)


def ensure_multipart_is_installed() -> None:
    try:
        from python_multipart import __version__

        # Import an attribute that can be mocked/deleted in testing
        assert __version__ > "0.0.12"
    except (ImportError, AssertionError):
        try:
            # __version__ is available in both multiparts, and can be mocked
            from multipart import __version__  # type: ignore[no-redef,import-untyped]

        fileBuilder.append(".tmp")
        dirtyFiles += directory / fileBuilder.toString()
        fileBuilder.setLength(truncateTo)
      }
    }

    /** Set lengths using decimal numbers like "10123". */
    @Throws(IOException::class)
    internal fun setLengths(strings: List<String>) {
      if (strings.size != valueCount) {
        invalidLengths(strings)
      }

      try {

	}
}

func createTestInput(n int) []byte {
	input := make([]byte, n)
	for i := range input {
		// 101 and 251 are arbitrary prime numbers.
		// The idea is to create an input sequence
		// which doesn't repeat too frequently.
		input[i] = byte(i % 251)
		if i%101 == 0 {
			input[i] ^= byte(i / 101)
		}
	}
	return input
}

func TestReaderWriteTo(t *testing.T) {

		if ok1 || ok2 {
			return ok1 && ok2
		}
		return x == y
	}
	for _, v := range vectors {
		t.Run(strings.TrimSuffix(path.Base(v.file), ".base64"), func(t *testing.T) {
			const maxSize = 10 << 10 // 10KiB
			buf := new(bytes.Buffer)
			tw := NewWriter(iotest.TruncateWriter(buf, maxSize))

			for i, tf := range v.tests {
				switch tf := tf.(type) {
				case testHeader:

```Python hl_lines="5" title="app/main.py"
{!../../docs_src/bigger_applications/app/main.py!}
```

### 包含 `users` 和 `items` 的 `APIRouter`

现在，让我们来包含来自 `users` 和 `items` 子模块的 `router`。

```Python hl_lines="10-11" title="app/main.py"
{!../../docs_src/bigger_applications/app/main.py!}
```

/// info

`users.router` 包含了 `app/routers/users.py` 文件中的 `APIRouter`。

```
.
├── Dockerfile
├── main.py
└── requirements.txt
```

Então você só teria que alterar os caminhos correspondentes para copiar o arquivo dentro do `Dockerfile`:

```{ .dockerfile .annotate hl_lines="10  13" }
FROM python:3.9

WORKDIR /code

COPY ./requirements.txt /code/requirements.txt

RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt

# (1)!
COPY ./main.py /code/

		storageClassCfg     storageclass.Config
		expectedError       error
	}{
		{parts1, errs1, 12, 12, parts1SC, nil},
		{parts2, errs2, 14, 14, parts2SC, nil},
		{parts3, errs3, 12, 12, parts3SC, nil},
		{parts4, errs4, 10, 10, parts4SC, nil},
		{parts5, errs5, 14, 14, parts5SC, nil},
		{parts6, errs6, 12, 12, parts6SC, nil},
		{parts7, errs7, 11, 11, parts7SC, nil},
	}
	for _, tt := range tests {

			ListMultipartsInfo{KeyMarker: "europe-object", Prefix: "Asia", IsTruncated: false},
			nil, true,
		},
		// Setting an invalid combination of uploadIDMarker and Marker (Test number 11-12).
		{
			bucketNames[0], "asia", "asia/europe/", "abc", "", 0,
			ListMultipartsInfo{},
			fmt.Errorf("Invalid combination of uploadID marker '%s' and marker '%s'", "abc", "asia/europe/"), false,
		},
		{

		{"test-bucket-list-object", "Asia", "europe-object", "", 0, ListObjectsInfo{}, nil, true},
		// Setting a non-existing directory to be prefix (10-11).
		{"empty-bucket", "europe/france/", "", "", 1, ListObjectsInfo{}, nil, true},
		{"empty-bucket", "africa/tunisia/", "", "", 1, ListObjectsInfo{}, nil, true},

```
.
├── Dockerfile
├── main.py
└── requirements.txt
```

そうすれば、`Dockerfile`の中にファイルをコピーするために、対応するパスを変更するだけでよいです：

```{ .dockerfile .annotate hl_lines="10  13" }
FROM python:3.9

WORKDIR /code

COPY ./requirements.txt /code/requirements.txt

RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt

# (1)
COPY ./main.py /code/

# (2)