PyFrameObject*f = gen->gi_frame; PyObject*result;if(gen->gi_running) {#判断生成器是否已经运行PyErr_SetString(PyExc_ValueError,"generator already executing");returnNULL; }if(f==NULL || f->f_stacktop == NULL) {#如果代码块为空或调用栈为空,则抛出StopIteration异常/* Only set exceptionifc...
StopIteration 正确的方法是使用for循环,因为generator也是可迭代对象: >>> g = (x * x for x in range(10)) >>> for n in g: ... print(n) ... 函数和generator仅一步之遥。要把fib函数变成generator,只需要把print(b)改为yield b就可以了 def fib(max): #第一步 n,a,b = 0,0,1 while...
"generator already executing");returnNULL;}if(f==NULL||f->f_stacktop==NULL){// 如果代码块为...
(PyExc_ValueError, "generator already executing"); return NULL; } if (f==NULL || f->f_stacktop == NULL) { # 如果代码块为空或调用栈为空,则抛出StopIteration异常 /* Only set exception if called from send() */ if (arg && !exc) PyErr_SetNone(PyExc_StopIteration); return NULL; } ...
您可以从 asyncio 程序中的协程创建任务对象。任务提供独立调度和运行的协程的句柄，并允许查询、取消任务...
(self):'''Run until there are no more tasks'''whileself._task_queue:task=self._task_queue.popleft()try:# Run until the next yield statementnext(task)self._task_queue.append(task)exceptStopIteration:# Generator is no longer executingpass# Example usesched=TaskScheduler()sched.new_task(...
To grab the number generator’s output to use later, you can pass in a capture_output=True argument to run():Python >>> import subprocess >>> magic_number_process = subprocess.run( ... ["python", "magic_number.py"], capture_output=True ... ) >>> magic_number_process.stdout b...
greenlet是一个用C实现的协程模块,相比与Python自带的yield,它可以使你在任意函数之间随意切换,而不需把这个函数先声明为generator。(注:需要用pip安装包;pip install gevent) 1from greenlet import greenlet 2import time 345def A():6while1:7print('---A---')8 time.sleep(0.5)9 g2.switch()101112...
第一步:将下面的代码复制下来,保存为一个名叫的HTMLTestRunner.py文件。 # coding=utf-8 """ A TestRunner for use with the Python unit testing framework. It generates a HTML report to show the result at a glance. The simplest way to use this is to invoke its main method. E.g. import un...
(url, content=stream_generator(file_path)) return response async def stream_response(response): if response.status_code == 200: async for chunk in response.aiter_raw(): print(f"Received chunk: {len(chunk)} bytes") else: print(f"Error: {response}") async def main(): print('helloworld...