啟用虛擬環境後，`PATH` 變數會變成這樣：

//// tab | Linux, macOS

```plaintext
/home/user/code/awesome-project/.venv/bin:/usr/bin:/bin:/usr/sbin:/sbin
```

這意味著系統現在會首先在以下目錄中查找程式：

```plaintext
/home/user/code/awesome-project/.venv/bin
```

然後再在其他目錄中查找。

因此，當你在終端機中輸入 `python` 時，系統會在以下目錄中找到 Python 程式：

```plaintext
/home/user/code/awesome-project/.venv/bin/python
```

並使用這個。

////

        assertNull(permissionHelper.encode("(deny){group}"));
    }

    public void test_passthroughValues() {
        assertEquals("plaintext", permissionHelper.encode("plaintext"));
        assertEquals("plaintext", permissionHelper.decode("plaintext"));

        assertEquals("abc", permissionHelper.encode("abc"));
        assertEquals("abc", permissionHelper.decode("abc"));

//// tab | Linux, macOS

```plaintext
/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
```

Isso significa que o sistema deve procurar programas nos diretórios:

* `/usr/local/bin`
* `/usr/bin`
* `/bin`
* `/usr/sbin`
* `/sbin`

////

//// tab | Windows

```plaintext
C:\Program Files\Python312\Scripts;C:\Program Files\Python312;C:\Windows\System32

例えば、`PATH`環境変数は次のような文字列かもしれません:

//// tab | Linux, macOS

```plaintext
/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
```

これは、OSはプログラムを見つけるために以下のディレクトリを探す、ということを意味します:

* `/usr/local/bin`
* `/usr/bin`
* `/bin`
* `/usr/sbin`
* `/sbin`

////

//// tab | Windows

```plaintext
C:\Program Files\Python312\Scripts;C:\Program Files\Python312;C:\Windows\System32
```

//// tab | Linux, macOS

```plaintext
/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
```

Điều này có nghĩa là hệ thống sẽ tìm kiếm các chương trình trong các thư mục:

* `/usr/local/bin`
* `/usr/bin`
* `/bin`
* `/usr/sbin`
* `/sbin`

////

//// tab | Windows

```plaintext
C:\Program Files\Python312\Scripts;C:\Program Files\Python312;C:\Windows\System32

```plaintext
/home/user/code/awesome-project/.venv/bin/python
```

và sử dụng chương trình đó.

////

//// tab | Windows

```plaintext
C:\Users\user\code\awesome-project\.venv\Scripts;C:\Windows\System32
```

Nghĩa là hệ thống sẽ bắt đầu tìm kiếm chương trình trong:

```plaintext
C:\Users\user\code\awesome-project\.venv\Scripts
```

```plaintext
/home/user/code/awesome-project/.venv/bin/python
```

y utilizará ese.

////

//// tab | Windows

```plaintext
C:\Users\user\code\awesome-project\.venv\Scripts;C:\Windows\System32
```

Eso significa que el sistema ahora comenzará a buscar primero los programas en:

```plaintext
C:\Users\user\code\awesome-project\.venv\Scripts
```

```plaintext
/home/user/code/awesome-project/.venv/bin/python
```

e usa esse.

////

//// tab | Windows

```plaintext
C:\Users\user\code\awesome-project\.venv\Scripts;C:\Windows\System32
```

Isso significa que o sistema agora começará a procurar primeiro por programas em:

```plaintext
C:\Users\user\code\awesome-project\.venv\Scripts
```

     * @param clearText the output 8-byte plaintext block
     */
    public void decrypt(final byte[] cipherText, final byte[] clearText) {

        decrypt(cipherText, 0, clearText, 0);
    }

    /**
     * encrypts an array where the length must be a multiple of 8
     */
    /**
     * Encrypts an 8-byte block using DES
     * @param clearText the 8-byte plaintext block
     * @return the 8-byte ciphertext block

例如，`PATH` 環境變數可能如下所示：

//// tab | Linux, macOS

```plaintext
/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
```

這意味著系統應該在以下目錄中查找程式：

-   `/usr/local/bin`
-   `/usr/bin`
-   `/bin`
-   `/usr/sbin`
-   `/sbin`

////

//// tab | Windows

```plaintext
C:\Program Files\Python312\Scripts;C:\Program Files\Python312;C:\Windows\System32
```