{"id":315885,"date":"2024-05-21T00:12:27","date_gmt":"2024-05-20T16:12:27","guid":{"rendered":""},"modified":"2024-05-21T00:12:36","modified_gmt":"2024-05-20T16:12:36","slug":"python-%e7%9a%84%e5%85%b3%e9%94%ae%e5%ad%97-yield-%e6%9c%89%e5%93%aa%e4%ba%9b%e7%94%a8%e6%b3%95%e5%92%8c%e7%94%a8%e9%80%94-2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/315885.html","title":{"rendered":"Python \u7684\u5173\u952e\u5b57 yield \u6709\u54ea\u4e9b\u7528\u6cd5\u548c\u7528\u9014"},"content":{"rendered":"

\"Python<\/p>\n

Python\u7684\u5173\u952e\u5b57yield<\/code>\u7528\u4e8e\u4ece\u4e00\u4e2a\u51fd\u6570\u8fd4\u56de\u4e00\u4e2a\u751f\u6210\u5668\uff0c\u5141\u8bb8\u51fd\u6570\u6309\u9700\u4ea7\u751f\u4e00\u7cfb\u5217\u503c\u800c\u4e0d\u662f\u4e00\u6b21\u6027\u8fd4\u56de\u5b83\u4eec\u3001\u8fd9\u4e2a\u5173\u952e\u5b57\u4e3b\u8981\u7528\u4e8e\u521b\u5efa\u751f\u6210\u5668\u51fd\u6570\u3001\u5b83\u4e5f\u53ef\u4ee5\u7528\u6765\u4fdd\u6301\u51fd\u6570\u7684\u5c40\u90e8\u72b6\u6001\u3001\u66ff\u4ee3\u4f20\u7edf\u7684\u5217\u8868\u6765\u63d0\u9ad8\u5185\u5b58\u6548\u7387<\/strong>\u3002\u5728\u66f4\u8be6\u7ec6\u7684\u63cf\u8ff0\u4e2d\uff0c\u4f7f\u7528yield<\/code>\u65f6\uff0c\u51fd\u6570\u7684\u6267\u884c\u72b6\u6001\u4f1a\u88ab\u6302\u8d77\uff0c\u76f4\u5230\u751f\u6210\u5668\u7684\u4e0b\u4e00\u4e2a\u503c\u88ab\u8bf7\u6c42\u65f6\uff0c\u5b83\u4f1a\u6062\u590d\u6267\u884c\u3002\u8fd9\u4f7f\u5f97yield<\/code>\u5728\u5904\u7406\u5927\u6570\u636e\u96c6\u6216\u65e0\u9650\u5e8f\u5217\u65f6\u975e\u5e38\u6709\u7528\uff0c\u56e0\u4e3a\u5b83\u4e0d\u9700\u8981\u4e00\u6b21\u5c06\u6240\u6709\u6570\u636e\u8f7d\u5165\u5185\u5b58\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u751f\u6210\u5668\u57fa\u672c\u6982\u5ff5<\/h3>\n<\/p>\n

\u5728\u6df1\u5165yield<\/code>\u7684\u5177\u4f53\u7528\u6cd5\u548c\u7528\u9014\u4e4b\u524d\uff0c\u5148\u6765\u4e86\u89e3\u4e0b\u4ec0\u4e48\u662f\u751f\u6210\u5668\u3002\u751f\u6210\u5668\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u8fed\u4ee3\u5668\uff0c\u5b83\u4f7f\u7528\u51fd\u6570\u4e2d\u7684yield<\/code>\u5173\u952e\u5b57\u6765\u4ea7\u751f\u5e8f\u5217\u4e2d\u7684\u503c\u3002\u4e0e\u666e\u901a\u7684\u51fd\u6570\u4e00\u6b21\u6027\u8fd4\u56de\u6240\u6709\u503c\u4e0d\u540c\uff0c\u751f\u6210\u5668\u51fd\u6570\u6bcf\u6b21\u53ea\u4ea7\u751f\uff08yield\uff09\u4e00\u4e2a\u503c\uff0c\u8fd9\u6837\u53ef\u4ee5\u5904\u7406\u66f4\u5927\u7684\u6570\u636e\u96c6\uff0c\u800c\u4e0d\u4f1a\u8017\u5c3d\u7cfb\u7edf\u5185\u5b58\u3002<\/p>\n<\/p>\n

\u751f\u6210\u5668\u7684\u521b\u5efa<\/h4>\n<\/p>\n

\u751f\u6210\u5668\u53ef\u4ee5\u901a\u8fc7\u5728\u51fd\u6570\u4e2d\u4f7f\u7528yield<\/code>\u8bed\u53e5\u6765\u521b\u5efa\u3002\u5f53\u51fd\u6570\u5305\u542b\u81f3\u5c11\u4e00\u4e2ayield<\/code>\u8bed\u53e5\u65f6\uff0c\u5b83\u5c06\u88ab\u89c6\u4e3a\u751f\u6210\u5668\u51fd\u6570\u3002\u8c03\u7528\u751f\u6210\u5668\u51fd\u6570\u4f1a\u8fd4\u56de\u4e00\u4e2a\u751f\u6210\u5668\u5bf9\u8c61\uff0c\u4f46\u4e0d\u4f1a\u7acb\u5373\u6267\u884c\u51fd\u6570\u4f53\u4e2d\u7684\u4ee3\u7801\u3002<\/p>\n<\/p>\n

def simple_generator():<\/p>\n
    yield 1<\/p>\n
    yield 2<\/p>\n
    yield 3<\/p>\n
gen = simple_generator()  # \u521b\u5efa\u751f\u6210\u5668\u5bf9\u8c61<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u751f\u6210\u5668\u7684\u4f7f\u7528<\/h4>\n<\/p>\n
\u751f\u6210\u5668\u5bf9\u8c61\u88ab\u521b\u5efa\u540e\uff0c\u53ef\u4ee5\u901a\u8fc7\u8fed\u4ee3\u6765\u4f9d\u6b21\u83b7\u53d6\u7531yield<\/code>\u4ea7\u751f\u7684\u503c\u3002\u4e00\u65e6\u751f\u6210\u5668\u7684\u6240\u6709\u503c\u88ab\u6d88\u8017\uff0c\u540e\u7eed\u7684\u8fed\u4ee3\u5c1d\u8bd5\u5c06\u5f15\u53d1\u4e00\u4e2aStopIteration<\/code>\u5f02\u5e38\uff0c\u8868\u793a\u8fed\u4ee3\u5df2\u7ecf\u5b8c\u6210\u3002<\/p>\n<\/p>\n
for value in gen:<\/p>\n
    print(value)  # \u4f9d\u6b21\u6253\u5370\uff1a1\u30012\u30013<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e8c\u3001YIELD\u5173\u952e\u5b57\u7528\u6cd5\u7ec6\u8282<\/h3>\n<\/p>\n
\u73b0\u5728\u6211\u4eec\u6765\u8be6\u7ec6\u63a2\u8ba8yield<\/code>\u7684\u5173\u952e\u7528\u6cd5\u548c\u4e00\u4e9b\u6280\u5de7\uff0c\u4e86\u89e3\u5982\u4f55\u66f4\u9ad8\u6548\u5730\u4f7f\u7528\u8fd9\u4e2a\u5f3a\u5927\u7684\u5173\u952e\u5b57\u3002<\/p>\n<\/p>\n
\u6682\u505c\u4e0e\u6062\u590d\u6267\u884c<\/h4>\n<\/p>\n
yield<\/code>\u53ef\u4ee5\u5728\u751f\u6210\u5668\u51fd\u6570\u4e2d\u6682\u505c\u6267\u884c\u5e76\u4fdd\u5b58\u5f53\u524d\u7684\u6267\u884c\u72b6\u6001\u3002\u6bcf\u6b21\u4ece\u751f\u6210\u5668\u83b7\u53d6\u4e00\u4e2a\u503c\u65f6\uff0c\u51fd\u6570\u4f1a\u4ece\u4e0a\u6b21\u8fd4\u56de\uff08yield\uff09\u7684\u4f4d\u7f6e\u6062\u590d\u6267\u884c\uff0c\u76f4\u5230\u9047\u5230\u4e0b\u4e00\u4e2ayield<\/code>\u8bed\u53e5\u6216\u51fd\u6570\u7ed3\u675f\u3002<\/p>\n<\/p>\n
def count_to_three():<\/p>\n
    yield 1<\/p>\n
    yield 2<\/p>\n
    yield 3<\/p>\n
counter = count_to_three()<\/p>\n
next(counter)  # \u8f93\u51fa1<\/p>\n
next(counter)  # \u8f93\u51fa2<\/p>\n
next(counter)  # \u8f93\u51fa3<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e0e\u666e\u901a\u51fd\u6570\u5bf9\u6bd4<\/h4>\n<\/p>\n
\u4e0e\u8fd4\u56de\u6570\u503c\u5f97\u4f20\u7edf\u51fd\u6570\u5bf9\u6bd4\uff0c\u4f7f\u7528yield<\/code>\u7684\u751f\u6210\u5668\u51fd\u6570\u53ef\u4ee5\u66f4\u8282\u7701\u5185\u5b58\uff0c\u5c24\u5176\u662f\u5728\u5904\u7406\u5927\u578b\u6570\u636e\u96c6\u65f6\u3002\u4f20\u7edf\u51fd\u6570\u4e00\u6b21\u6027\u8fd4\u56de\u6240\u6709\u6570\u636e\uff0c\u800c\u751f\u6210\u5668\u9010\u4e2a\u4ea7\u751f\u3002<\/p>\n<\/p>\n
# \u5e38\u89c4\u51fd\u6570<\/p>\n
def get_numbers(n):<\/p>\n
    return list(range(n))<\/p>\n
\u4f7f\u7528yield\u7684\u751f\u6210\u5668\u51fd\u6570<\/strong><\/h2>\n
def get_numbers_with_yield(n):<\/p>\n
    for i in range(n):<\/p>\n
        yield i<\/p>\n
\u5bf9\u6bd4\u5185\u5b58\u6d88\u8017<\/strong><\/h2>\n
import sys<\/p>\n
print(sys.getsizeof(get_numbers(1000000)))  # \u8f93\u51fa\u975e\u5e38\u5927\u7684\u6570\u503c<\/p>\n
print(sys.getsizeof(get_numbers_with_yield(1000000)))  # \u8f93\u51fa\u8f83\u5c0f\u7684\u6570\u503c<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e09\u3001YIELD\u7684\u9ad8\u7ea7\u7528\u6cd5<\/h3>\n<\/p>\n
yield<\/code>\u7684\u9ad8\u7ea7\u7528\u6cd5\u53ef\u4ee5\u5b9e\u73b0\u66f4\u4e3a\u590d\u6742\u7684\u63a7\u5236\u903b\u8f91\u3002\u901a\u8fc7\u7ed3\u5408send<\/code>\u65b9\u6cd5\u3001throw<\/code>\u65b9\u6cd5\u548cclose<\/code>\u65b9\u6cd5\u53ef\u4ee5\u5bf9\u751f\u6210\u5668\u8fdb\u884c\u66f4\u7cbe\u7ec6\u7684\u64cd\u4f5c\u548c\u5f02\u5e38\u5904\u7406\u3002<\/p>\n<\/p>\n
\u751f\u6210\u5668\u7684send\u65b9\u6cd5<\/h4>\n<\/p>\n
\u751f\u6210\u5668\u7684send<\/code>\u65b9\u6cd5\u53ef\u4ee5\u5411\u751f\u6210\u5668\u53d1\u9001\u4e00\u4e2a\u503c\uff0c\u8be5\u503c\u4f1a\u6210\u4e3ayield<\/code>\u8868\u8fbe\u5f0f\u7684\u7ed3\u679c\u3002\u8fd9\u53ef\u4ee5\u7528\u6765\u4fee\u6539\u751f\u6210\u5668\u7684\u5185\u90e8\u72b6\u6001\u6216\u8005\u57fa\u4e8e\u5916\u90e8\u6761\u4ef6\u52a8\u6001\u51b3\u5b9a\u5e8f\u5217\u4e2d\u7684\u4e0b\u4e00\u4e2a\u503c\u3002<\/p>\n<\/p>\n
def generator_with_send():<\/p>\n
    while True:<\/p>\n
        received_value = (yield)<\/p>\n
        print(f'Received: {received_value}')<\/p>\n
gen = generator_with_send()<\/p>\n
next(gen)  # \u542f\u52a8\u751f\u6210\u5668<\/p>\n
gen.send(10)  # \u8f93\u51fa\uff1aReceived: 10<\/p>\n
gen.send(20)  # \u8f93\u51fa\uff1aReceived: 20<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5904\u7406\u5f02\u5e38<\/h4>\n<\/p>\n
\u4f7f\u7528throw<\/code>\u548cclose<\/code>\u65b9\u6cd5\u53ef\u4ee5\u5728\u751f\u6210\u5668\u51fd\u6570\u4e2d\u629b\u51fa\u6216\u5173\u95ed\u751f\u6210\u5668\uff0c\u5e76\u5904\u7406\u53ef\u80fd\u53d1\u751f\u7684\u5f02\u5e38\u3002<\/p>\n<\/p>\n
def generator_with_exception():<\/p>\n
    try:<\/p>\n
        yield 'Started'<\/p>\n
    except Exception as e:<\/p>\n
        yield f'Exception: {e}'<\/p>\n
    finally:<\/p>\n
        print('Generator closing')<\/p>\n
gen = generator_with_exception()<\/p>\n
print(next(gen))  # \u8f93\u51fa\uff1aStarted<\/p>\n
print(gen.throw(Exception, 'Something went wrong'))  # \u8f93\u51fa\uff1aException: Something went wrong<\/p>\n
gen.close()  # \u8f93\u51fa\uff1aGenerator closing<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u56db\u3001YIELD FROM\u7684\u4f7f\u7528<\/h3>\n<\/p>\n
yield from<\/code>\u662fPython 3.3\u4e2d\u65b0\u589e\u7684\u8bed\u6cd5\uff0c\u7528\u4e8e\u4ece\u53e6\u4e00\u4e2a\u8fed\u4ee3\u5668\u4e2d\u4ea7\u751f\u503c\u3002\u8fd9\u53ef\u4ee5\u7b80\u5316\u751f\u6210\u5668\u4e2d\u5faa\u73af\u8fed\u4ee3\u5176\u4ed6\u8fed\u4ee3\u5668\u7684\u4ee3\u7801\uff0c\u5e76\u4e14\u53ef\u4ee5\u900f\u660e\u5730\u5904\u7406\u5d4c\u5957\u751f\u6210\u5668\u7684\u60c5\u51b5\u3002<\/p>\n<\/p>\n
\u7b80\u5316\u8fed\u4ee3\u5668\u4ee3\u7801<\/h4>\n<\/p>\n
\u4f7f\u7528yield from<\/code>\u53ef\u4ee5\u7b80\u5316\u5bf9\u53e6\u4e00\u4e2a\u8fed\u4ee3\u5668\u7684\u8fed\u4ee3\u8fc7\u7a0b\u3002<\/p>\n<\/p>\n
def generator_range(n):<\/p>\n
    yield from range(n)<\/p>\n
gen = generator_range(5)<\/p>\n
for value in gen:<\/p>\n
    print(value)  # \u4f9d\u6b21\u8f93\u51fa\uff1a0\u30011\u30012\u30013\u30014<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5d4c\u5957\u751f\u6210\u5668<\/h4>\n<\/p>\n
yield from<\/code>\u53ef\u4ee5\u65b9\u4fbf\u5730\u5904\u7406\u751f\u6210\u5668\u4e4b\u95f4\u7684\u5d4c\u5957\u8c03\u7528\uff0c\u5b9e\u73b0\u590d\u6742\u7684\u751f\u6210\u8fc7\u7a0b\u3002<\/p>\n<\/p>\n
def generator1():<\/p>\n
    yield from generator2()<\/p>\n
    yield from generator3()<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e94\u3001YIELD\u7528\u4e8e\u534f\u7a0b<\/h3>\n<\/p>\n
yield<\/code>\u5728Python\u7684\u5f02\u6b65\u7f16\u7a0b\u548c\u534f\u7a0b\uff08coroutines\uff09\u4e2d\u626e\u6f14\u7740\u91cd\u8981\u7684\u89d2\u8272\u3002\u5728\u4f7f\u7528asyncio<\/code>\u5e93\u65f6\uff0cyield<\/code>\u53ef\u4ee5\u7528\u4e8e\u7f16\u5199\u5f02\u6b65\u4ee3\u7801\uff0c\u5141\u8bb8\u4efb\u52a1\u5728\u7b49\u5f85I\/O\u5b8c\u6210\u65f6\u8ba9\u51fa\u63a7\u5236\u6743\uff0c\u5b9e\u73b0\u975e\u963b\u585e\u5e76\u53d1\u6267\u884c\u3002<\/p>\n<\/p>\n
\u5f02\u6b65\u751f\u6210\u5668<\/h4>\n<\/p>\n
\u5728Python 3.5\u53ca\u4ee5\u4e0a\u7248\u672c\uff0c\u53ef\u4ee5\u5c06yield<\/code>\u7528\u5728async def<\/code>\u5b9a\u4e49\u7684\u5f02\u6b65\u51fd\u6570\u4e2d\uff0c\u521b\u5efa\u5f02\u6b65\u751f\u6210\u5668\u3002<\/p>\n<\/p>\n
import asyncio<\/p>\n
async def async_generator():<\/p>\n
    awAI<\/a>t asyncio.sleep(1)<\/p>\n
    yield 'hello'<\/p>\n
    await asyncio.sleep(1)<\/p>\n
    yield 'world'<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u534f\u7a0b\u4e2d\u7684YIELD<\/h4>\n<\/p>\n
yield<\/code>\u5728\u534f\u7a0b\u4e2d\u7528\u4e8e\u7b49\u5f85I\/O\u64cd\u4f5c\uff0c\u8fdb\u800c\u5b9e\u73b0\u5f02\u6b65\u7f16\u7a0b\u7684\u5173\u952e\u6b65\u9aa4\u3002\u901a\u8fc7\u4e0eawait<\/code>\u5173\u952e\u5b57\u7684\u914d\u5408\uff0c\u53ef\u4ee5\u7b49\u5f85\u4e00\u4e2a\u5f02\u6b65\u64cd\u4f5c\u5b8c\u6210\u3002<\/p>\n<\/p>\n
async def fetch_data():<\/p>\n
    data = await some_io_task()  # \u901a\u8fc7await\u7b49\u5f85I\/O\u4efb\u52a1<\/p>\n
    return data<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u603b\u4f53\u800c\u8a00\uff0cPythonyield<\/code>\u5173\u952e\u5b57\u7684\u7075\u6d3b\u6027\u548c\u5f3a\u5927\u7684\u63a7\u5236\u6d41\u80fd\u529b\u4f7f\u5176\u6210\u4e3a\u5904\u7406\u5927\u89c4\u6a21\u6570\u636e\u3001\u521b\u5efa\u590d\u6742\u751f\u6210\u5668\u5e8f\u5217\u548c\u5f02\u6b65\u7f16\u7a0b\u4e0d\u53ef\u6216\u7f3a\u7684\u5de5\u5177\u3002\u901a\u8fc7\u5408\u7406\u8fd0\u7528yield<\/code>\u8bed\u6cd5\uff0c\u4f60\u53ef\u4ee5\u5199\u51fa\u65e2\u9ad8\u6548\u53c8\u6613\u4e8e\u7ef4\u62a4\u7684\u4ee3\u7801\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
1. yield \u5173\u952e\u5b57\u5728\u751f\u6210\u5668\u51fd\u6570\u4e2d\u7684\u7528\u6cd5\u548c\u7528\u9014\u662f\u4ec0\u4e48\uff1f<\/strong><\/p>\n
\u751f\u6210\u5668\u51fd\u6570\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u51fd\u6570\uff0c\u5b83\u53ef\u4ee5\u5728\u8fed\u4ee3\u8fc7\u7a0b\u4e2d\u6682\u505c\u5e76\u8fd4\u56de\u4e2d\u95f4\u7ed3\u679c\uff0c\u800c\u4e0d\u662f\u4e00\u6b21\u6027\u8fd4\u56de\u6240\u6709\u7ed3\u679c\u3002yield \u5173\u952e\u5b57\u5728\u751f\u6210\u5668\u51fd\u6570\u4e2d\u88ab\u7528\u4e8e\u6807\u8bb0\u6682\u505c\u70b9\uff0c\u5f53\u751f\u6210\u5668\u51fd\u6570\u6267\u884c\u5230 yield \u8bed\u53e5\u65f6\uff0c\u7a0b\u5e8f\u4f1a\u6682\u505c\u5e76\u8fd4\u56de\u4e00\u4e2a\u503c\u7ed9\u8c03\u7528\u8005\u3002\u5f53\u518d\u6b21\u8c03\u7528\u751f\u6210\u5668\u51fd\u6570\u65f6\uff0c\u7a0b\u5e8f\u4f1a\u4ece\u4e0a\u4e00\u6b21\u6682\u505c\u7684\u4f4d\u7f6e\u7ee7\u7eed\u6267\u884c\u5e76\u8fd4\u56de\u4e0b\u4e00\u4e2a\u503c\u3002\u8fd9\u79cd\u673a\u5236\u4f7f\u5f97\u751f\u6210\u5668\u51fd\u6570\u80fd\u591f\u5ef6\u8fdf\u8ba1\u7b97\uff0c\u63d0\u4f9b\u4e86\u66f4\u52a0\u9ad8\u6548\u548c\u8282\u7701\u5185\u5b58\u7684\u65b9\u5f0f\u6765\u5904\u7406\u5927\u91cf\u6570\u636e\u3002<\/p>\n
2. yield \u5173\u952e\u5b57\u5728\u534f\u7a0b\u4e2d\u7684\u7528\u6cd5\u548c\u7528\u9014\u662f\u4ec0\u4e48\uff1f<\/strong><\/p>\n
\u534f\u7a0b\u662f\u4e00\u79cd\u8f7b\u91cf\u7ea7\u7684\u591a\u4efb\u52a1\u5904\u7406\u65b9\u5f0f\uff0c\u53ef\u4ee5\u5728\u540c\u4e00\u7ebf\u7a0b\u4e2d\u5b9e\u73b0\u5e76\u53d1\u7f16\u7a0b\u3002Python \u7684 yield \u5173\u952e\u5b57\u5728\u5b9e\u73b0\u534f\u7a0b\u65f6\u7ecf\u5e38\u88ab\u4f7f\u7528\u3002\u901a\u8fc7 yield \u5173\u952e\u5b57\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u63a7\u5236\u6743\u4ea4\u7ed9\u53e6\u4e00\u4e2a\u534f\u7a0b\uff0c\u7136\u540e\u5728\u9002\u5f53\u7684\u65f6\u5019\u518d\u5207\u56de\u6765\u3002\u8fd9\u79cd\u65b9\u5f0f\u4f7f\u5f97\u534f\u7a0b\u53ef\u4ee5\u5728\u9700\u8981\u7b49\u5f85 I\/O \u64cd\u4f5c\u65f6\u4e3b\u52a8\u8ba9\u51fa CPU\uff0c\u63d0\u9ad8\u4e86\u5e76\u53d1\u5904\u7406\u80fd\u529b\u3002yield \u5173\u952e\u5b57\u8fd8\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u534f\u7a0b\u4e4b\u95f4\u7684\u901a\u4fe1\uff0c\u534f\u7a0b\u53ef\u4ee5\u901a\u8fc7 yield \u53d1\u9001\u6570\u636e\u7ed9\u5176\u4ed6\u534f\u7a0b\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7 yield \u63a5\u6536\u5176\u4ed6\u534f\u7a0b\u53d1\u9001\u7684\u6570\u636e\u3002<\/p>\n
3. yield \u5173\u952e\u5b57\u5728\u5f02\u5e38\u5904\u7406\u4e2d\u7684\u7528\u6cd5\u548c\u7528\u9014\u662f\u4ec0\u4e48\uff1f<\/strong><\/p>\n
\u5f53\u4f7f\u7528 yield \u5173\u952e\u5b57\u5b9a\u4e49\u4e00\u4e2a\u751f\u6210\u5668\u51fd\u6570\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u751f\u6210\u5668\u4e2d\u6355\u83b7\u5e76\u5904\u7406\u5f02\u5e38\u3002\u5728\u751f\u6210\u5668\u4e2d\u9047\u5230\u5f02\u5e38\u65f6\uff0cyield \u8bed\u53e5\u4f1a\u6682\u505c\u751f\u6210\u5668\u5e76\u5c06\u5f02\u5e38\u4fe1\u606f\u8fd4\u56de\u7ed9\u8c03\u7528\u8005\uff0c\u8c03\u7528\u8005\u53ef\u4ee5\u6839\u636e\u9700\u8981\u5904\u7406\u5f02\u5e38\u6216\u91cd\u65b0\u629b\u51fa\u5f02\u5e38\u3002\u8fd9\u79cd\u65b9\u5f0f\u5141\u8bb8\u6211\u4eec\u5728\u751f\u6210\u5668\u4e2d\u5bf9\u5f02\u5e38\u8fdb\u884c\u7ec6\u7c92\u5ea6\u7684\u5904\u7406\uff0c\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002\u540c\u65f6\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u4f7f\u7528 yield \u6765\u4f20\u9012\u5f02\u5e38\uff0c\u5373\u5728\u751f\u6210\u5668\u4e2d\u629b\u51fa\u5f02\u5e38\u5e76\u8ba9\u8c03\u7528\u8005\u5904\u7406\uff0c\u8fd9\u79cd\u673a\u5236\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u7279\u5b9a\u7684\u9519\u8bef\u5904\u7406\u903b\u8f91\u6216\u5f02\u5e38\u4f20\u9012\u673a\u5236\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"Python\u7684\u5173\u952e\u5b57yield\u7528\u4e8e\u4ece\u4e00\u4e2a\u51fd\u6570\u8fd4\u56de\u4e00\u4e2a\u751f\u6210\u5668\uff0c\u5141\u8bb8\u51fd\u6570\u6309\u9700\u4ea7\u751f\u4e00\u7cfb\u5217\u503c\u800c\u4e0d\u662f\u4e00\u6b21\u6027\u8fd4\u56de\u5b83\u4eec\u3001\u8fd9\u4e2a […]","protected":false},"author":3,"featured_media":315893,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/315885"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=315885"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/315885\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/315893"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=315885"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=315885"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=315885"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}