# Ambientes Virtuais

Ao trabalhar em projetos Python, você provavelmente deve usar um **ambiente virtual** (ou um mecanismo similar) para isolar os pacotes que você instala para cada projeto.

/// info | "Informação"

Se você já sabe sobre ambientes virtuais, como criá-los e usá-los, talvez seja melhor pular esta seção. 🤓

///

/// tip | "Dica"

Um **ambiente virtual** é diferente de uma **variável de ambiente**.

.table-success:hover {\n  background-color: #b1dfbb;\n}\n\n.table-hover .table-success:hover > td,\n.table-hover .table-success:hover > th {\n  background-color: #b1dfbb;\n}\n\n.table-info,\n.table-info > th,\n.table-info > td {\n  background-color: #bee5eb;\n}\n\n.table-info th,\n.table-info td,\n.table-info thead th,\n.table-info tbody + tbody {\n  border-color: #86cfda;\n}\n\n.table-hover .table-info:hover {\n  background-color: #abdde5;\n}\n\n.table-hover .table-info:hover > td,\n.table-hover .table-info:hover...

import jcifs.internal.smb1.com.SmbComWrite;
import jcifs.internal.smb1.com.SmbComWriteAndX;
import jcifs.internal.smb1.com.SmbComWriteAndXResponse;
import jcifs.internal.smb1.com.SmbComWriteResponse;
import jcifs.internal.smb2.info.Smb2SetInfoRequest;
import jcifs.internal.smb2.io.Smb2WriteRequest;
import jcifs.internal.smb2.io.Smb2WriteResponse;


/**
 * This <code>OutputStream</code> can write bytes to a file on an SMB file server.
 */

my_user: User = User(id=3, name="John Doe", joined="2018-07-19")

second_user_data = {
    "id": 4,
    "name": "Mary",
    "joined": "2018-11-30",
}

my_second_user: User = User(**second_user_data)
```

/// info

`**second_user_data` ⛓:

🚶‍♀️ 🔑 & 💲 `second_user_data` #️⃣ 🔗 🔑-💲 ❌, 🌓: `User(id=4, name="Mary", joined="2018-11-30")`

///

### 👨‍🎨 🐕‍🦺

		}
	} else {
		apiRequestsMaxPerNode = cfg.RequestsMax
		if n := totalNodeCount(); n > 0 {
			apiRequestsMaxPerNode /= n
		}
	}

	if globalIsDistErasure {
		logger.Info("Configured max API requests per node based on available memory: %d", apiRequestsMaxPerNode)
	}

	if cap(t.requestsPool) != apiRequestsMaxPerNode {
		// Only replace if needed.

            setContext(contextBytes);
        }
        pos += 8;

        if ( targetNameOff < pos + 8 || input.length < pos + 8 ) {
            // no room for target info
            return;
        }

        byte[] targetInfo = readSecurityBuffer(input, pos);
        if ( targetInfo.length != 0 ) {
            setTargetInformation(targetInfo);
        }
    }

导入 `Enum` 并创建继承自 `str` 和 `Enum` 的子类。

通过从 `str` 继承，API 文档就能把值的类型定义为**字符串**，并且能正确渲染。

然后，创建包含固定值的类属性，这些固定值是可用的有效值：

```Python hl_lines="1  6-9"
{!../../docs_src/path_params/tutorial005.py!}
```

/// info | "说明"

Python 3.4 及之后版本支持<a href="https://docs.python.org/3/library/enum.html" class="external-link" target="_blank">枚举（即 enums）</a>。

///

/// tip | "提示"

```

/// note | "備考"

`status_code`は「デコレータ」メソッド（`get`、`post`など）のパラメータであることに注意してください。すべてのパラメータやボディのように、*path operation関数*のものではありません。

///

`status_code`パラメータはHTTPステータスコードを含む数値を受け取ります。

/// info | "情報"

`status_code`は代わりに、Pythonの<a href="https://docs.python.org/3/library/http.html#http.HTTPStatus" class="external-link" target="_blank">`http.HTTPStatus`</a>のように、`IntEnum`を受け取ることもできます。

///

これは:

@needs_py39
def test_openapi_schema(client: TestClient):
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == {
        "openapi": "3.1.0",
        "info": {"title": "FastAPI", "version": "0.1.0"},
        "paths": {
            "/users/": {
                "get": {
                    "tags": ["users"],
                    "summary": "Read Users",

// otherwise.
func (o ObjectOpts) ExpiredObjectDeleteMarker() bool {
	return o.DeleteMarker && o.NumVersions == 1
}

// Event contains a lifecycle action with associated info
type Event struct {
	Action                  Action
	RuleID                  string
	Due                     time.Time
	NoncurrentDays          int
	NewerNoncurrentVersions int
	StorageClass            string