result = asyncio.run(async_function()) print(result) # 输出: Result ``` ### 9.3 协程嵌套 当在一个协程中调用另一个协程时,务必使用`await`: ```python async def inner_coroutine(): await asyncio.sleep(1) return "Inner result" async def outer_coroutine(): result = await inner_coroutine(...
exc_type, exc_value, traceback): print("Exiting the context") await asyncio.sleep(1) async def main(): async with AsyncContextManager() as manager: print("Inside the context") asyncio.run(main()) # 输出:
The last line of the program asyncio.run(main()) runs main(). This creates what’s known as an event loop). It’s this loop that will run main(), which in turn will run the two instances of task(). The event loop is at the heart of the Python async system. It runs all the...
__Python.NoneType__.DataChanged$41(System.Runtime.CompilerServices.Closure None, IronPython.Runtime.PythonFunction None, System.Object None) __Python.NoneType__._Scripting_(System.Object[] None, System.Object None) Kingdee.BOS.Core.Util.PythonUtil.InvokePy(Microsoft.Scripting.Hosting.ScriptScope scope...
You can't use the Pythonasyncfunction type for your handler function. Optionally, a handler can return a value, which must be JSON serializable. Common return types includedict,list,str,int,float, andbool. What happens to the returned value depends on theinvocation typeand theservicethat invoke...
The secret behind Python's async support is that it's just an event loop running on top of good, old, synchronous Python. Here's how to run an async function like the above: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 async def get_chat_id(name): await asyncio.sleep(3) ...
Run queries, run procedures, insert data, etc. """# Increment indentglobalindent offset="\t"*indent indent+=1# MySQL operationsprint(f"{offset}START_MYSQL_OPS")asyncwithawaitconnect(**config)ascnx:asyncwithawaitcnx.cursor()ascur:awaitcur.execute("SELECT @@version")res=awaitcur.fetchone()...
Now, open another terminal window or command prompt and run the client: Shell $ python echo-client.py Received b'Hello, world' In the server window, you should notice something like this: Shell $ python echo-server.py Connected by ('127.0.0.1', 64623) In the output above, the ...
importasyncio# 这是一个普通函数defnormal_function():return"Hello"# 这是一个协程asyncdefcoroutine_f...
使用async def定义的函数是一个coroutine,这个函数内部可以用await关键字。 使用async def定义的函数,调用之后返回的值,是一个coroutine对象,可以被用于await或者asyncio.run等 我们可以看到: 第一层含义是语法层面的概念,一个函数(一段代码)由async def定义,那么它就是一个coroutine。带来的效果是,这个函数内部可以用...