	dashboard.ClosePortForwarderOnInterrupt(fw)

	log.Debugf("port-forward to prometheus pod ready")

			return err
		}
	} else {
		// Some fields need to be specified when DSN is unspecified
		if m.Port == "" {
			return fmt.Errorf("unspecified port")
		}
		if _, err := strconv.Atoi(m.Port); err != nil {
			return fmt.Errorf("invalid port")
		}
		if m.Database == "" {
			return fmt.Errorf("database unspecified")
		}
	}

	if m.QueueDir != "" {

  }

  @Override public ServerSocket createServerSocket(int port) throws IOException {
    return createServerSocket();
  }

  @Override public ServerSocket createServerSocket(int port, int backlog) throws IOException {
    return createServerSocket();
  }

  @Override public ServerSocket createServerSocket(
      int port, int backlog, InetAddress inetAddress) throws IOException {
    return createServerSocket();

webhooks:
  - admissionReviewVersions:
      - v1beta1
      - v1
    clientConfig:
      service:
        name: istiod
        namespace: istio-system
        path: /inject
        port: 443
    failurePolicy: Fail
    matchPolicy: Equivalent
    name: rev.namespace.sidecar-injector.istio.io
    namespaceSelector:
      matchExpressions:
        - key: istio.io/rev
          operator: In

  # CAP_NET_ADMIN capability, which is required to use TPROXY.
  #interceptionMode: REDIRECT
  #
  # Port where Envoy listens (on local host) for admin commands
  # You can exec into the istio-proxy container in a pod and
  # curl the admin port (curl http://localhost:15000/) to obtain
  # diagnostic information from Envoy. See
  # https://lyft.github.io/envoy/docs/operations/admin.html

			filter:       EndpointFilter{},
		},
		{
			name:         "portfilter",
			outputFormat: "json",
			filter: EndpointFilter{
				Port: 8080,
			},
		},
		{
			name:         "portfilter",
			outputFormat: "yaml",
			filter: EndpointFilter{
				Port: 8080,
			},
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			gotOut := &bytes.Buffer{}

```

</div>

então a variável interna `__name__` no seu arquivo, criada automaticamente pelo Python, terá como valor a string `"__main__"`.

Então, a seção:

```Python
    uvicorn.run(app, host="0.0.0.0", port=8000)
```

vai executar.

---

Isso não acontecerá se você importar esse módulo (arquivo).

Então, se você tiver outro arquivo `importer.py` com:

```Python
from myapp import app