* Và còn nhiều thứ khác nữa

## Kết luận

Nếu bạn đã đọc và hiểu hết những điều này, khá chắc là bây giờ bạn đã **biết nhiều hơn** về môi trường ảo so với kha khá lập trình viên khác đấy. 🤓

   * segments, each governed by its own write lock. The segment lock is taken once for each explicit
   * write, and twice for each cache loading computation (once prior to loading the new value, and
   * once after loading completes). Much internal cache management is performed at the segment
   * granularity. For example, access queues and write queues are kept per segment when they are

	g()
}
</pre>

<p>
it can happen that <code>g</code> prints <code>2</code> and then <code>0</code>.
</p>

<p>
This fact invalidates a few common idioms.
</p>

<p>
Double-checked locking is an attempt to avoid the overhead of synchronization.
For example, the <code>twoprint</code> program might be
incorrectly written as:
</p>

<pre>
var a string
var done bool

func setup() {

	}

	switch event.Action {
	case lifecycle.DeleteAllVersionsAction, lifecycle.DelMarkerDeleteAllVersionsAction:
		// Skip if bucket has object locking enabled; To prevent the
		// possibility of violating an object retention on one of the
		// noncurrent versions of this object.
		if lr.LockEnabled {
			return lifecycle.Event{Action: lifecycle.NoneAction}
		}

`uv` では以下のような多くのことができます：

* 異なるバージョンも含めた**Python のインストール**
* プロジェクトごとの**仮想環境**の管理
* **パッケージ**のインストール
* プロジェクトのパッケージの**依存関係やバージョン**の管理
* パッケージとそのバージョンの、依存関係を含めた**厳密な**組み合わせを保持し、これによって、本番環境で、開発環境と全く同じようにプロジェクトを実行できる（これは**locking**と呼ばれます）
* その他のさまざまな機能

## まとめ

ここまで読みすべて理解したなら、世間の多くの開発者と比べて、仮想環境について**あなたはより多くのことを知っています**。🤓

                // this is so damn unreliable, needs another race-prone query if required
                haveAttributes = false;

                // This seems to be the only way to obtain a reliable (with respect to locking) file size here
                // It is more critical than other attributes because append mode depends on it.
                // We do only really care if we open for writing and not shared for writing

					Versioning:          globalBucketVersioningSys.Enabled(bucket.Name),
					VersioningSuspended: globalBucketVersioningSys.Suspended(bucket.Name),
					Replication:         rcfg != nil,
					Locking:             lcfg.LockEnabled,
					Quota:               quota,
					Tagging:             tcfg,
				},
				Access: madmin.AccountAccess{
					Read:  rd,
					Write: wr,
				},
			})
		}

	}

	rcfg, _ := globalBucketObjectLockSys.Get(bucket)
	if rcfg.LockEnabled && opts.DeletePrefix {
		apiErr := toAPIError(ctx, errInvalidArgument)
		apiErr.Description = "force-delete is forbidden on Object Locking enabled buckets"
		writeErrorResponse(ctx, w, apiErr, r.URL)
		return
	}

	os := newObjSweeper(bucket, object).WithVersion(opts.VersionID).WithVersioning(opts.Versioned, opts.VersionSuspended)

handlers = java.util.logging.ConsoleHandler

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