Python创建线程池

Python中可以通过threading和concurrent.futures模块来创建线程池。使用threading的方式可以自己手动添加线程到线程池中，而使用concurrent.futures则可以更方便地实现线程池的创建和管理，具体实现可参考以下代码：

使用threading：

import threading

class ThreadPool:
    def __init__(self, num_threads):
        self._threads = [threading.Thread(target=self._worker) for _ in range(num_threads)]
        self._task_queue = []
        self._lock = threading.Lock()

        for thread in self._threads:
            thread.start()

    def submit(self, func, *args, **kwargs):
        self._task_queue.append((func, args, kwargs))

    def _worker(self):
        while True:
            with self._lock:
                if len(self._task_queue) > 0:
                    task = self._task_queue.pop()
                else:
                    continue
            func, args, kwargs = task
            func(*args, **kwargs)

# Example usage
def print_message(msg):
    print(f"Message: {msg}")

thread_pool = ThreadPool(num_threads=4)
for i in range(10):
    thread_pool.submit(print_message, f"Hello from thread {i}")

# Output
# Message: Hello from thread 0
# Message: Hello from thread 1
# Message: Hello from thread 2
# Message: Hello from thread 3
# Message: Hello from thread 4
# Message: Hello from thread 5
# Message: Hello from thread 6
# Message: Hello from thread 7
# Message: Hello from thread 8
# Message: Hello from thread 9

使用concurrent.futures：

from concurrent.futures import ThreadPoolExecutor

# Example usage
def print_message(msg):
    print(f"Message: {msg}")

with ThreadPoolExecutor(max_workers=4) as executor:
    for i in range(10):
        executor.submit(print_message, f"Hello from thread {i}")

# Output
# Message: Hello from thread 0
# Message: Hello from thread 1
# Message: Hello from thread 2
# Message: Hello from thread 3
# Message: Hello from thread 4
# Message: Hello from thread 5
# Message: Hello from thread 6
# Message: Hello from thread 7
# Message: Hello from thread 8
# Message: Hello from thread 9

以上代码只是一个简单的示例，线程池在实际应用中需要根据具体的场景进行合理的设计和使用。