to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.

    <one line to give the program's name and a brief idea of what it does.>
    Copyright (C) <year>  <name of author>

    This program is free software: you can redistribute it and/or modify

from fastapi import FastAPI

app = FastAPI()


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}
```

### Dockerfile

现在在相同的project目录创建一个名为`Dockerfile`的文件:

```{ .dockerfile .annotate }
# (1)
FROM python:3.9

# (2)
WORKDIR /code

		defer metaDataPoolPut(buf)
	}

	if readData {
		if len(fi.Data) > 0 || fi.Size == 0 {
			if fi.InlineData() {
				// If written with header we are fine.
				return fi, nil
			}
			if fi.Size == 0 || (fi.VersionID == "" || fi.VersionID == nullVersionID) {
				// If versioned we have no conflicts.
				fi.SetInlineData()
				return fi, nil
			}

		{"ends-with-a-dot.", true},
		{"ends-with-a-dash-", true},
		{"-starts-with-a-dash", true},
		{"THIS-BEINGS-WITH-UPPERCASe", true},
		{"tHIS-ENDS-WITH-UPPERCASE", true},
		{"ThisBeginsAndEndsWithUpperCase", true},
		{"una ñina", true},
		{"lalalallalallalalalallalallalala-theString-size-is-greater-than-64", true},
		// cases for which test should fail.
		// passing invalid bucket names.
		{"", false},
		{SlashSeparator, false},
		{"a", false},

pkg log/slog, type Source struct #59280
pkg log/slog, type Source struct, File string #59280
pkg log/slog, type Source struct, Function string #59280
pkg log/slog, type Source struct, Line int #59280
pkg log/slog, type TextHandler struct #56345
pkg log/slog, type Value struct #56345
pkg maps, func Clone[$0 interface{ ~map[$1]$2 }, $1 comparable, $2 interface{}]($0) $0 #57436

		{"ends-with-a-dash-", false},
		{"-starts-with-a-dash", false},
		{"THIS-BEGINS-WITH-UPPERCASe", false},
		{"tHIS-ENDS-WITH-UPPERCASE", false},
		{"ThisBeginsAndEndsWithUpperCasE", false},
		{"una ñina", false},
		{"dash-.may-not-appear-next-to-dot", false},
		{"dash.-may-not-appear-next-to-dot", false},
		{"dash-.-may-not-appear-next-to-dot", false},

	{"[):[o-FP", ""},     // Issue 12469 - there was no infinite loop for ARM; these are just sanity checks.
	{"[):[R0-FP", ""},
	{"(", ""}, // Issue 12466 - backed up before beginning of line.
}

var ppc64OperandTests = []operandTest{
	{"$((1<<63)-1)", "$9223372036854775807"},
	{"$(-64*1024)", "$-65536"},
	{"$(1024 * 8)", "$8192"},
	{"$-1", "$-1"},
	{"$-24(R4)", "$-24(R4)"},
	{"$0", "$0"},

```

/// tip

There are several `__init__.py` files: one in each directory or subdirectory.

This is what allows importing code from one file into another.

For example, in `app/main.py` you could have a line like:

```
from app.routers import items
```

///

* The `app` directory contains everything. And it has an empty file `app/__init__.py`, so it is a "Python package" (a collection of "Python modules"): `app`.

```console
$ source .venv/Scripts/activate
```

</div>

////

/// tip | 豆知識

**新しいパッケージ**を仮想環境にインストールするときには、再度**有効化**してください。

こうすることで、そのパッケージがインストールした**ターミナル（<abbr title="command line interface">CLI</abbr>）プログラム**を使用する場合に、仮想環境内のものが確実に使われ、グローバル環境にインストールされている別のもの（おそらく必要なものとは異なるバージョン）を誤って使用することを防ぎます。

///

## 仮想環境が有効であることを確認する

仮想環境が有効である（前のコマンドが正常に機能した）ことを確認します。

/// tip | 豆知識

        if ("always".equals(styleColor) || "yes".equals(styleColor) || "force".equals(styleColor)) {
            context.coloredOutput = true;
        } else if ("never".equals(styleColor) || "no".equals(styleColor) || "none".equals(styleColor)) {
            context.coloredOutput = false;
        } else if (!"auto".equals(styleColor) && !"tty".equals(styleColor) && !"if-tty".equals(styleColor)) {
            throw new IllegalArgumentException(