How do you use the threading module in Python?

2 years ago
Sophia Anderson
1 minute

In Python, the threading module is used for implementing multi-threaded programming. Below are some common operations using the threading module.

  1. Import the threading module.
import threading
  1. The methods of creating threads:
  1. Create a thread object using the Thread class and pass a callable function as the thread’s execution body.
thread = threading.Thread(target=函数名, args=参数)
  1. Inherit the Thread class, create a custom thread class, and override the run() method to define the execution logic of the thread.
class MyThread(threading.Thread):
    def run(self):
        # 线程的执行逻辑
  1. Start the thread.
thread.start()
  1. Wait for the thread to finish.
thread.join()
  1. Thread synchronization:
  1. Synchronize threads using Lock objects.
lock = threading.Lock()

# 在临界区前获取锁
lock.acquire()
# 在临界区内执行操作
# 在临界区后释放锁
lock.release()
  1. Using the Condition object for thread synchronization.
condition = threading.Condition()

# 在临界区前获取锁
condition.acquire()
# 在临界区内执行操作
# 在临界区后释放锁
condition.release()

# 等待条件满足
condition.wait()

# 唤醒一个等待的线程
condition.notify()

# 唤醒所有等待的线程
condition.notifyAll()
  1. Inter-process communication:
  1. Communicate between threads using the Queue object.
queue = Queue()

# 向队列中添加元素
queue.put(item)

# 从队列中获取元素
item = queue.get()

In multithreading programming, it is important to consider thread safety and synchronization of resource access to avoid issues such as race conditions.

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