66.python使用yield进行异步操作

1.yield协成:

# 本来想使用协成但是发现效果差不多
 def get_coroutine(f):
     def wrapper(*args, **kwargs):
         gen = f(*args)  # retfunc
         r = gen.__next__()  # 激活生成器函数delete_docker
        def inner(g):
             try:
                 g.__next__()  # 调用delete_docker.__next__(),去执行耗时操作
                 print("完成IO操作----------------------")
                 # gen.send(ret)  # 如果有需求可以send值
             except StopIteration:
                 pass
         # 产生一个线程去执行,耗时操作
         threading.Thread(target=inner, args=(r,)).start()
         # 执行retfunc.__next__()先一步将taskFinally的结果返回给前端
         response = gen.__next__()
         return response
     return wrapper

 @get_coroutine
 def retfunc(info, D, linux):
     ret = taskFinally(info, D)
     yield delete_docker(info, linux)
     yield ret
    
def taskFinally():
    pass

def delete_docker(info, linux):
    """删除docker容器"""
    try:
        linux = linux
        linux.LinuxSend('docker rm -f %s' % info['dockername'])
        if re.search(info['dockername'], linux.LinuxSend('docker ps -a')):
            print('docker删除失败')
        else:
            global ip_list
            ip_list.remove(info["dockerip"])
            print('docker删除成功', info["dockerip"])
        linux.LinuxClose()
    except:
        linux.LinuxClose()
        print('docker删除失败')
 	finally:
        yield