# 虛擬環境

當你在 Python 專案中工作時，你可能會需要使用一個**虛擬環境**（或類似的機制）來隔離你為每個專案安裝的套件。

/// info

如果你已經了解虛擬環境，知道如何建立和使用它們，你可以考慮跳過這一部分。🤓

///

/// tip

**虛擬環境**和**環境變數**是不同的。

**環境變數**是系統中的一個變數，可以被程式使用。

**虛擬環境**是一個包含一些檔案的目錄。

///

/// info

這個頁面將教你如何使用**虛擬環境**以及了解它們的工作原理。

如果你計畫使用一個**可以為你管理一切的工具**（包括安裝 Python），試試 <a href="https://github.com/astral-sh/uv" class="external-link" target="_blank">uv</a>。

///

my_user: User = User(id=3, name="John Doe", joined="2018-07-19")

second_user_data = {
    "id": 4,
    "name": "Mary",
    "joined": "2018-11-30",
}

my_second_user: User = User(**second_user_data)
```

/// info

`**second_user_data` nghĩa là:

Truyền các khóa và giá trị của dict `second_user_data` trực tiếp như các tham số kiểu key-value, tương đương với: `User(id=4, name="Mary", joined="2018-11-30")`

///

<div class="termy">

```console
$ pip install pyjwt

---> 100%
```

</div>

/// info | Informação

Se você pretente utilizar algoritmos de assinatura digital como o RSA ou o ECDSA, você deve instalar a dependência da biblioteca de criptografia `pyjwt[crypto]`.

    /**
     * Outputs a log message using the statistics logger.
     *
     * @param buf the string buffer containing the log message
     */
    protected void log(final StringBuilder buf) {
        statsLogger.info(buf.toString());
    }

    /**
     * Sets the name of the logger used for statistics output.
     *
     * @param loggerName the logger name to use
     */

        this.andx.setUseUnicode(this.isUseUnicode());
        if (this.andx instanceof AndXServerMessageBlock) {

            /*
             * A word about communicating header info to andx smbs
             *
             * This is where we recursively invoke the provided andx smb
             * object to write it's parameter words and bytes to our outgoing

<div class="termy">

```console
$ pip install pyjwt

---> 100%
```

</div>

/// info

If you are planning to use digital signature algorithms like RSA or ECDSA, you should install the cryptography library dependency `pyjwt[crypto]`.

	return db.Session(&Session{Context: ctx})
}

// Debug start debug mode
func (db *DB) Debug() (tx *DB) {
	tx = db.getInstance()
	return tx.Session(&Session{
		Logger: db.Logger.LogMode(logger.Info),
	})
}

// Set store value with key into current db instance's context
func (db *DB) Set(key string, value interface{}) *DB {
	tx := db.getInstance()
	tx.Statement.Settings.Store(key, value)
	return tx

my_user: User = User(id=3, name="John Doe", joined="2018-07-19")

second_user_data = {
    "id": 4,
    "name": "Mary",
    "joined": "2018-11-30",
}

my_second_user: User = User(**second_user_data)
```

/// info

`**second_user_data` quer dizer:

Passe as chaves e valores do dicionário `second_user_data` diretamente como argumentos chave-valor, equivalente a: `User(id=4, name="Mary", joined="2018-11-30")`

///

Tú y tu crush comen las hamburguesas y pasan un buen rato. ✨

<img src="/img/async/concurrent-burgers/concurrent-burgers-07.png" class="illustration">

/// info | Información

Hermosas ilustraciones de <a href="https://www.instagram.com/ketrinadrawsalot" class="external-link" target="_blank">Ketrina Thompson</a>. 🎨

///

---

			// n is length of comment
			n := int(b[i+directoryEndLen-2]) | int(b[i+directoryEndLen-1])<<8
			if n+directoryEndLen+i > len(b) {
				// Truncated comment.
				// Some parsers (such as Info-ZIP) ignore the truncated comment
				// rather than treating it as a hard error.
				return -1
			}
			return i
		}
	}
	return -1
}

type readBuf []byte