IntegerDiv10 eleven = new IntegerDiv10(11);
    IntegerDiv10 twelve = new IntegerDiv10(12);
    IntegerDiv10 twenty = new IntegerDiv10(20);

    List<IntegerDiv10> original = ImmutableList.of(three, eleven, twelve, twenty);

    Multiset<IntegerDiv10> copy = ImmutableSortedMultiset.copyOf(original);
    assertTrue(copy.contains(eleven));
    assertTrue(copy.contains(twelve));
  }

    IntegerDiv10 eleven = new IntegerDiv10(11);
    IntegerDiv10 twelve = new IntegerDiv10(12);
    IntegerDiv10 twenty = new IntegerDiv10(20);

    List<IntegerDiv10> original = ImmutableList.of(three, eleven, twelve, twenty);

    Multiset<IntegerDiv10> copy = ImmutableSortedMultiset.copyOf(original);
    assertTrue(copy.contains(eleven));
    assertTrue(copy.contains(twelve));
  }

            new IntegerDiv10(12), "twelve");

    assertThrows(IllegalArgumentException.class, () -> ImmutableSortedMap.copyOf(original));
  }

  public void testImmutableMapCopyOfImmutableSortedMap() {
    IntegerDiv10 three = new IntegerDiv10(3);
    IntegerDiv10 eleven = new IntegerDiv10(11);
    IntegerDiv10 twelve = new IntegerDiv10(12);
    IntegerDiv10 twenty = new IntegerDiv10(20);

Hello Wade Wilson from Python

// The env var no longer exists afterwards
$ python main.py

Hello World from Python
```

</div>

/// tip

You can read more about it at [The Twelve-Factor App: Config](https://12factor.net/config).

///

## Types and Validation { #types-and-validation }

// 이제 환경 변수를 읽을 수 있습니다

Hello Wade Wilson from Python

// 이후에는 해당 환경 변수가 존재하지 않습니다
$ python main.py

Hello World from Python
```

</div>

/// tip | 팁

[The Twelve-Factor App: Config](https://12factor.net/config) 에서 좀 더 자세히 알아볼 수 있습니다.

///

## 타입과 검증 { #types-and-validation }

// 現在就可以讀取到環境變數了

Hello Wade Wilson from Python

// 在此之後這個環境變數將不再存在
$ python main.py

Hello World from Python
```

</div>

/// tip

你可以在 [The Twelve-Factor App: 配置](https://12factor.net/config) 中了解更多資訊。

///

## 型別和驗證 { #types-and-validation }

這些環境變數只能處理**文字字串**，因為它們是位於 Python 範疇之外的，必須與其他程式和作業系統的其餘部分相容（甚至與不同的作業系統相容，如 Linux、Windows、macOS）。

// 现在就可以读取到环境变量了

Hello Wade Wilson from Python

// 在此之后这个环境变量将不会依然存在
$ python main.py

Hello World from Python
```

</div>

/// tip | 提示

你可以在 [The Twelve-Factor App: 配置](https://12factor.net/config) 中了解更多信息。

///

## 类型和验证 { #types-and-validation }

这些环境变量只能处理**文本字符串**，因为它们是处于 Python 范畴之外的，必须与其他程序和操作系统的其余部分兼容（甚至与不同的操作系统兼容，如 Linux、Windows、macOS）。

// これで環境変数を読み取れます

Hello Wade Wilson from Python

// その後は環境変数は存在しません
$ python main.py

Hello World from Python
```

</div>

/// tip | 豆知識

詳しくは [The Twelve-Factor App: 設定](https://12factor.net/config) を参照してください。

///

## 型とバリデーション { #types-and-validation }

oh! she knows such a very little!  Besides, SHE'S she, and I'm I,
and--oh dear, how puzzling it all is!  I'll try if I know all the
things I used to know.  Let me see:  four times five is twelve,
and four times six is thirteen, and four times seven is--oh dear!
I shall never get to twenty at that rate!  However, the
Multiplication Table doesn't signify:  let's try Geography.

oh! she knows such a very little!  Besides, SHE'S she, and I'm I,
and--oh dear, how puzzling it all is!  I'll try if I know all the
things I used to know.  Let me see:  four times five is twelve,
and four times six is thirteen, and four times seven is--oh dear!
I shall never get to twenty at that rate!  However, the
Multiplication Table doesn't signify:  let's try Geography.