"""A coroutine wrapped in a Future.""" def __init__(self, coro, *, loop=None, name=None): super().__init__(loop=loop) # Task必须用协程作为参数进行实例化 if not coroutines.iscoroutine(coro): raise TypeError(f"a coroutine was expected, got {coro!r}") #设置一些类的属性 self._...
_source_traceback: del self._source_traceback[-1] if not coroutines.iscoroutine(coro): self._log_destroy_pending = False raise TypeError(f"a coroutine was expected, got {coro!r}") if name is None: self._name = f'Task-{_task_name_counter()}' else: self._name = str(name) self...
_PyFuture): """A coroutine wrapped in a Future.""" def __init__(self, coro, *, loop=None, name=None): super().__init__(loop=loop) # Task必须用协程作为参数进行实例化 if not coroutines.iscoroutine(coro): raise TypeError(f"a coroutine was expected, got {coro!r}") #设置一些类...
defrun(main, *, debug=False):ifevents._get_running_loop()isnotNone:# 获取当前是否含有 loopraiseRuntimeError("asyncio.run() cannot be called from a running event loop")ifnotcoroutines.iscoroutine(main):# 判断是否是一个 coroutineraiseValueError("a coroutine was expected, got {!r}".format(...
if not coroutines.iscoroutine(main): raise ValueError("a coroutine was expected, got {!r}".format(main)) loop = events.new_event_loop() try: events.set_event_loop(loop) loop.set_debug(debug) return loop.run_until_complete(main) ...
def run(main, *, debug=False): if events._get_running_loop() is not None: raise RuntimeError( "asyncio.run() cannot be called from a running event loop") if not coroutines.iscoroutine(main): raise ValueError("a coroutine was expected, got {!r}".format(main)) loop = events.new_...
defrun(main, *, debug=False):ifevents._get_running_loop()isnotNone:raiseRuntimeError("asyncio.run() cannot be called from a running event loop")ifnotcoroutines.iscoroutine(main):raiseValueError("a coroutine was expected, got {!r}".format(main)) ...
# # A coroutine object is created but not awaited, # # so it *won't run at all*. # # Let's do it differently now and await it: # print(await nested()) # will print "42". # # asyncio.run(main()) ''' 协程函数: 定义形式为 async def 的函数; 协程对象: 调用 协程函数 所返...
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In this tutorial, you'll learn how to add time delays to your Python programs. You'll use decorators and the built-in time module to add Python sleep() calls to your code. Then, you'll discover how time delays work with threads, asynchronous functions, a