Python language Learning (eight) 1.1

Thread module: Partial Bottom

Threading module: High-level, provides synchronization mechanism such as lock

Inherit threading. Thread

Run () method/target = function_name

Join (): suspends the current thread until the called thread ends

Start (): Starts the thread, executes the code in run

Threading.current_thread (): Thread number of the currently running thread

Synchronization mechanism:

Threading. Lock (exclusive lock, exclusive lock)

Threading. Rlock (can be re-entered lock, the same thread can be obtained multiple times)

Threading. Semaphone (semaphore, shared lock, number of shares)

Init_value: Number of shares

Threading.condition (provides a wait mechanism to implement a wait queue)

Wait

Notify, Notify_all

Acquire (): Request a lock

Release (): Releasing the lock

Multiprocessing Module

Multiple Python processes = multiple Gil locks

Inherit multiprocessing. Process

Implementing the Run () method

Join (): suspends the current process until the called process ends

Start (): Starts the process, executes the code in run

Inter-process communication

The memory space of the process is independent of each other

Through multiprocessing. Queue Implementation Communication

Queue.put ()

Queue.get ()

Python language Learning (eight) 1.1