1.93725rem;\n  padding: 0.35rem 1rem;\n}\n\n.text-sm .main-header .nav-link > .fa,\n.text-sm .main-header .nav-link > .fas,\n.text-sm .main-header .nav-link > .far,\n.text-sm .main-header .nav-link > .fab,\n.text-sm .main-header .nav-link > .fal,\n.text-sm .main-header .nav-link > .fad,\n.text-sm .main-header .nav-link > .svg-inline--fa,\n.text-sm .main-header .nav-link > .ion, .main-header.text-sm .nav-link > .fa,\n.main-header.text-sm .nav-link > .fas,\n.main-header.text-sm .nav-link > .far,\n.main-header.text-sm...

```

</div>

/// note | Not

`uvicorn main:app` komutu şunları ifade eder:

* `main`: `main.py` dosyası (Python "module").
* `app`: `main.py` içinde `app = FastAPI()` satırıyla oluşturulan nesne.

Şununla eşdeğerdir:

```Python
from main import app
```

///

import okhttp3.MediaType
import okhttp3.MediaType.Companion.toMediaTypeOrNull
import okhttp3.Request
import okhttp3.RequestBody.Companion.toRequestBody
import okhttp3.curl.Main
import okhttp3.internal.http.StatusLine
import okio.sink

internal fun Main.commonCreateRequest(): Request {
  val request = Request.Builder()

  val requestMethod = method ?: if (data != null) "POST" else "GET"

這個 `entrypoint` 會告訴 `fastapi` 指令應該用下面的方式匯入 app：

```python
from main import app
```

如果你的程式碼結構像是：

```
.
├── backend
│   ├── main.py
│   ├── __init__.py
```

那你應該把 `entrypoint` 設為：

```toml
[tool.fastapi]
entrypoint = "backend.main:app"
```

這等同於：

```python
from backend.main import app
```

### 搭配路徑使用 `fastapi dev` { #fastapi-dev-with-path }

import re
import sys
from datetime import date

RELEASE_NOTES_FILE = "docs/en/docs/release-notes.md"
RELEASE_HEADER_PATTERN = re.compile(r"^## (\d+\.\d+\.\d+)\s*(\(.*\))?\s*$")


def main() -> None:
    with open(RELEASE_NOTES_FILE) as f:
        lines = f.readlines()

    for i, line in enumerate(lines):
        match = RELEASE_HEADER_PATTERN.match(line)
        if not match:
            continue

<div class="termy">

```console
// Aqui ainda não definimos a variável de ambiente
$ python main.py

// Como não definimos a variável de ambiente, obtemos o valor padrão

Hello World from Python

// Mas se criarmos uma variável de ambiente primeiro
$ export MY_NAME="Wade Wilson"

// E então chamar o programa novamente
$ python main.py

// Agora ele pode ler a variável de ambiente

Hello Wade Wilson from Python
```

	export GOOS=$os
	export GOARCH=$arch
	export GO111MODULE=on
	go build -trimpath -tags kqueue -o /dev/null
}

function main() {
	echo "Testing builds for OS/Arch: ${SUPPORTED_OSARCH}"
	for each_osarch in ${SUPPORTED_OSARCH}; do
		_build "${each_osarch}"
	done
}

//go:build ignore

// Compute Fibonacci numbers with two goroutines
// that pass integers back and forth.  No actual
// concurrency, just threads and synchronization
// and foreign code on multiple pthreads.

package main

import (
	big "."
	"runtime"
)

func fibber(c chan *big.Int, out chan string, n int64) {
	// Keep the fibbers in dedicated operating system
	// threads, so that this program tests coordination

```
.
├── app
│   ├── __init__.py
│   ├── main.py
│   └── test_main.py
```

El archivo `main.py` tendría:

{* ../../docs_src/async_tests/app_a_py310/main.py *}

El archivo `test_main.py` tendría los tests para `main.py`, podría verse así ahora:

{* ../../docs_src/async_tests/app_a_py310/test_main.py *}

## Ejecútalo { #run-it }

```
.
├── app
│   ├── __init__.py
│   ├── main.py
│   └── test_main.py
```

Le fichier `main.py` contiendrait :

{* ../../docs_src/async_tests/app_a_py310/main.py *}

Le fichier `test_main.py` contiendrait les tests pour `main.py`, il pourrait maintenant ressembler à ceci :

{* ../../docs_src/async_tests/app_a_py310/test_main.py *}