__path__ = [_tf_api_dir]
elif _tf_api_dir not in __path__:
  __path__.append(_tf_api_dir)

# Hook external TensorFlow modules.

# Load tensorflow-io-gcs-filesystem if enabled
if (_os.getenv("TF_USE_MODULAR_FILESYSTEM", "0") == "true" or
    _os.getenv("TF_USE_MODULAR_FILESYSTEM", "0") == "1"):
  import tensorflow_io_gcs_filesystem as _tensorflow_io_gcs_filesystem

# Lazy-load Keras v2/3.
_tf_uses_legacy_keras = (

	"context"
	"fmt"
	"log"
	"net/http"
	"os"

	cr "github.com/minio/minio-go/v7/pkg/credentials"
	cmd "github.com/minio/minio/cmd"
)

func main() {
	ctx := context.Background()

	endpoint := os.Getenv("MINIO_ENDPOINT")
	if endpoint == "" {
		log.Fatalf("Please specify a MinIO server endpoint environment variable like:\n\n\texport MINIO_ENDPOINT=http://localhost:9000")
	}

	appParams := cmd.OpenIDClientAppParams{

# lazy loading.
_current_module.compat.v2  # pylint: disable=pointless-statement

# Load tensorflow-io-gcs-filesystem if enabled
if (_os.getenv("TF_USE_MODULAR_FILESYSTEM", "0") == "true" or
    _os.getenv("TF_USE_MODULAR_FILESYSTEM", "0") == "1"):
  import tensorflow_io_gcs_filesystem as _tensorflow_io_gcs_filesystem

# Lazy-load Keras v1.
_tf_uses_legacy_keras = (

		SkipTLSVerify:         viper.GetBool(constants.SkipTLSVerify),
		K8sServiceProtocol:    os.Getenv("KUBERNETES_SERVICE_PROTOCOL"),
		K8sServiceHost:        os.Getenv("KUBERNETES_SERVICE_HOST"),
		K8sServicePort:        os.Getenv("KUBERNETES_SERVICE_PORT"),
		K8sNodeName:           os.Getenv("KUBERNETES_NODE_NAME"),
		K8sServiceAccountPath: constants.ServiceAccountPath,

		CNIBinSourceDir:  constants.CNIBinDir,

For example you could have a file `main.py` with:

```Python hl_lines="3"
import os

name = os.getenv("MY_NAME", "World")
print(f"Hello {name} from Python")
```

/// tip

The second argument to <a href="https://docs.python.org/3.8/library/os.html#os.getenv" class="external-link" target="_blank">`os.getenv()`</a> is the default value to return.

      private var nextId = 1

      override fun newThread(runnable: Runnable): Thread {
        return Thread(runnable, "$name-${nextId++}")
      }
    }
  }
}

fun getEnv(name: String) = System.getenv(name)

val SYSTEM_FILE_SYSTEM = FileSystem.SYSTEM

package main

import (
	"flag"
	"fmt"
	"go/build"
	"internal/testenv"
	"os"
	"path/filepath"
	"sort"
	"strings"
	"sync"
	"testing"
)

var flagCheck = flag.Bool("check", false, "run API checks")

func TestMain(m *testing.M) {
	flag.Parse()
	for _, c := range contexts {
		c.Compiler = build.Default.Compiler
	}
	build.Default.GOROOT = testenv.GOROOT(nil)

	os.Exit(m.Run())
}

var (

        final String appType = System.getenv(FESS_APP_TYPE);
        if (StringUtil.isNotBlank(appType)) {
            return appType;
        }
        return StringUtil.EMPTY;
    }

    public static OptionalEntity<String> getOverrideConfPath() {
        if (FESS_APP_DOCKER.equalsIgnoreCase(getAppType())) {
            final String confPath = System.getenv(FESS_OVERRIDE_CONF_PATH);

Например, у вас есть файл `main.py`:

```Python hl_lines="3"
import os

name = os.getenv("MY_NAME", "World")
print(f"Hello {name} from Python")
```

/// tip

Второй аргумент <a href=«https://docs.python.org/3.8/library/os.html#os.getenv» class=«external-link» target=«_blank»>`os.getenv()`</a> - это возвращаемое по умолчанию значение.

import os
from typing import Any, Dict

from pdm.backend.hooks import Context

TIANGOLO_BUILD_PACKAGE = os.getenv("TIANGOLO_BUILD_PACKAGE", "fastapi")


def pdm_build_initialize(context: Context) -> None:
    metadata = context.config.metadata
    # Get custom config for the current package, from the env var
    config: Dict[str, Any] = context.config.data["tool"]["tiangolo"][
        "_internal-slim-build"