classAsyncIterator:def__init__(self):self.count=0asyncdef__aiter__(self):returnselfasyncdef__anext__(self):ifself.count<5:self.count+=1returnself.countelse:raiseStopAsyncIterationasyncdefasync_for_example():asyncfornumberinAsyncIterator():print(number)asyncio.run(async_for_example()) async ...
import asyncio async def get_range(): for i in range(10): print(f"start {i}") await asyncio.sleep(1) print(f"end {i}") yield i class AIter: def __init__(self, N): self.i = 0 self.N = N def __aiter__(self): return self async def __anext__(self): i = self.i ...
写这篇文章是受 xinghun85 的这篇博客 的启发, 但是人家后面写的东西跳跃太快, 有点没看懂, 自己在...
importunittestimportasyncioclassTestAsyncFunctions(unittest.TestCase):deftest_async_recursive(self):asyncdefwrapper():awaitasync_recursive(3)asyncio.run(wrapper())deftest_async_for(self):asyncdefwrapper():awaitasync_for_example()asyncio.run(wrapper())if__name__=='__main__':unittest.main() 1. ...
(self.maximum) self.step = 0 def __aiter__(self): return self # @asyncio.coroutine async def __anext__(self): self.step += 1 if self.step > 12: raise StopAsyncIteration return self.Alist[self.step]**2 async def echo_odd_of(num): async for i in MyOdd(num): print(i) ...
asyncfordataincursor: ... AI代码助手复制代码 这里的cursor是一个异步迭代器,能够从一个数据库中每经过N次迭代预取N行数据。 下面的语法展示了这种新的异步迭代协议的用法: classCursor:def__init__(self): self.buffer = collections.deque()asyncdef_prefetch(self): ...
对于for循环,在异步编程中也可以使用,但是需要使用异步迭代器。异步迭代器允许在异步代码中迭代对象,例如异步生成器或异步列表等。 下面是一个使用异步迭代器的示例: python async def async_for_example(numbers): for number in numbers: await asyncio.sleep(number) print(number) numbers = [1, 2, 3, 4,...
async for的使用 import random import asyncio async def random_number_gen(delay, start, end): while True: yield random.randint(start, end) await asyncio.sleep(delay) async def main(): async for i in random_number_gen(1, 0, 100): print(i) try: print("Starting to print out random ...
async for的使用 import random import asyncio async def random_number_gen(delay, start, end): while True: yield random.randint(start, end) await asyncio.sleep(delay) async def main(): async for i in random_number_gen(1, 0, 100): print(i) try: print("Starting to print out random ...