标签：obj 资源分配 targe erro group ext method HERE 异常
1，几个概念：
2，threading：
thread 模块已被废弃。用户可以使用 threading 模块代替。所以，在 Python3 中不能再使用"thread" 模块。为了兼容性，Python3 将 thread 重命名为 "_thread"。
threading.thread原型：
class threading.Thread(group=None, target=None, name=None, args=(), kwargs={}, *, daemon=None) # group should be None; reserved for future extension when a ThreadGroup class is implemented #target is the callable object to be invoked by the run() method. Defaults to None, meaning nothing is called #name is the thread name. By default, a unique name is constructed of the form “Thread-N” where N is a small decimal number #args is the argument tuple for the target invocation. Defaults to (). #kwargs is a dictionary of keyword arguments for the target invocation. Defaults to {}. #If not None, daemon explicitly sets whether the thread is daemonic. If None (the default), the daemonic property is inherited from the current thread
thread method：
start() #用于启动thread的run方法，每个thread最多只需调用一次start()，如果多次调用，会引起RuntimeError错误 run() #从target和kwargs获取相应的参数，run当前thread，可以通过is_alive查看thread状态是否为alive join(timeout=None) #join用于等待thread结束；join使线程具有阻塞属性，只有当前thread的join结束之后，下一个线程才可以开启 # 默认timeout=None时，线程可能正常或者异常终止；当timeout不为None时，join超时后也会退出 #需要先start再join，否则会报错 is_alive() #返回当前thread的状态，用于判断是否alive
class threading.Lock
acquire(blocking=True, timeout=-1) #用于获取lock锁，默认时阻塞的，timeout=-1表示等待时间无限制；否则按timeout指定值按秒计数等待 release() #release a lock，释放锁
example1：
标签：obj 资源分配 targe erro group ext method HERE 异常
原文地址：https://www.cnblogs.com/zhiminyu/p/12584185.html
