"time"

	xhttp "github.com/minio/minio/internal/http"
	"github.com/minio/minio/internal/logger"
	"github.com/minio/minio/internal/mcontext"
	xnet "github.com/minio/pkg/v2/net"
)

const logSubsys = "internodes"

// DefaultTimeout - default REST timeout is 10 seconds.
const DefaultTimeout = 10 * time.Second

const (
	offline = iota
	online
	closed
)

| `minio_system_network_internode_dial_errors_total`   | `counter` | Total number of internode TCP dial timeouts and errors   | `server,pool_index` |
| `minio_system_network_internode_dial_avg_time_nanos` | `gauge`   | Average dial time of internodes TCP calls in nanoseconds | `server,pool_index` |

| `minio_inter_node_traffic_dial_avg_time`  | Average time of internodes TCP dial calls.              |
| `minio_inter_node_traffic_dial_errors`    | Total number of internode TCP dial timeouts and errors. |
| `minio_inter_node_traffic_errors_total`   | Total number of failed internode calls.                 |

		Name:      errorsTotal,
		Help:      "Total number of failed internode calls",
		Type:      counterMetric,
	}
}

func getInternodeTCPDialTimeout() MetricDescription {
	return MetricDescription{
		Namespace: interNodeMetricNamespace,
		Subsystem: trafficSubsystem,
		Name:      "dial_errors",
		Help:      "Total number of internode TCP dial timeouts and errors",
		Type:      counterMetric,
	}
}

)

var (
	internodeErrorsTotalMD = NewCounterMD(internodeErrorsTotal,
		"Total number of failed internode calls")
	internodeDialedErrorsTotalMD = NewCounterMD(internodeDialErrorsTotal,
		"Total number of internode TCP dial timeouts and errors")
	internodeDialAvgTimeNanosMD = NewGaugeMD(internodeDialAvgTimeNanos,
		"Average dial time of internode TCP calls in nanoseconds")
	internodeSentBytesTotalMD = NewCounterMD(internodeSentBytesTotal,

	}
}

// DialContext is a function to make custom Dial for internode communications
type DialContext func(ctx context.Context, network, address string) (net.Conn, error)

// NewInternodeDialContext setups a custom dialer for internode communication
var NewInternodeDialContext = NewCustomDialContext

// NewCustomDialContext configures a custom dialer for internode communications

	// 	}
	// }

	return tr
}

// NewInternodeHTTPTransport returns transport for internode MinIO connections.
func (s ConnSettings) NewInternodeHTTPTransport(maxIdleConnsPerHost int) func() http.RoundTripper {
	tr := s.getDefaultTransport(maxIdleConnsPerHost)

	// Settings specific to internode requests.
	tr.TLSHandshakeTimeout = 15 * time.Second

	return func() http.RoundTripper {
		return tr
	}

	s3OutputBytes        uint64
}

// Increase internode total input bytes
func (s *connStats) incInternodeInputBytes(n int64) {
	atomic.AddUint64(&s.internodeInputBytes, uint64(n))
}

// Increase internode total output bytes
func (s *connStats) incInternodeOutputBytes(n int64) {
	atomic.AddUint64(&s.internodeOutputBytes, uint64(n))
}

// Return internode total input bytes

				}
			}
		})
		return nil
	}
}

// DialContext is a function to make custom Dial for internode communications
type DialContext func(ctx context.Context, network, address string) (net.Conn, error)

// NewInternodeDialContext setups a custom dialer for internode communication
func NewInternodeDialContext(dialTimeout time.Duration, opts TCPOptions) DialContext {

### Importe `List` do typing

Primeiramente, importe `List` do módulo `typing` que já vem por padrão no Python:

```Python hl_lines="1"
{!../../../docs_src/body_nested_models/tutorial002.py!}
```

### Declare a `List` com um parâmetro de tipo

Para declarar tipos que têm parâmetros de tipo(tipos internos), como `list`, `dict`, `tuple`: