```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
```

```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
```

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
```

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。

////

激活虚拟环境后，`PATH` 变量会变成这样：

//// tab | Linux, macOS

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

这意味着系统现在会首先在以下目录中查找程序：

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

然后再在其他目录中查找。

因此，当你在终端中输入 `python` 时，系统会在以下目录中找到 Python 程序：

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

并使用这个。

////

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

시스템은 가장 먼저 다음 경로에서 프로그램을 찾기 시작합니다:

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

그 후에 다른 디렉터리들을 탐색합니다.

따라서 터미널에 `python`을 입력하면, 시스템은 다음 위치에 있는 Python 프로그램을 찾게 됩니다:

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

* Make sure you have well defined Pydantic models for your request bodies and responses.
* Configure any required permissions and roles using dependencies.
* Never store plaintext passwords, only password hashes.
* Implement and use well-known cryptographic tools, like pwdlib and JWT tokens, etc.
* Add more granular permission controls with OAuth2 scopes where needed.
* ...etc.

##### Figure 1 - Secure Channel construction

```
plaintext   := chunk_0          ||       chunk_1          ||       chunk_2          ||       ...

At this point we have the user data from our database, but we haven't checked the password.

Let's put that data in the Pydantic `UserInDB` model first.

You should never save plaintext passwords, so, we'll use the (fake) password hashing system.

If the passwords don't match, we return the same error.

#### Password hashing { #password-hashing }