python語法記錄
阿新 • • 發佈：2017-07-04
獲取 under clas 創建 col variable span until erl
class threading.Condition(lock=None)
This class implements condition variable objects. A condition variable allows one or more threads to wait until they are notified by another thread.
If the lock argument is given and not None, it must be a Lock or RLock object, and it is used as the underlying lock
Otherwise, a new RLock object is created and used as the underlying lock.
也就是說，如果condition構造函數lock參數為空的話，會自動創建可重入鎖RLock。
可重入鎖RLock，同一線程可以多次獲取（the same thread may acquire it again without blocking）。
python語法記錄