{"id":68,"date":"2026-06-13T16:56:51","date_gmt":"2026-06-13T08:56:51","guid":{"rendered":"https:\/\/www.52runoob.com\/?p=68"},"modified":"2026-06-13T16:56:51","modified_gmt":"2026-06-13T08:56:51","slug":"python3-%e8%bf%ad%e4%bb%a3%e5%99%a8%e4%b8%8e%e7%94%9f%e6%88%90%e5%99%a8","status":"publish","type":"post","link":"https:\/\/www.52runoob.com\/index.php\/2026\/06\/13\/python3-%e8%bf%ad%e4%bb%a3%e5%99%a8%e4%b8%8e%e7%94%9f%e6%88%90%e5%99%a8\/","title":{"rendered":"Python3 \u8fed\u4ee3\u5668\u4e0e\u751f\u6210\u5668"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u5728 Python 3 \u4e2d\uff0c<strong>\u8fed\u4ee3\u5668 (Iterator)<\/strong> \u4e0e <strong>\u751f\u6210\u5668 (Generator)<\/strong> \u662f\u8bed\u8a00\u4e2d\u6700\u6838\u5fc3\u3001\u6700\u4f18\u96c5\u7684\u9ad8\u7ea7\u7279\u6027\u4e4b\u4e00\u3002\u5b83\u4eec\u662f\u5b9e\u73b0<strong>\u60f0\u6027\u6c42\u503c (Lazy Evaluation)<\/strong> \u7684\u57fa\u77f3\uff0c\u4f7f\u5f97 Python \u80fd\u591f\u4ee5\u6781\u4f4e\u7684\u5185\u5b58\u5360\u7528\u4f18\u96c5\u5730\u5904\u7406\u6d77\u91cf\u6570\u636e\u3001\u65e0\u9650\u5e8f\u5217\u4ee5\u53ca\u590d\u6742\u7684\u6570\u636e\u6d41\u7ba1\u9053\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u638c\u63e1\u8fd9\u4e24\u8005\uff0c\u4e0d\u4ec5\u662f\u7406\u89e3 Python <code>for<\/code> \u5faa\u73af\u5e95\u5c42\u673a\u5236\u7684\u5173\u952e\uff0c\u66f4\u662f\u8fc8\u5411\u9ad8\u7ea7 Python \u5f00\u53d1\uff08\u5982\u5f02\u6b65\u7f16\u7a0b\u3001\u534f\u7a0b\u3001\u5927\u6570\u636e\u5904\u7406\uff09\u7684\u5fc5\u7ecf\u4e4b\u8def\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0b\u662f\u5bf9 Python 3 \u8fed\u4ee3\u5668\u4e0e\u751f\u6210\u5668\u7684\u5168\u9762\u3001\u6df1\u5ea6\u89e3\u6790\uff0c\u6db5\u76d6\u6982\u5ff5\u8fa8\u6790\u3001\u5e95\u5c42\u539f\u7406\u3001\u9ad8\u7ea7\u7279\u6027\u53ca\u6700\u4f73\u5b9e\u8df5\u3002\uff08\u672c\u6587\u7bc7\u5e45\u8f83\u957f\uff0c\u65e8\u5728\u63d0\u4f9b\u4e00\u4efd\u53ef\u4f5c\u4e3a\u751f\u4ea7\u73af\u5883\u53c2\u8003\u624b\u518c\u7684\u6df1\u5ea6\u6307\u5357\uff09<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e00\u3001 \u6838\u5fc3\u6982\u5ff5\u8fa8\u6790\uff1aIterable vs Iterator<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u6df1\u5165\u4ee3\u7801\u4e4b\u524d\uff0c\u5fc5\u987b\u4e25\u683c\u533a\u5206\u4e24\u4e2a\u7ecf\u5e38\u88ab\u6df7\u6dc6\u7684\u6982\u5ff5\uff1a<strong>\u53ef\u8fed\u4ee3\u5bf9\u8c61 (Iterable)<\/strong> \u548c <strong>\u8fed\u4ee3\u5668 (Iterator)<\/strong>\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">1. \u53ef\u8fed\u4ee3\u5bf9\u8c61 (Iterable)<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5b9a\u4e49<\/strong>\uff1a\u4efb\u4f55\u53ef\u4ee5\u8fd4\u56de\u4e00\u4e2a\u8fed\u4ee3\u5668\u7684\u5bf9\u8c61\u3002\u901a\u4fd7\u5730\u8bf4\uff0c\u5c31\u662f<strong>\u53ef\u4ee5\u653e\u5728 <code>for<\/code> \u5faa\u73af <code>in<\/code> \u5173\u952e\u5b57\u540e\u9762\u7684\u5bf9\u8c61<\/strong>\u3002<\/li>\n\n\n\n<li><strong>\u5e95\u5c42\u534f\u8bae<\/strong>\uff1a\u5b9e\u73b0\u4e86 <code>__iter__()<\/code> \u65b9\u6cd5\u7684\u5bf9\u8c61\u3002\u8c03\u7528\u8be5\u65b9\u6cd5\u4f1a\u8fd4\u56de\u4e00\u4e2a\u8fed\u4ee3\u5668\u3002<\/li>\n\n\n\n<li><strong>\u5e38\u89c1\u793a\u4f8b<\/strong>\uff1a<code>list<\/code>, <code>tuple<\/code>, <code>str<\/code>, <code>dict<\/code>, <code>set<\/code>, <code>range<\/code> \u5bf9\u8c61\uff0c\u4ee5\u53ca\u6253\u5f00\u7684\u6587\u4ef6\u5bf9\u8c61\u3002<\/li>\n\n\n\n<li><strong>\u9a8c\u8bc1\u65b9\u6cd5<\/strong>\uff1a\u4f7f\u7528 <code>collections.abc.Iterable<\/code> \u8fdb\u884c\u5224\u65ad\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">2. \u8fed\u4ee3\u5668 (Iterator)<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5b9a\u4e49<\/strong>\uff1a\u8868\u793a\u6570\u636e\u6d41\u7684\u5bf9\u8c61\u3002\u5b83\u8d1f\u8d23<strong>\u5b9e\u9645\u6267\u884c\u8fed\u4ee3\u8fc7\u7a0b<\/strong>\uff0c\u6bcf\u6b21\u4ea7\u51fa\u4e0b\u4e00\u4e2a\u503c\uff0c\u76f4\u5230\u6ca1\u6709\u6570\u636e\u4e3a\u6b62\u3002<\/li>\n\n\n\n<li><strong>\u5e95\u5c42\u534f\u8bae<\/strong>\uff1a\u5fc5\u987b\u540c\u65f6\u5b9e\u73b0\u4e24\u4e2a\u65b9\u6cd5\uff1a\n<ol class=\"wp-block-list\">\n<li><code>__iter__()<\/code>: \u8fd4\u56de\u8fed\u4ee3\u5668\u81ea\u8eab\uff08\u8fd9\u4f7f\u5f97\u8fed\u4ee3\u5668\u672c\u8eab\u4e5f\u662f\u53ef\u8fed\u4ee3\u7684\uff09\u3002<\/li>\n\n\n\n<li><code>__next__()<\/code>: \u8fd4\u56de\u6570\u636e\u6d41\u4e2d\u7684\u4e0b\u4e00\u4e2a\u503c\u3002\u5982\u679c\u6ca1\u6709\u66f4\u591a\u6570\u636e\uff0c\u5fc5\u987b\u629b\u51fa <code>StopIteration<\/code> \u5f02\u5e38\u3002<\/li>\n<\/ol>\n<\/li>\n\n\n\n<li><strong>\u9a8c\u8bc1\u65b9\u6cd5<\/strong>\uff1a\u4f7f\u7528 <code>collections.abc.Iterator<\/code> \u8fdb\u884c\u5224\u65ad\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">3. \u5b83\u4eec\u7684\u5173\u7cfb<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6240\u6709\u7684\u8fed\u4ee3\u5668\u90fd\u662f\u53ef\u8fed\u4ee3\u5bf9\u8c61\uff0c\u4f46\u5e76\u975e\u6240\u6709\u7684\u53ef\u8fed\u4ee3\u5bf9\u8c61\u90fd\u662f\u8fed\u4ee3\u5668\u3002<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5217\u8868 <code>[1, 2, 3]<\/code> \u662f Iterable\uff0c\u4f46<strong>\u4e0d\u662f<\/strong> Iterator\uff08\u5b83\u6ca1\u6709 <code>__next__<\/code> \u65b9\u6cd5\uff09\u3002<\/li>\n\n\n\n<li>\u901a\u8fc7 <code>iter([1, 2, 3])<\/code> \u83b7\u5f97\u7684\u5bf9\u8c61\uff0c\u65e2\u662f Iterator\uff0c\u4e5f\u662f Iterable\u3002<\/li>\n<\/ul>\n\n\n\n<div class=\"chp-code-block chp-theme-github-dark chp-wrap-on\" data-chp-language=\"plaintext\" data-chp-line-start=\"1\" data-chp-highlight=\"\"><div class=\"chp-toolbar\"><div class=\"chp-toolbar-left\"><span class=\"chp-dots\"><span><\/span><span><\/span><span><\/span><\/span><span class=\"chp-language-label\">\u7eaf\u6587\u672c<\/span><\/div><div class=\"chp-toolbar-right\"><button type=\"button\" class=\"chp-copy-btn\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><svg class=\"chp-icon-copy\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z\"\/><\/svg><svg class=\"chp-icon-check\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\" style=\"display:none;\"><path fill=\"currentColor\" d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><span class=\"chp-copy-text\">\u590d\u5236<\/span><\/button><\/div><\/div><div class=\"chp-code-wrapper\"><div class=\"chp-line-numbers\" aria-hidden=\"true\"><span>1<\/span><span>2<\/span><span>3<\/span><span>4<\/span><span>5<\/span><span>6<\/span><span>7<\/span><span>8<\/span><span>9<\/span><span>10<\/span><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">from collections.abc import Iterable, Iterator\n\nmy_list = [1, 2, 3]\nmy_iter = iter(my_list)\n\nprint(isinstance(my_list, Iterable))   # True\nprint(isinstance(my_list, Iterator))   # False (\u5217\u8868\u672c\u8eab\u4e0d\u662f\u8fed\u4ee3\u5668)\n\nprint(isinstance(my_iter, Iterable))   # True\nprint(isinstance(my_iter, Iterator))   # True<\/code><\/pre><\/div><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e8c\u3001 <code>for<\/code> \u5faa\u73af\u7684\u5e95\u5c42\u771f\u76f8<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u7406\u89e3\u4e86\u4e0a\u8ff0\u6982\u5ff5\uff0c\u6211\u4eec\u5c31\u80fd\u63ed\u5f00 Python <code>for<\/code> \u5faa\u73af\u7684\u795e\u79d8\u9762\u7eb1\u3002\u5f53\u4f60\u5199\u4e0b\u4ee5\u4e0b\u4ee3\u7801\u65f6\uff1a<\/p>\n\n\n\n<div class=\"chp-code-block chp-theme-github-dark chp-wrap-on\" data-chp-language=\"plaintext\" data-chp-line-start=\"1\" data-chp-highlight=\"\"><div class=\"chp-toolbar\"><div class=\"chp-toolbar-left\"><span class=\"chp-dots\"><span><\/span><span><\/span><span><\/span><\/span><span class=\"chp-language-label\">\u7eaf\u6587\u672c<\/span><\/div><div class=\"chp-toolbar-right\"><button type=\"button\" class=\"chp-copy-btn\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><svg class=\"chp-icon-copy\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z\"\/><\/svg><svg class=\"chp-icon-check\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\" style=\"display:none;\"><path fill=\"currentColor\" d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><span class=\"chp-copy-text\">\u590d\u5236<\/span><\/button><\/div><\/div><div class=\"chp-code-wrapper\"><div class=\"chp-line-numbers\" aria-hidden=\"true\"><span>1<\/span><span>2<\/span><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">for item in [1, 2, 3]:\n    print(item)<\/code><\/pre><\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Python \u89e3\u91ca\u5668\u5728\u5e95\u5c42\u5b9e\u9645\u6267\u884c\u7684\u662f\u4ee5\u4e0b\u7b49\u4ef7\u4ee3\u7801\uff1a<\/p>\n\n\n\n<div class=\"chp-code-block chp-theme-github-dark chp-wrap-on\" data-chp-language=\"plaintext\" data-chp-line-start=\"1\" data-chp-highlight=\"\"><div class=\"chp-toolbar\"><div class=\"chp-toolbar-left\"><span class=\"chp-dots\"><span><\/span><span><\/span><span><\/span><\/span><span class=\"chp-language-label\">\u7eaf\u6587\u672c<\/span><\/div><div class=\"chp-toolbar-right\"><button type=\"button\" class=\"chp-copy-btn\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><svg class=\"chp-icon-copy\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z\"\/><\/svg><svg class=\"chp-icon-check\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\" style=\"display:none;\"><path fill=\"currentColor\" d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><span class=\"chp-copy-text\">\u590d\u5236<\/span><\/button><\/div><\/div><div class=\"chp-code-wrapper\"><div class=\"chp-line-numbers\" aria-hidden=\"true\"><span>1<\/span><span>2<\/span><span>3<\/span><span>4<\/span><span>5<\/span><span>6<\/span><span>7<\/span><span>8<\/span><span>9<\/span><span>10<\/span><span>11<\/span><span>12<\/span><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\"># 1. \u83b7\u53d6\u53ef\u8fed\u4ee3\u5bf9\u8c61\u7684\u8fed\u4ee3\u5668\niterator = iter([1, 2, 3])  # \u8c03\u7528 [1, 2, 3].__iter__()\n\nwhile True:\n    try:\n        # 2. \u4e0d\u65ad\u8c03\u7528 next() \u83b7\u53d6\u4e0b\u4e00\u4e2a\u503c\n        item = next(iterator)  # \u8c03\u7528 iterator.__next__()\n        # 3. \u6267\u884c\u5faa\u73af\u4f53\n        print(item)\n    except StopIteration:\n        # 4. \u6355\u83b7 StopIteration \u5f02\u5e38\uff0c\u4f18\u96c5\u5730\u9000\u51fa\u5faa\u73af\n        break<\/code><\/pre><\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><em>\ud83d\udca1 \u6838\u5fc3\u542f\u793a<\/em>\uff1a<code>for<\/code> \u5faa\u73af\u672c\u8d28\u4e0a\u662f\u4e00\u4e2a <code>while True<\/code> \u52a0\u4e0a <code>try...except StopIteration<\/code> \u7684\u8bed\u6cd5\u7cd6\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e09\u3001 \u81ea\u5b9a\u4e49\u8fed\u4ee3\u5668 (Custom Iterator)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u867d\u7136 Python \u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u5185\u7f6e\u8fed\u4ee3\u5668\uff0c\u4f46\u4e86\u89e3\u5982\u4f55\u901a\u8fc7\u7c7b\u6765\u624b\u52a8\u5b9e\u73b0\u8fed\u4ee3\u5668\u534f\u8bae\uff0c\u6709\u52a9\u4e8e\u6df1\u523b\u7406\u89e3\u5176\u673a\u5236\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u793a\u4f8b\uff1a\u5b9e\u73b0\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684\u8ba1\u6570\u5668\u8fed\u4ee3\u5668<\/h4>\n\n\n\n<div class=\"chp-code-block chp-theme-github-dark chp-wrap-on\" data-chp-language=\"plaintext\" data-chp-line-start=\"1\" data-chp-highlight=\"\"><div class=\"chp-toolbar\"><div class=\"chp-toolbar-left\"><span class=\"chp-dots\"><span><\/span><span><\/span><span><\/span><\/span><span class=\"chp-language-label\">\u7eaf\u6587\u672c<\/span><\/div><div class=\"chp-toolbar-right\"><button type=\"button\" class=\"chp-copy-btn\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><svg class=\"chp-icon-copy\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z\"\/><\/svg><svg class=\"chp-icon-check\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\" style=\"display:none;\"><path fill=\"currentColor\" d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><span class=\"chp-copy-text\">\u590d\u5236<\/span><\/button><\/div><\/div><div class=\"chp-code-wrapper\"><div class=\"chp-line-numbers\" aria-hidden=\"true\"><span>1<\/span><span>2<\/span><span>3<\/span><span>4<\/span><span>5<\/span><span>6<\/span><span>7<\/span><span>8<\/span><span>9<\/span><span>10<\/span><span>11<\/span><span>12<\/span><span>13<\/span><span>14<\/span><span>15<\/span><span>16<\/span><span>17<\/span><span>18<\/span><span>19<\/span><span>20<\/span><span>21<\/span><span>22<\/span><span>23<\/span><span>24<\/span><span>25<\/span><span>26<\/span><span>27<\/span><span>28<\/span><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">class CounterIterator:\n    def __init__(self, start, end):\n        self.current = start\n        self.end = end\n\n    def __iter__(self):\n        # \u8fed\u4ee3\u5668\u5fc5\u987b\u8fd4\u56de\u81ea\u8eab\n        return self\n\n    def __next__(self):\n        if self.current &lt; self.end:\n            result = self.current\n            self.current += 1\n            return result\n        else:\n            # \u6570\u636e\u8017\u5c3d\u65f6\uff0c\u5fc5\u987b\u629b\u51fa StopIteration\n            raise StopIteration\n\n# \u4f7f\u7528\u81ea\u5b9a\u4e49\u8fed\u4ee3\u5668\ncounter = CounterIterator(1, 4)\nprint(next(counter))  # 1\nprint(next(counter))  # 2\nprint(next(counter))  # 3\n# print(next(counter))  # \u629b\u51fa StopIteration\n\n# \u4e5f\u53ef\u4ee5\u76f4\u63a5\u7528 for \u5faa\u73af\nfor num in CounterIterator(1, 4):\n    print(num)  # \u4f9d\u6b21\u8f93\u51fa 1, 2, 3<\/code><\/pre><\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><em>\u7f3a\u70b9<\/em>\uff1a\u4e3a\u4e86\u5b9e\u73b0\u4e00\u4e2a\u7b80\u5355\u7684\u5e8f\u5217\uff0c\u6211\u4eec\u9700\u8981\u7f16\u5199\u4e00\u4e2a\u5b8c\u6574\u7684\u7c7b\uff0c\u7ba1\u7406\u5185\u90e8\u72b6\u6001 (<code>self.current<\/code>)\uff0c\u4ee3\u7801\u663e\u5f97\u5197\u957f\u4e14\u7b28\u91cd\u3002\u8fd9\u6b63\u662f<strong>\u751f\u6210\u5668<\/strong>\u8bde\u751f\u7684\u539f\u56e0\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u56db\u3001 \u751f\u6210\u5668 (Generator)\uff1a\u8fed\u4ee3\u5668\u7684\u4f18\u96c5\u5347\u534e \ud83c\udf1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u751f\u6210\u5668\u662f Python \u63d0\u4f9b\u7684\u4e00\u79cd\u66f4\u7b80\u6d01\u3001\u66f4\u5f3a\u5927\u7684\u521b\u5efa\u8fed\u4ee3\u5668\u7684\u65b9\u5f0f\u3002\u5b83\u4e0d\u9700\u8981\u4f60\u624b\u52a8\u7f16\u5199\u7c7b\u548c\u7ef4\u62a4 <code>__iter__<\/code> \/ <code>__next__<\/code> \u65b9\u6cd5\uff0cPython \u89e3\u91ca\u5668\u4f1a\u81ea\u52a8\u4e3a\u4f60\u5904\u7406\u6240\u6709\u72b6\u6001\u4fdd\u5b58\u548c\u6062\u590d\u7684\u5de5\u4f5c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u751f\u6210\u5668\u6709\u4e24\u79cd\u521b\u5efa\u65b9\u5f0f\uff1a<strong>\u751f\u6210\u5668\u51fd\u6570<\/strong> \u548c <strong>\u751f\u6210\u5668\u8868\u8fbe\u5f0f<\/strong>\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">1. \u751f\u6210\u5668\u51fd\u6570 (Generator Function)<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u4efb\u4f55\u5305\u542b <code>yield<\/code> \u5173\u952e\u5b57\u7684\u51fd\u6570\uff0c\u90fd\u4f1a\u81ea\u52a8\u53d8\u6210\u751f\u6210\u5668\u51fd\u6570\u3002\u8c03\u7528\u5b83<strong>\u4e0d\u4f1a\u7acb\u5373\u6267\u884c\u51fd\u6570\u4f53<\/strong>\uff0c\u800c\u662f\u8fd4\u56de\u4e00\u4e2a<strong>\u751f\u6210\u5668\u5bf9\u8c61<\/strong>\uff08\u5b83\u672c\u8eab\u5c31\u662f\u4e00\u4e2a\u8fed\u4ee3\u5668\uff09\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><code>yield<\/code> \u7684\u5de5\u4f5c\u539f\u7406<\/strong>\uff1a<br>\u5f53\u4ee3\u7801\u6267\u884c\u5230 <code>yield<\/code> \u65f6\uff0c\u51fd\u6570\u4f1a<strong>\u6682\u505c (Pause)<\/strong>\uff0c\u5e76\u5c06 <code>yield<\/code> \u540e\u9762\u7684\u503c\u8fd4\u56de\u7ed9\u8c03\u7528\u8005\u3002\u51fd\u6570\u7684<strong>\u6240\u6709\u5c40\u90e8\u53d8\u91cf\u548c\u6267\u884c\u72b6\u6001\u90fd\u4f1a\u88ab\u4fdd\u5b58<\/strong>\u3002\u4e0b\u6b21\u8c03\u7528 <code>next()<\/code> \u65f6\uff0c\u51fd\u6570\u4f1a\u4ece\u4e0a\u6b21\u6682\u505c\u7684\u5730\u65b9<strong>\u6062\u590d (Resume)<\/strong> \u6267\u884c\uff0c\u76f4\u5230\u9047\u5230\u4e0b\u4e00\u4e2a <code>yield<\/code> \u6216\u51fd\u6570\u7ed3\u675f\u3002<\/p>\n\n\n\n<div class=\"chp-code-block chp-theme-github-dark chp-wrap-on\" data-chp-language=\"plaintext\" data-chp-line-start=\"1\" data-chp-highlight=\"\"><div class=\"chp-toolbar\"><div class=\"chp-toolbar-left\"><span class=\"chp-dots\"><span><\/span><span><\/span><span><\/span><\/span><span class=\"chp-language-label\">\u7eaf\u6587\u672c<\/span><\/div><div class=\"chp-toolbar-right\"><button type=\"button\" class=\"chp-copy-btn\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><svg class=\"chp-icon-copy\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z\"\/><\/svg><svg class=\"chp-icon-check\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\" style=\"display:none;\"><path fill=\"currentColor\" d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><span class=\"chp-copy-text\">\u590d\u5236<\/span><\/button><\/div><\/div><div class=\"chp-code-wrapper\"><div class=\"chp-line-numbers\" aria-hidden=\"true\"><span>1<\/span><span>2<\/span><span>3<\/span><span>4<\/span><span>5<\/span><span>6<\/span><span>7<\/span><span>8<\/span><span>9<\/span><span>10<\/span><span>11<\/span><span>12<\/span><span>13<\/span><span>14<\/span><span>15<\/span><span>16<\/span><span>17<\/span><span>18<\/span><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">def simple_generator():\n    print(&quot;\u7b2c\u4e00\u6b21\u8c03\u7528 next()\uff0c\u6267\u884c\u5230\u8fd9\u91cc&quot;)\n    yield 1\n    print(&quot;\u7b2c\u4e8c\u6b21\u8c03\u7528 next()\uff0c\u4ece\u8fd9\u91cc\u6062\u590d&quot;)\n    yield 2\n    print(&quot;\u7b2c\u4e09\u6b21\u8c03\u7528 next()\uff0c\u4ece\u8fd9\u91cc\u6062\u590d&quot;)\n    yield 3\n    print(&quot;\u51fd\u6570\u6267\u884c\u5b8c\u6bd5&quot;)\n\n# 1. \u8c03\u7528\u751f\u6210\u5668\u51fd\u6570\uff0c\u83b7\u53d6\u751f\u6210\u5668\u5bf9\u8c61 (\u6b64\u65f6\u51fd\u6570\u4f53\u672a\u6267\u884c)\ngen = simple_generator()\nprint(type(gen))  # &lt;class &#039;generator&#039;&gt;\n\n# 2. \u9a71\u52a8\u751f\u6210\u5668\nprint(next(gen))  # \u8f93\u51fa: &quot;\u7b2c\u4e00\u6b21\u8c03\u7528...&quot; \u7136\u540e\u8fd4\u56de 1\nprint(next(gen))  # \u8f93\u51fa: &quot;\u7b2c\u4e8c\u6b21\u8c03\u7528...&quot; \u7136\u540e\u8fd4\u56de 2\nprint(next(gen))  # \u8f93\u51fa: &quot;\u7b2c\u4e09\u6b21\u8c03\u7528...&quot; \u7136\u540e\u8fd4\u56de 3\n# print(next(gen))  # \u8f93\u51fa: &quot;\u51fd\u6570\u6267\u884c\u5b8c\u6bd5&quot;\uff0c\u7136\u540e\u629b\u51fa StopIteration<\/code><\/pre><\/div><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">2. \u7528\u751f\u6210\u5668\u91cd\u5199\u6590\u6ce2\u90a3\u5951\u6570\u5217<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u6bd4\u4e4b\u524d\u81ea\u5b9a\u4e49\u8fed\u4ee3\u5668\u7684\u5197\u957f\uff0c\u751f\u6210\u5668\u7684\u7b80\u6d01\u6027\u5c55\u9732\u65e0\u9057\uff1a<\/p>\n\n\n\n<div class=\"chp-code-block chp-theme-github-dark chp-wrap-on\" data-chp-language=\"plaintext\" data-chp-line-start=\"1\" data-chp-highlight=\"\"><div class=\"chp-toolbar\"><div class=\"chp-toolbar-left\"><span class=\"chp-dots\"><span><\/span><span><\/span><span><\/span><\/span><span class=\"chp-language-label\">\u7eaf\u6587\u672c<\/span><\/div><div class=\"chp-toolbar-right\"><button type=\"button\" class=\"chp-copy-btn\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><svg class=\"chp-icon-copy\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z\"\/><\/svg><svg class=\"chp-icon-check\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\" style=\"display:none;\"><path fill=\"currentColor\" d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><span class=\"chp-copy-text\">\u590d\u5236<\/span><\/button><\/div><\/div><div class=\"chp-code-wrapper\"><div class=\"chp-line-numbers\" aria-hidden=\"true\"><span>1<\/span><span>2<\/span><span>3<\/span><span>4<\/span><span>5<\/span><span>6<\/span><span>7<\/span><span>8<\/span><span>9<\/span><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">def fibonacci(n):\n    a, b = 0, 1\n    for _ in range(n):\n        yield a\n        a, b = b, a + b  # \u72b6\u6001\u81ea\u52a8\u4fdd\u5b58\uff0c\u4e0b\u6b21\u4ece\u8fd9\u91cc\u7ee7\u7eed\n\n# \u751f\u6210\u524d 10 \u4e2a\u6590\u6ce2\u90a3\u5951\u6570\nfor num in fibonacci(10):\n    print(num, end=&quot; &quot;)  # 0 1 1 2 3 5 8 13 21 34<\/code><\/pre><\/div><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">3. \u751f\u6210\u5668\u8868\u8fbe\u5f0f (Generator Expression)<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u5728\u201c\u63a8\u5bfc\u5f0f\u201d\u7ae0\u8282\u5df2\u7ecf\u7b80\u8981\u63d0\u53ca\u3002\u5b83\u662f\u5217\u8868\u63a8\u5bfc\u5f0f\u7684\u60f0\u6027\u7248\u672c\uff0c\u4f7f\u7528\u5706\u62ec\u53f7 <code>()<\/code>\u3002<\/p>\n\n\n\n<div class=\"chp-code-block chp-theme-github-dark chp-wrap-on\" data-chp-language=\"plaintext\" data-chp-line-start=\"1\" data-chp-highlight=\"\"><div class=\"chp-toolbar\"><div class=\"chp-toolbar-left\"><span class=\"chp-dots\"><span><\/span><span><\/span><span><\/span><\/span><span class=\"chp-language-label\">\u7eaf\u6587\u672c<\/span><\/div><div class=\"chp-toolbar-right\"><button type=\"button\" class=\"chp-copy-btn\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><svg class=\"chp-icon-copy\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z\"\/><\/svg><svg class=\"chp-icon-check\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\" style=\"display:none;\"><path fill=\"currentColor\" d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><span class=\"chp-copy-text\">\u590d\u5236<\/span><\/button><\/div><\/div><div class=\"chp-code-wrapper\"><div class=\"chp-line-numbers\" aria-hidden=\"true\"><span>1<\/span><span>2<\/span><span>3<\/span><span>4<\/span><span>5<\/span><span>6<\/span><span>7<\/span><span>8<\/span><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\"># \u5217\u8868\u63a8\u5bfc\u5f0f\uff1a\u7acb\u5373\u8ba1\u7b97\uff0c\u5360\u7528\u5927\u91cf\u5185\u5b58\nlist_comp = [x ** 2 for x in range(1000000)] \n\n# \u751f\u6210\u5668\u8868\u8fbe\u5f0f\uff1a\u60f0\u6027\u8ba1\u7b97\uff0c\u51e0\u4e4e\u4e0d\u5360\u5185\u5b58\ngen_exp = (x ** 2 for x in range(1000000))\n\nprint(next(gen_exp))  # 0\nprint(next(gen_exp))  # 1<\/code><\/pre><\/div><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e94\u3001 Python 3 \u751f\u6210\u5668\u7684\u9ad8\u7ea7\u7279\u6027<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">1. <code>yield from<\/code> (Python 3.3+)<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u9700\u8981\u5728\u4e00\u4e2a\u751f\u6210\u5668\u4e2d\u59d4\u6258\uff08delegate\uff09\u7ed9\u53e6\u4e00\u4e2a\u53ef\u8fed\u4ee3\u5bf9\u8c61\u6216\u5b50\u751f\u6210\u5668\u65f6\uff0c<code>yield from<\/code> \u662f\u6700\u4f73\u9009\u62e9\u3002\u5b83\u4f1a\u81ea\u52a8\u5904\u7406\u5b50\u751f\u6210\u5668\u7684 <code>StopIteration<\/code>\uff0c\u5e76\u53ef\u4ee5\u4f20\u9012\u8fd4\u56de\u503c\u3002<\/p>\n\n\n\n<div class=\"chp-code-block chp-theme-github-dark chp-wrap-on\" data-chp-language=\"plaintext\" data-chp-line-start=\"1\" data-chp-highlight=\"\"><div class=\"chp-toolbar\"><div class=\"chp-toolbar-left\"><span class=\"chp-dots\"><span><\/span><span><\/span><span><\/span><\/span><span class=\"chp-language-label\">\u7eaf\u6587\u672c<\/span><\/div><div class=\"chp-toolbar-right\"><button type=\"button\" class=\"chp-copy-btn\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><svg class=\"chp-icon-copy\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z\"\/><\/svg><svg class=\"chp-icon-check\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\" style=\"display:none;\"><path fill=\"currentColor\" d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><span class=\"chp-copy-text\">\u590d\u5236<\/span><\/button><\/div><\/div><div class=\"chp-code-wrapper\"><div class=\"chp-line-numbers\" aria-hidden=\"true\"><span>1<\/span><span>2<\/span><span>3<\/span><span>4<\/span><span>5<\/span><span>6<\/span><span>7<\/span><span>8<\/span><span>9<\/span><span>10<\/span><span>11<\/span><span>12<\/span><span>13<\/span><span>14<\/span><span>15<\/span><span>16<\/span><span>17<\/span><span>18<\/span><span>19<\/span><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">def sub_generator():\n    yield &quot;A&quot;\n    yield &quot;B&quot;\n    return &quot;Sub-generator finished&quot;  # Python 3.3+ \u5141\u8bb8\u751f\u6210\u5668\u8fd4\u56de\u503c\n\ndef main_generator():\n    yield 1\n    # \u59d4\u6258\u7ed9 sub_generator\uff0c\u5e76\u63a5\u6536\u5176\u8fd4\u56de\u503c\n    result = yield from sub_generator()\n    yield 2\n    print(f&quot;Received from sub: {result}&quot;)\n    yield 3\n\ngen = main_generator()\nprint(next(gen))  # 1\nprint(next(gen))  # A\nprint(next(gen))  # B\nprint(next(gen))  # 2 (\u540c\u65f6\u6253\u5370: Received from sub: Sub-generator finished)\nprint(next(gen))  # 3<\/code><\/pre><\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><em>\u5e94\u7528\u573a\u666f<\/em>\uff1a\u9012\u5f52\u904d\u5386\u76ee\u5f55\u6811\u3001\u5c55\u5e73\u5d4c\u5957\u5217\u8868\u3001\u6784\u5efa\u590d\u6742\u7684\u6570\u636e\u5904\u7406\u7ba1\u9053\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">2. \u751f\u6210\u5668\u7684\u53cc\u5411\u901a\u4fe1\uff1a<code>.send()<\/code>, <code>.throw()<\/code>, <code>.close()<\/code><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u751f\u6210\u5668\u4e0d\u4ec5\u4ec5\u662f\u201c\u4ea7\u51fa\u201d\u6570\u636e\uff0c\u5b83\u8fd8\u53ef\u4ee5\u201c\u63a5\u6536\u201d\u6570\u636e\u3002\u8fd9\u4f7f\u5f97\u751f\u6210\u5668\u6210\u4e3a\u4e86 Python <strong>\u534f\u7a0b (Coroutine)<\/strong> \u7684\u57fa\u7840\uff08\u5c3d\u7ba1\u73b0\u4ee3 Python \u66f4\u63a8\u8350\u4f7f\u7528 <code>async\/await<\/code>\uff09\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>gen.send(value)<\/code>: \u6062\u590d\u751f\u6210\u5668\uff0c\u5e76\u5c06 <code>value<\/code> \u4f5c\u4e3a\u5f53\u524d <code>yield<\/code> \u8868\u8fbe\u5f0f\u7684\u7ed3\u679c\u8fd4\u56de\u7ed9\u751f\u6210\u5668\u5185\u90e8\u3002<\/li>\n\n\n\n<li><code>gen.throw(Exception)<\/code>: \u5728\u751f\u6210\u5668\u6682\u505c\u7684\u4f4d\u7f6e\u629b\u51fa\u4e00\u4e2a\u5f02\u5e38\u3002<\/li>\n\n\n\n<li><code>gen.close()<\/code>: \u5728\u751f\u6210\u5668\u6682\u505c\u7684\u4f4d\u7f6e\u6ce8\u5165 <code>GeneratorExit<\/code> \u5f02\u5e38\uff0c\u7528\u4e8e\u6e05\u7406\u8d44\u6e90\u3002<\/li>\n<\/ul>\n\n\n\n<div class=\"chp-code-block chp-theme-github-dark chp-wrap-on\" data-chp-language=\"plaintext\" data-chp-line-start=\"1\" data-chp-highlight=\"\"><div class=\"chp-toolbar\"><div class=\"chp-toolbar-left\"><span class=\"chp-dots\"><span><\/span><span><\/span><span><\/span><\/span><span class=\"chp-language-label\">\u7eaf\u6587\u672c<\/span><\/div><div class=\"chp-toolbar-right\"><button type=\"button\" class=\"chp-copy-btn\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><svg class=\"chp-icon-copy\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z\"\/><\/svg><svg class=\"chp-icon-check\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\" style=\"display:none;\"><path fill=\"currentColor\" d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><span class=\"chp-copy-text\">\u590d\u5236<\/span><\/button><\/div><\/div><div class=\"chp-code-wrapper\"><div class=\"chp-line-numbers\" aria-hidden=\"true\"><span>1<\/span><span>2<\/span><span>3<\/span><span>4<\/span><span>5<\/span><span>6<\/span><span>7<\/span><span>8<\/span><span>9<\/span><span>10<\/span><span>11<\/span><span>12<\/span><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">def echo_generator():\n    print(&quot;Generator started&quot;)\n    while True:\n        # yield \u8868\u8fbe\u5f0f\u7684\u503c\u5c31\u662f send() \u4f20\u5165\u7684\u503c\n        received = yield\n        print(f&quot;Echo: {received}&quot;)\n\ngen = echo_generator()\nnext(gen)          # \u542f\u52a8\u751f\u6210\u5668\uff0c\u6267\u884c\u5230\u7b2c\u4e00\u4e2a yield \u6682\u505c\u3002\u8f93\u51fa: Generator started\ngen.send(&quot;Hello&quot;)  # \u6062\u590d\u6267\u884c\uff0c&quot;Hello&quot; \u8d4b\u503c\u7ed9 received\u3002\u8f93\u51fa: Echo: Hello\ngen.send(&quot;World&quot;)  # \u8f93\u51fa: Echo: World\ngen.close()        # \u4f18\u96c5\u5173\u95ed\u751f\u6210\u5668<\/code><\/pre><\/div><\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u516d\u3001 \u5e95\u5c42\u539f\u7406\u4e0e\u6027\u80fd\u5206\u6790<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">1. \u5185\u5b58\u5360\u7528\u7684\u964d\u7ef4\u6253\u51fb<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u751f\u6210\u5668\u7684\u6838\u5fc3\u4ef7\u503c\u5728\u4e8e<strong>\u7a7a\u95f4\u590d\u6742\u5ea6\u4ece $O(N)$ \u964d\u4e3a $O(1)$<\/strong>\u3002\u5b83\u4e0d\u5b58\u50a8\u6570\u636e\uff0c\u53ea\u5b58\u50a8<strong>\u4ea7\u751f\u6570\u636e\u7684\u7b97\u6cd5\u548c\u5f53\u524d\u72b6\u6001<\/strong>\u3002<\/p>\n\n\n\n<div class=\"chp-code-block chp-theme-github-dark chp-wrap-on\" data-chp-language=\"plaintext\" data-chp-line-start=\"1\" data-chp-highlight=\"\"><div class=\"chp-toolbar\"><div class=\"chp-toolbar-left\"><span class=\"chp-dots\"><span><\/span><span><\/span><span><\/span><\/span><span class=\"chp-language-label\">\u7eaf\u6587\u672c<\/span><\/div><div class=\"chp-toolbar-right\"><button type=\"button\" class=\"chp-copy-btn\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><svg class=\"chp-icon-copy\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z\"\/><\/svg><svg class=\"chp-icon-check\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\" style=\"display:none;\"><path fill=\"currentColor\" d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><span class=\"chp-copy-text\">\u590d\u5236<\/span><\/button><\/div><\/div><div class=\"chp-code-wrapper\"><div class=\"chp-line-numbers\" aria-hidden=\"true\"><span>1<\/span><span>2<\/span><span>3<\/span><span>4<\/span><span>5<\/span><span>6<\/span><span>7<\/span><span>8<\/span><span>9<\/span><span>10<\/span><span>11<\/span><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">import sys\n\n# \u573a\u666f\uff1a\u5904\u7406 1 \u4ebf\u4e2a\u6570\u5b57\u7684\u5e73\u65b9\nN = 100_000_000\n\n# \u5217\u8868\uff1a\u5c1d\u8bd5\u5206\u914d\u7ea6 800MB+ \u5185\u5b58\uff0c\u53ef\u80fd\u5bfc\u81f4 MemoryError\n# large_list = [x ** 2 for x in range(N)] \n\n# \u751f\u6210\u5668\uff1a\u65e0\u8bba N \u591a\u5927\uff0c\u5185\u5b58\u5360\u7528\u6052\u5b9a\u5728\u7ea6 100 \u5b57\u8282\u5de6\u53f3\nlarge_gen = (x ** 2 for x in range(N))\nprint(f&quot;Generator size: {sys.getsizeof(large_gen)} bytes&quot;) # ~104 bytes<\/code><\/pre><\/div><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">2. \u65f6\u95f4\u590d\u6742\u5ea6\u4e0e\u5ef6\u8fdf\u8ba1\u7b97 (Lazy Evaluation)<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u751f\u6210\u5668\u91c7\u7528<strong>\u5ef6\u8fdf\u8ba1\u7b97<\/strong>\u3002\u5982\u679c\u4f60\u53ea\u9700\u8981\u524d 5 \u4e2a\u7ed3\u679c\uff0c\u5b83\u7edd\u4e0d\u4f1a\u8ba1\u7b97\u7b2c 6 \u4e2a\u53ca\u4ee5\u540e\u7684\u7ed3\u679c\u3002\u8fd9\u5728\u5904\u7406\u65e0\u9650\u5e8f\u5217\uff08\u5982\u5b9e\u65f6\u65e5\u5fd7\u6d41\u3001\u4f20\u611f\u5668\u6570\u636e\uff09\u6216\u65e9\u671f\u9000\u51fa (<code>break<\/code>) \u7684\u641c\u7d22\u573a\u666f\u4e2d\uff0c\u80fd\u8282\u7701\u5de8\u5927\u7684 CPU \u65f6\u95f4\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">3. \u4e3a\u4ec0\u4e48\u751f\u6210\u5668\u53ea\u80fd\u904d\u5386\u4e00\u6b21\uff1f<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fed\u4ee3\u5668\u7684\u8bbe\u8ba1\u54f2\u5b66\u662f\u201c\u5355\u5411\u5411\u524d\u7684\u6570\u636e\u6d41\u201d\u3002\u4e00\u65e6 <code>__next__<\/code> \u629b\u51fa\u4e86 <code>StopIteration<\/code>\uff0c\u8be5\u8fed\u4ee3\u5668\u5c31\u5ba3\u544a<strong>\u8017\u5c3d (Exhausted)<\/strong>\u3002\u518d\u6b21\u5bf9\u5176\u8c03\u7528 <code>next()<\/code> \u6216\u653e\u5165 <code>for<\/code> \u5faa\u73af\uff0c\u5c06\u7acb\u5373\u629b\u51fa <code>StopIteration<\/code> \u6216\u4ec0\u4e48\u90fd\u4e0d\u505a\u3002<br><em>(\u5982\u679c\u9700\u8981\u591a\u6b21\u904d\u5386\uff0c\u5fc5\u987b\u91cd\u65b0\u8c03\u7528\u751f\u6210\u5668\u51fd\u6570\u6216\u91cd\u65b0\u521b\u5efa\u751f\u6210\u5668\u8868\u8fbe\u5f0f\u3002)<\/em><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e03\u3001 \u6838\u5fc3\u907f\u5751\u6307\u5357\u4e0e\u6700\u4f73\u5b9e\u8df5<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">1. \u274c \u9677\u9631\u4e00\uff1a\u8bd5\u56fe\u5bf9\u8017\u5c3d\u7684\u751f\u6210\u5668\u8fdb\u884c\u4e8c\u6b21\u904d\u5386<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u662f\u65b0\u624b\u6700\u5e38\u9047\u5230\u7684 Bug\u3002<\/p>\n\n\n\n<div class=\"chp-code-block chp-theme-github-dark chp-wrap-on\" data-chp-language=\"plaintext\" data-chp-line-start=\"1\" data-chp-highlight=\"\"><div class=\"chp-toolbar\"><div class=\"chp-toolbar-left\"><span class=\"chp-dots\"><span><\/span><span><\/span><span><\/span><\/span><span class=\"chp-language-label\">\u7eaf\u6587\u672c<\/span><\/div><div class=\"chp-toolbar-right\"><button type=\"button\" class=\"chp-copy-btn\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><svg class=\"chp-icon-copy\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z\"\/><\/svg><svg class=\"chp-icon-check\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\" style=\"display:none;\"><path fill=\"currentColor\" d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><span class=\"chp-copy-text\">\u590d\u5236<\/span><\/button><\/div><\/div><div class=\"chp-code-wrapper\"><div class=\"chp-line-numbers\" aria-hidden=\"true\"><span>1<\/span><span>2<\/span><span>3<\/span><span>4<\/span><span>5<\/span><span>6<\/span><span>7<\/span><span>8<\/span><span>9<\/span><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">gen = (x for x in range(3))\n\n# \u7b2c\u4e00\u6b21\u904d\u5386\uff1a\u6b63\u5e38\nfor item in gen:\n    print(item)  # 0, 1, 2\n\n# \u7b2c\u4e8c\u6b21\u904d\u5386\uff1a\u9759\u9ed8\u5931\u8d25\uff0c\u4ec0\u4e48\u90fd\u4e0d\u8f93\u51fa\uff01\nfor item in gen:\n    print(item)  <\/code><\/pre><\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u2705 \u89e3\u51b3\u65b9\u6848<\/strong>\uff1a\u5982\u679c\u9700\u8981\u591a\u6b21\u4f7f\u7528\uff0c\u8981\u4e48\u5c06\u5176\u8f6c\u6362\u4e3a\u5217\u8868 <code>list(gen)<\/code>\uff08\u727a\u7272\u5185\u5b58\uff09\uff0c\u8981\u4e48\u91cd\u65b0\u5b9e\u4f8b\u5316\u751f\u6210\u5668\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">2. \u274c \u9677\u9631\u4e8c\uff1a\u5728\u751f\u6210\u5668\u4e2d\u8bef\u7528 <code>return<\/code><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728 Python 3.3+ \u4e2d\uff0c\u751f\u6210\u5668\u5141\u8bb8\u4f7f\u7528 <code>return value<\/code>\u3002\u4f46\u8fd9<strong>\u4e0d\u4f1a<\/strong>\u50cf\u666e\u901a\u51fd\u6570\u90a3\u6837\u8fd4\u56de\u503c\u7ed9\u8c03\u7528\u8005\uff0c\u800c\u662f\u4f1a\u7acb\u5373\u89e6\u53d1 <code>StopIteration(value)<\/code> \u5f02\u5e38\uff0c\u63d0\u524d\u7ec8\u6b62\u751f\u6210\u5668\u3002<\/p>\n\n\n\n<div class=\"chp-code-block chp-theme-github-dark chp-wrap-on\" data-chp-language=\"plaintext\" data-chp-line-start=\"1\" data-chp-highlight=\"\"><div class=\"chp-toolbar\"><div class=\"chp-toolbar-left\"><span class=\"chp-dots\"><span><\/span><span><\/span><span><\/span><\/span><span class=\"chp-language-label\">\u7eaf\u6587\u672c<\/span><\/div><div class=\"chp-toolbar-right\"><button type=\"button\" class=\"chp-copy-btn\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><svg class=\"chp-icon-copy\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z\"\/><\/svg><svg class=\"chp-icon-check\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\" style=\"display:none;\"><path fill=\"currentColor\" d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><span class=\"chp-copy-text\">\u590d\u5236<\/span><\/button><\/div><\/div><div class=\"chp-code-wrapper\"><div class=\"chp-line-numbers\" aria-hidden=\"true\"><span>1<\/span><span>2<\/span><span>3<\/span><span>4<\/span><span>5<\/span><span>6<\/span><span>7<\/span><span>8<\/span><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">def bad_gen():\n    yield 1\n    return &quot;Done&quot;  # \u8fd9\u4f1a\u89e6\u53d1 StopIteration(&quot;Done&quot;)\uff0c\u800c\u4e0d\u662f\u8fd4\u56de\u5b57\u7b26\u4e32\n    yield 2        # \u8fd9\u884c\u6c38\u8fdc\u4e0d\u4f1a\u6267\u884c\n\ng = bad_gen()\nprint(next(g))     # 1\n# print(next(g))   # \u629b\u51fa StopIteration: Done<\/code><\/pre><\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><em>\u6700\u4f73\u5b9e\u8df5<\/em>\uff1a\u5728\u666e\u901a\u751f\u6210\u5668\u4e2d\uff0c\u5c3d\u91cf\u907f\u514d\u4f7f\u7528 <code>return<\/code>\uff0c\u9664\u975e\u4f60\u660e\u786e\u77e5\u9053\u81ea\u5df1\u5728\u505a\u751f\u6210\u5668\u59d4\u6258 (<code>yield from<\/code>)\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">3. \u274c \u9677\u9631\u4e09\uff1a\u751f\u6210\u5668\u8868\u8fbe\u5f0f\u4e2d\u7684\u665a\u671f\u7ed1\u5b9a (Late Binding)<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e0e\u95ed\u5305\u4e2d\u7684\u665a\u671f\u7ed1\u5b9a\u95ee\u9898\u76f8\u540c\u3002\u5982\u679c\u5728\u751f\u6210\u5668\u8868\u8fbe\u5f0f\u4e2d\u5f15\u7528\u4e86\u5916\u90e8\u5faa\u73af\u53d8\u91cf\uff0c\u53ef\u80fd\u4f1a\u5f97\u5230\u610f\u60f3\u4e0d\u5230\u7684\u7ed3\u679c\u3002<\/p>\n\n\n\n<div class=\"chp-code-block chp-theme-github-dark chp-wrap-on\" data-chp-language=\"plaintext\" data-chp-line-start=\"1\" data-chp-highlight=\"\"><div class=\"chp-toolbar\"><div class=\"chp-toolbar-left\"><span class=\"chp-dots\"><span><\/span><span><\/span><span><\/span><\/span><span class=\"chp-language-label\">\u7eaf\u6587\u672c<\/span><\/div><div class=\"chp-toolbar-right\"><button type=\"button\" class=\"chp-copy-btn\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><svg class=\"chp-icon-copy\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z\"\/><\/svg><svg class=\"chp-icon-check\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\" style=\"display:none;\"><path fill=\"currentColor\" d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><span class=\"chp-copy-text\">\u590d\u5236<\/span><\/button><\/div><\/div><div class=\"chp-code-wrapper\"><div class=\"chp-line-numbers\" aria-hidden=\"true\"><span>1<\/span><span>2<\/span><span>3<\/span><span>4<\/span><span>5<\/span><span>6<\/span><span>7<\/span><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\"># \u274c \u9519\u8bef\uff1a\u6240\u6709\u751f\u6210\u5668\u90fd\u5f15\u7528\u4e86\u540c\u4e00\u4e2a\u53d8\u91cf i\uff0c\u6700\u7ec8 i \u7684\u503c\u662f 2\ngenerators = [(lambda: i) for i in range(3)]\nprint([g() for g in generators])  # [2, 2, 2]\n\n# \u2705 \u6b63\u786e\uff1a\u4f7f\u7528\u9ed8\u8ba4\u53c2\u6570\u5f3a\u5236\u65e9\u671f\u7ed1\u5b9a\uff0c\u6216\u5728\u751f\u6210\u5668\u5185\u90e8\u7acb\u5373\u6c42\u503c\ngenerators = [(lambda x=i: x) for i in range(3)]\nprint([g() for g in generators])  # [0, 1, 2]<\/code><\/pre><\/div><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">4. \ud83d\udca1 \u6700\u4f73\u5b9e\u8df5\uff1a\u4f55\u65f6\u5fc5\u987b\u4f7f\u7528\u751f\u6210\u5668\uff1f<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u8bfb\u53d6\u8d85\u5927\u6587\u4ef6<\/strong>\uff1a\u9010\u884c\u8bfb\u53d6\uff0c\u800c\u4e0d\u662f\u4e00\u6b21\u6027 <code>readlines()<\/code> \u52a0\u8f7d\u5230\u5185\u5b58\u3002<\/li>\n<\/ol>\n\n\n\n<div class=\"chp-code-block chp-theme-github-dark chp-wrap-on\" data-chp-language=\"plaintext\" data-chp-line-start=\"1\" data-chp-highlight=\"\"><div class=\"chp-toolbar\"><div class=\"chp-toolbar-left\"><span class=\"chp-dots\"><span><\/span><span><\/span><span><\/span><\/span><span class=\"chp-language-label\">\u7eaf\u6587\u672c<\/span><\/div><div class=\"chp-toolbar-right\"><button type=\"button\" class=\"chp-copy-btn\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><svg class=\"chp-icon-copy\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z\"\/><\/svg><svg class=\"chp-icon-check\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\" style=\"display:none;\"><path fill=\"currentColor\" d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><span class=\"chp-copy-text\">\u590d\u5236<\/span><\/button><\/div><\/div><div class=\"chp-code-wrapper\"><div class=\"chp-line-numbers\" aria-hidden=\"true\"><span>1<\/span><span>2<\/span><span>3<\/span><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">   with open(&quot;huge_log.txt&quot;, &quot;r&quot;) as f:\n       for line in f:  # f \u672c\u8eab\u5c31\u662f\u4e00\u4e2a\u8fed\u4ee3\u5668\uff0c\u6bcf\u6b21\u53ea\u52a0\u8f7d\u4e00\u884c\u5230\u5185\u5b58\n           process(line)<\/code><\/pre><\/div><\/div>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>\u6784\u5efa\u6570\u636e\u5904\u7406\u7ba1\u9053 (Pipeline)<\/strong>\uff1a\u5c06\u591a\u4e2a\u751f\u6210\u5668\u4e32\u8054\uff0c\u6570\u636e\u50cf\u6d41\u6c34\u7ebf\u4e00\u6837\u6d41\u8fc7\uff0c\u5185\u5b58\u5360\u7528\u59cb\u7ec8\u6781\u4f4e\u3002<\/li>\n<\/ol>\n\n\n\n<div class=\"chp-code-block chp-theme-github-dark chp-wrap-on\" data-chp-language=\"plaintext\" data-chp-line-start=\"1\" data-chp-highlight=\"\"><div class=\"chp-toolbar\"><div class=\"chp-toolbar-left\"><span class=\"chp-dots\"><span><\/span><span><\/span><span><\/span><\/span><span class=\"chp-language-label\">\u7eaf\u6587\u672c<\/span><\/div><div class=\"chp-toolbar-right\"><button type=\"button\" class=\"chp-copy-btn\" aria-label=\"\u590d\u5236\u4ee3\u7801\"><svg class=\"chp-icon-copy\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M16 1H4c-1.1 0-2 .9-2 2v14h2V3h12V1zm3 4H8c-1.1 0-2 .9-2 2v14c0 1.1.9 2 2 2h11c1.1 0 2-.9 2-2V7c0-1.1-.9-2-2-2zm0 16H8V7h11v14z\"\/><\/svg><svg class=\"chp-icon-check\" viewBox=\"0 0 24 24\" width=\"14\" height=\"14\" aria-hidden=\"true\" style=\"display:none;\"><path fill=\"currentColor\" d=\"M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z\"\/><\/svg><span class=\"chp-copy-text\">\u590d\u5236<\/span><\/button><\/div><\/div><div class=\"chp-code-wrapper\"><div class=\"chp-line-numbers\" aria-hidden=\"true\"><span>1<\/span><span>2<\/span><span>3<\/span><span>4<\/span><span>5<\/span><span>6<\/span><span>7<\/span><span>8<\/span><span>9<\/span><span>10<\/span><span>11<\/span><span>12<\/span><span>13<\/span><span>14<\/span><span>15<\/span><span>16<\/span><span>17<\/span><span>18<\/span><span>19<\/span><span>20<\/span><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">   def read_data(filename):\n       with open(filename) as f:\n           for line in f:\n               yield line.strip()\n\n   def filter_errors(lines):\n       for line in lines:\n           if &quot;ERROR&quot; not in line:\n               yield line\n\n   def parse_to_dict(lines):\n       for line in lines:\n           yield {&quot;raw&quot;: line}\n\n   # \u7ba1\u9053\u7ec4\u88c5\uff1a\u6b64\u65f6\u6ca1\u6709\u4efb\u4f55\u6570\u636e\u88ab\u5b9e\u9645\u8bfb\u53d6\u6216\u5904\u7406\n   pipeline = parse_to_dict(filter_errors(read_data(&quot;app.log&quot;)))\n\n   # \u9a71\u52a8\u7ba1\u9053\uff1a\u6570\u636e\u5f00\u59cb\u6d41\u52a8\uff0c\u5185\u5b58\u5360\u7528\u6781\u5c0f\n   for record in pipeline:\n       save_to_db(record)<\/code><\/pre><\/div><\/div>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>\u8868\u793a\u65e0\u9650\u5e8f\u5217<\/strong>\uff1a\u5982\u6301\u7eed\u751f\u6210\u7684\u65f6\u95f4\u6233\u3001\u968f\u673a\u6570\u6d41\u7b49\u3002<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u516b\u3001 \u603b\u7ed3<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fed\u4ee3\u5668\u4e0e\u751f\u6210\u5668\u662f Python \u8bed\u8a00\u8bbe\u8ba1\u4e2d\u201c\u4f18\u96c5\u201d\u4e0e\u201c\u5b9e\u7528\u201d\u5b8c\u7f8e\u7ed3\u5408\u7684\u5178\u8303\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u534f\u8bae\u5c42\u9762<\/strong>\uff1a<code>__iter__<\/code> \u548c <code>__next__<\/code> \u6784\u6210\u4e86 Python \u8fed\u4ee3\u534f\u8bae\u7684\u57fa\u77f3\uff0c\u7edf\u4e00\u4e86\u6240\u6709\u96c6\u5408\u7c7b\u578b\u7684\u904d\u5386\u65b9\u5f0f\u3002<\/li>\n\n\n\n<li><strong>\u8bed\u6cd5\u5c42\u9762<\/strong>\uff1a<code>yield<\/code> \u5173\u952e\u5b57\u5c06\u590d\u6742\u7684\u7c7b\u72b6\u6001\u7ba1\u7406\u7b80\u5316\u4e3a\u76f4\u89c2\u7684\u51fd\u6570\u6682\u505c\u4e0e\u6062\u590d\uff0c\u6781\u5927\u5730\u63d0\u5347\u4e86\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u3002<\/li>\n\n\n\n<li><strong>\u6027\u80fd\u5c42\u9762<\/strong>\uff1a\u60f0\u6027\u6c42\u503c (Lazy Evaluation) \u4f7f\u5f97 Python \u80fd\u591f\u4ee5 $O(1)$ \u7684\u7a7a\u95f4\u590d\u6742\u5ea6\u5904\u7406 $O(N)$ \u751a\u81f3\u65e0\u9650\u7684\u6570\u636e\u6d41\uff0c\u8fd9\u662f Python \u80fd\u591f\u80dc\u4efb\u6570\u636e\u79d1\u5b66\u548c\u540e\u7aef\u9ad8\u5e76\u53d1\u4efb\u52a1\u7684\u5173\u952e\u80fd\u529b\u4e4b\u4e00\u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u4f60\u5f00\u59cb\u4e60\u60ef\u7528\u751f\u6210\u5668\u8868\u8fbe\u5f0f\u4ee3\u66ff\u5217\u8868\u63a8\u5bfc\u5f0f\u6765\u5904\u7406\u5927\u6570\u636e\uff0c\u7528 <code>yield<\/code> \u6765\u6784\u5efa\u6570\u636e\u5904\u7406\u7ba1\u9053\u65f6\uff0c\u4f60\u5c31\u771f\u6b63\u638c\u63e1\u4e86 Python \u5185\u5b58\u7ba1\u7406\u4e0e\u63a7\u5236\u6d41\u7684\u9ad8\u7ea7\u827a\u672f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u4f60\u5bf9\u751f\u6210\u5668\u5982\u4f55\u6f14\u53d8\u4e3a\u73b0\u4ee3 Python \u7684 <code>async\/await<\/code> \u5f02\u6b65\u534f\u7a0b\uff0c\u6216\u8005 <code>itertools<\/code> \u6a21\u5757\u4e2d\u66f4\u590d\u6742\u7684\u8fed\u4ee3\u5668\u7ec4\u5408\u5de5\u5177\u6709\u5174\u8da3\uff0c\u6211\u4eec\u53ef\u4ee5\u7ee7\u7eed\u6df1\u5165\u63a2\u8ba8\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Python 3 \u4e2d\uff0c\u8fed\u4ee3\u5668 (Iterato&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-68","post","type-post","status-publish","format-standard","hentry","category-python-3-"],"_links":{"self":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts\/68","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/comments?post=68"}],"version-history":[{"count":1,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts\/68\/revisions"}],"predecessor-version":[{"id":69,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts\/68\/revisions\/69"}],"wp:attachment":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/media?parent=68"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/categories?post=68"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/tags?post=68"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}