$ $Env:MY_NAME = "Wade Wilson"

// L'utiliser avec d'autres programmes, par exemple
$ echo "Hello $Env:MY_NAME"

Hello Wade Wilson
```

</div>

////

## Lire des variables d'environnement en Python { #read-env-vars-in-python }

Vous pouvez également créer des variables d'environnement **en dehors** de Python, dans le terminal (ou par tout autre moyen), puis les **lire en Python**.

Um **gerenciador de contexto** em Python é algo que você pode usar em uma declaração `with`, por exemplo, `open()` pode ser usado como um gerenciador de contexto:

```Python
with open("file.txt") as file:
    file.read()
```

Em versões mais recentes do Python, há também um **gerenciador de contexto assíncrono**. Você o usaria com `async with`:

```Python
async with lifespan(app):
    await do_stuff()
```

ner("DOMContentLoaded",P),ie.removeEventListener("load",P),ce.ready()}ce.fn.ready=function(e){return O.then(e)["catch"](function(e){ce.readyException(e)}),this},ce.extend({isReady:!1,readyWait:1,ready:function(e){(!0===e?--ce.readyWait:ce.isReady)||(ce.isReady=!0)!==e&&0<--ce.readyWait||O.resolveWith(C,[ce])}}),ce.ready.then=O.then,"complete"===C.readyState||"loading"!==C.readyState&&!C.documentElement.doScroll?ie.setTimeout(ce.ready):(C.addEventListener("DOMContentLoaded",P),ie.addEventListener("load",P));var...

          "fullMetaSearch": false,
          "hide": false,
          "includeNullMetadata": true,
          "instant": false,
          "legendFormat": "Pool {{pool}} / Set {{set}} - Read Quorum",
          "range": true,
          "refId": "B",
          "useBackend": false
        },
        {
          "datasource": {
            "type": "prometheus",

// Code generated by github.com/tinylib/msgp DO NOT EDIT.

package cmd

import (
	"github.com/tinylib/msgp/msgp"
)

// DecodeMsg implements msgp.Decodable
func (z *BucketMetadata) DecodeMsg(dc *msgp.Reader) (err error) {
	var field []byte
	_ = field
	var zb0001 uint32
	zb0001, err = dc.ReadMapHeader()
	if err != nil {
		err = msgp.WrapError(err)
		return
	}
	for zb0001 > 0 {
		zb0001--
		field, err = dc.ReadMapKeyPtr()

        // Verify reserved field is zero
        assertEquals(0, SMBUtil.readInt4(buffer, offset + 28));
    }

    @Test
    @DisplayName("Should read empty bytes from wire format")
    void testReadBytesWireFormat() {
        // Given
        byte[] buffer = new byte[256];
        int offset = 10;

        // When

```Python
with open("file.txt") as file:
    file.read()
```

Dans les versions récentes de Python, il existe aussi un **gestionnaire de contexte asynchrone**. Vous l'utiliseriez avec `async with` :

```Python
async with lifespan(app):
    await do_stuff()
```

                                responseData.setResponseBody(InputStreamUtil.getBytes(contentStream));
                            } catch (final Exception e) {
                                logger.warn("Failed to read file content: file={}, size={}", file.getAbsolutePath(), file.length(), e);
                                responseData.setHttpStatusCode(Constants.SERVER_ERROR_STATUS_CODE);
                            }

		}
	}
	o.debugln("forwarded to ", o.Prefix, "marker:", o.Marker, "sep:", o.Separator)

	// Filter
	if !o.Recursive {
		entries.o = make(metaCacheEntries, 0, o.Limit)
		pastPrefix := false
		err := r.readFn(func(entry metaCacheEntry) bool {
			if o.Prefix != "" && !strings.HasPrefix(entry.name, o.Prefix) {
				// We are past the prefix, don't continue.
				pastPrefix = true
				return false
			}

			}
			if !c.header {
				args.FileHeaderInfo = none
			}
			inr := io.Reader(bytes.NewReader(input))
			if c.sendErr != nil {
				inr = io.MultiReader(inr, errReader{c.sendErr})
			}
			r, _ := NewReader(io.NopCloser(inr), &args)
			fields := 0
			for {
				record, err = r.Read(record)
				if err != nil {
					break
				}

				opts := sql.WriteCSVOpts{