Let's use the tools provided by **FastAPI** to handle security.

## How it looks

Let's first just use the code and see how it works, and then we'll come back to understand what's happening.

## Create `main.py`

Copy the example in a file `main.py`:

//// tab | Python 3.9+

```Python
{!> ../../docs_src/security/tutorial001_an_py39.py!}
```

////

//// tab | Python 3.8+

```Python

///

## 主**FastAPI**应用程序

现在在`sql_app/main.py`文件中 让我们集成和使用我们之前创建的所有其他部分。

### 创建数据库表

以非常简单的方式创建数据库表：

//// tab | Python 3.9+

```Python hl_lines="7"
{!> ../../docs_src/sql_databases/sql_app_py39/main.py!}
```

////

//// tab | Python 3.8+

```Python hl_lines="9"
{!> ../../docs_src/sql_databases/sql_app/main.py!}
```

////

#### Alembic 注意

<!--
NOTE: In this document and others in this directory, the convention is to
set fixed-width phrases with non-fixed-width spaces, as in
`hello` `world`.
-->

<style>
  main ul li { margin: 0.5em 0; }
</style>

## DRAFT RELEASE NOTES — Introduction to Go 1.N {#introduction}

**Go 1.N is not yet released. These are work-in-progress release notes.

# Markdown files sometimes need trailing whitespaces.
[*.md]
trim_trailing_whitespace = false

[*.{yml,yaml}]
indent_size = 2

[gradle/verification-metadata.xml]
indent_size = 3

[subprojects/launcher/src/main/resources/release-features.txt]

		echo "failed to download https://raw.githubusercontent.com/minio/mc/master/functional-tests.sh"
		exit 1
	fi

	sed -i 's|-sS|-sSg|g' "$FUNCTIONAL_TESTS"
	chmod a+x "$FUNCTIONAL_TESTS"
}

function main() {
	echo "Testing in FS setup"
	if ! run_test_fs; then
		echo "FAILED"
		purge "$WORK_DIR"
		exit 1
	fi

	echo "Testing in Erasure setup"
	if ! run_test_erasure; then
		echo "FAILED"

	httpServer.MaxHeaderBytes = DefaultMaxHeaderBytes
	return httpServer
}

// SetMinIOVersion -- MinIO version from the main package is set here
func SetMinIOVersion(version string) {
	GlobalMinIOVersion = version
}

// SetDeploymentID -- Deployment Id from the main package is set here
func SetDeploymentID(deploymentID string) {
	GlobalDeploymentID = deploymentID

* [fess_label_en.properties](https://github.com/codelibs/fess/blob/master/src/main/resources/fess_label_en.properties)
* [fess_message_en.properties](https://github.com/codelibs/fess/blob/master/src/main/resources/fess_message_en.properties)

<span style="color: green;">INFO</span>:     Application startup complete.
```

</div>

/// note | "Not"

`uvicorn main:app` komutunu şu şekilde açıklayabiliriz:

* `main`: dosya olan `main.py` (yani Python "modülü").
* `app`: ise `main.py` dosyasının içerisinde `app = FastAPI()` satırında oluşturduğumuz `FastAPI` nesnesi.

If the -w option is given, buildid rewrites the build ID found in
the file to accurately record a content hash of the file.

This tool is only intended for use by the go command or
other build systems.
*/

// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build !compiler_bootstrap

package main

import (
	"go/ast"
	"go/token"
)

func (f *File) walkUnexpected(x interface{}, context astContext, visit func(*File, interface{}, astContext)) {
	switch n := x.(type) {
	default:
		error_(token.NoPos, "unexpected type %T in walk", x)