* Há também um subdiretório `app/internal/` com outro arquivo `__init__.py`, então ele é outro "subpacote Python":`app.internal`.
* E o arquivo `app/internal/admin.py` é outro submódulo: `app.internal.admin`.

<img src="/img/tutorial/bigger-applications/package.svg">

A mesma estrutura de arquivos com comentários:

```
.
├── app                  # "app" é um pacote Python
│   ├── __init__.py      # este arquivo torna "app" um "pacote Python"

pkg io, func CopyBuffer(Writer, Reader, []uint8) (int64, error)
pkg log, const LUTC = 32
pkg log, const LUTC ideal-int
pkg log, func Output(int, string) error
pkg log, method (*Logger) SetOutput(io.Writer)
pkg math/big, const Above = 1
pkg math/big, const Above Accuracy
pkg math/big, const AwayFromZero = 3
pkg math/big, const AwayFromZero RoundingMode
pkg math/big, const Below = -1

- github.com/Azure/go-autorest/autorest: [v0.11.12 → v0.11.18](https://github.com/Azure/go-autorest/autorest/compare/v0.11.12...v0.11.18)
- github.com/Azure/go-autorest/logger: [v0.2.0 → v0.2.1](https://github.com/Azure/go-autorest/logger/compare/v0.2.0...v0.2.1)
- github.com/alecthomas/units: [c3de453 → f65c72e](https://github.com/alecthomas/units/compare/c3de453...f65c72e)

pkg log, method (*Logger) Fatal(...interface{})
pkg log, method (*Logger) Fatalf(string, ...interface{})
pkg log, method (*Logger) Fatalln(...interface{})
pkg log, method (*Logger) Flags() int
pkg log, method (*Logger) Output(int, string) error
pkg log, method (*Logger) Panic(...interface{})
pkg log, method (*Logger) Panicf(string, ...interface{})
pkg log, method (*Logger) Panicln(...interface{})

  - A `create` or `update` API request with duplicate items in a keyed list no longer wipes out managedFields. Examples include env var entries with the same name, or port entries with the same containerPort in a pod spec.
  - A server-side apply request that makes unrelated changes to an object which has duplicate items in a keyed list no longer fails, and leaves the existing duplicate items as-is.

pkg log/syslog (freebsd-386-cgo), func New(Priority, string) (*Writer, error)
pkg log/syslog (freebsd-386-cgo), func NewLogger(Priority, int) (*log.Logger, error)
pkg log/syslog (freebsd-386-cgo), method (*Writer) Alert(string) error
pkg log/syslog (freebsd-386-cgo), method (*Writer) Close() error
pkg log/syslog (freebsd-386-cgo), method (*Writer) Crit(string) error

- github.com/Azure/go-autorest/autorest: [v0.9.0](https://github.com/Azure/go-autorest/autorest/tree/v0.9.0)
- github.com/Azure/go-autorest/logger: [v0.1.0](https://github.com/Azure/go-autorest/logger/tree/v0.1.0)
- github.com/Azure/go-autorest/tracing: [v0.5.0](https://github.com/Azure/go-autorest/tracing/tree/v0.5.0)

The `TestClient` is based on <a href="https://www.python-httpx.org" class="external-link" target="_blank">HTTPX</a>, and luckily, we can use it directly to test the API.

## Example

	// maxBufferSize is the maximum buffer size.
	// Buffers larger than this is not reused.
	maxBufferSize = 96 << 10

	// This is the assumed size of bigger buffers and allocation size.
	biggerBufMin = 32 << 10

	// This is the maximum size of bigger buffers.
	biggerBufMax = maxBufferSize

	// If there is a queue, merge up to this many messages.
	maxMergeMessages = 50

* Use Python logger named "`fastapi`" instead of root logger. PR [#222](https://github.com/tiangolo/fastapi/pull/222) by [@euri10](https://github.com/euri10).