$ export MY_NAME="Wade Wilson"

// 然后，你可以在其他程序中使用它，例如
$ echo "Hello $MY_NAME"

Hello Wade Wilson
```

</div>

////

//// tab | Windows PowerShell

<div class="termy">

```console
// 创建一个名为 MY_NAME 的环境变量
$ $Env:MY_NAME = "Wade Wilson"

// 在其他程序中使用它，例如
$ echo "Hello $Env:MY_NAME"

Hello Wade Wilson
```

</div>

////

## 在 Python 中读取环境变量

    assertHash32(0x1C8600E3, CRC_32, "hell");
    assertHash32(0x3610A686, CRC_32, "hello");
    assertHash32(0xED81F9F6, CRC_32, "hello ");
    assertHash32(0x4850DDC2, CRC_32, "hello w");
    assertHash32(0x7A2D6005, CRC_32, "hello wo");
    assertHash32(0x1C192672, CRC_32, "hello wor");
    assertHash32(0x414FA339, CRC_32, "The quick brown fox jumps over the lazy dog");

@pytest.mark.parametrize(
    "path",
    [
        "/optional-bytes",
        "/optional-uploadfile",
    ],
)
def test_optional(path: str):
    client = TestClient(app)
    response = client.post(path, files=[("p", b"hello")])
    assert response.status_code == 200
    assert response.json() == {"file_size": 5}


# =====================================================================================
# Alias

Examples:

    Source (English):

        «««
        "Hello world"
        “Hello Universe”
        "He said: 'Hello'"
        "The module is `__main__`"
        »»»

    Result (French):

        «««
        «Hello world»
        «Hello Universe»
        «He said: 'Hello'»
        «The module is `__main__`»
        »»»

### Ellipsis

    "path",
    ["/required-list-str", "/model-required-list-str"],
)
def test_required_list_str(path: str):
    client = TestClient(app)
    response = client.get(f"{path}?p=hello&p=world")
    assert response.status_code == 200
    assert response.json() == {"p": ["hello", "world"]}


# =====================================================================================
# Alias


@app.get("/required-list-alias")

@pytest.mark.parametrize(
    "path",
    [
        "/list-bytes",
        "/list-uploadfile",
    ],
)
def test_list(path: str):
    client = TestClient(app)
    response = client.post(path, files=[("p", b"hello"), ("p", b"world")])
    assert response.status_code == 200
    assert response.json() == {"file_size": [5, 5]}


# =====================================================================================
# Alias

    ["/optional-list-str", "/model-optional-list-str"],
)
def test_optional_list_str(path: str):
    client = TestClient(app)
    response = client.post(path, json={"p": ["hello", "world"]})
    assert response.status_code == 200
    assert response.json() == {"p": ["hello", "world"]}


# =====================================================================================
# Alias

./mc version enable sitea/delissue --insecure

echo hello | ./mc pipe sitea/delissue/hello --insecure

./mc version suspend sitea/delissue --insecure

./mc rm sitea/delissue/hello --insecure

./mc version enable sitea/delissue --insecure

echo hello | ./mc pipe sitea/delissue/hello --insecure

./mc version suspend sitea/delissue --insecure

./mc rm sitea/delissue/hello --insecure

    "path",
    ["/optional-str", "/model-optional-str"],
)
def test_optional_str(path: str):
    client = TestClient(app)
    client.cookies.set("p", "hello")
    response = client.get(path)
    assert response.status_code == 200
    assert response.json() == {"p": "hello"}


# =====================================================================================
# Alias


@app.get("/optional-alias")

    serverIpv4.enqueue(
      MockResponse(body = "unexpected call to IPv4"),
    )
    serverIpv6.enqueue(
      MockResponse(body = "hello from IPv6"),
    )

    val call = client.newCall(Request(url))
    val response = call.execute()
    assertThat(response.body.string()).isEqualTo("hello from IPv6")

    // In the process we made one successful connection attempt.