{"id":89,"date":"2026-06-13T19:03:24","date_gmt":"2026-06-13T11:03:24","guid":{"rendered":"https:\/\/www.52runoob.com\/?p=89"},"modified":"2026-06-13T19:03:24","modified_gmt":"2026-06-13T11:03:24","slug":"python3-%e5%be%aa%e7%8e%af%e8%af%ad%e5%8f%a5-2","status":"publish","type":"post","link":"https:\/\/www.52runoob.com\/index.php\/2026\/06\/13\/python3-%e5%be%aa%e7%8e%af%e8%af%ad%e5%8f%a5-2\/","title":{"rendered":"Python3 \u5faa\u73af\u8bed\u53e5"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u5728 Python 3 \u4e2d\uff0c\u5faa\u73af\u8bed\u53e5\u7528\u4e8e\u91cd\u590d\u6267\u884c\u4e00\u6bb5\u4ee3\u7801\u3002\u4e0e C++ \u6216 Java \u4e0d\u540c\uff0cPython <strong>\u53ea\u6709\u4e24\u79cd\u5faa\u73af<\/strong>\uff1a<code>for<\/code> \u5faa\u73af\u548c <code>while<\/code> \u5faa\u73af\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5176\u4e2d\uff0c<strong><code>for<\/code> \u5faa\u73af\u662f\u7edd\u5bf9\u7684\u4e3b\u529b<\/strong>\uff0c\u56e0\u4e3a\u5b83\u4e13\u95e8\u7528\u4e8e\u904d\u5386\u4efb\u4f55\u53ef\u8fed\u4ee3\u5bf9\u8c61\uff08\u5982\u5217\u8868\u3001\u5b57\u7b26\u4e32\u3001\u5b57\u5178\u7b49\uff09\uff0c\u8bed\u6cd5\u6781\u5176\u4f18\u96c5\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u6211\u5c06\u4ece <strong><code>for<\/code> \u5faa\u73af\u7684\u6838\u5fc3\u7528\u6cd5<\/strong>\u3001<strong>\u63a7\u5236\u6d41\u5173\u952e\u5b57<\/strong>\u5230<strong>\u9ad8\u7ea7\u6280\u5de7<\/strong>\uff0c\u4e3a\u4f60\u7cfb\u7edf\u68b3\u7406 Python 3 \u7684\u5faa\u73af\u8bed\u53e5\u3002<\/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 <code>for<\/code> \u5faa\u73af\uff1a\u904d\u5386\u7684\u827a\u672f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><code>for<\/code> \u5faa\u73af\u7684\u672c\u8d28\u662f\u201c\u8fed\u4ee3\u5668\u534f\u8bae\u201d\uff1a\u5b83\u4f1a\u81ea\u52a8\u4ece\u5bf9\u8c61\u4e2d\u9010\u4e2a\u53d6\u51fa\u5143\u7d20\uff0c\u76f4\u5230\u53d6\u5b8c\u4e3a\u6b62\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">1. \u57fa\u7840\u904d\u5386 (\u5217\u8868\u3001\u5b57\u7b26\u4e32\u3001\u5143\u7ec4)<\/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><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\"># \u904d\u5386\u5217\u8868\nfruits = [&quot;apple&quot;, &quot;banana&quot;, &quot;cherry&quot;]\nfor fruit in fruits:\n    print(fruit)\n\n# \u904d\u5386\u5b57\u7b26\u4e32\nfor char in &quot;Python&quot;:\n    print(char, end=&quot; &quot;)  # \u8f93\u51fa: P y t h o n <\/code><\/pre><\/div><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">2. \u914d\u5408 <code>range()<\/code> \u751f\u6210\u6570\u5b57\u5e8f\u5217<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u4f60\u9700\u8981\u5faa\u73af\u7279\u5b9a\u6b21\u6570\uff0c\u6216\u9700\u8981\u7d22\u5f15\u65f6\uff0c<code>range()<\/code> \u662f\u6700\u4f73\u642d\u6863\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\"># range(stop): 0 \u5230 stop-1\nfor i in range(3):\n    print(i)  # \u8f93\u51fa: 0, 1, 2\n\n# range(start, stop, step): \u6307\u5b9a\u8d77\u70b9\u3001\u7ec8\u70b9\u548c\u6b65\u957f\nfor i in range(2, 10, 2):\n    print(i, end=&quot; &quot;)  # \u8f93\u51fa: 2 4 6 8\n\n# \u5012\u5e8f\u904d\u5386\nfor i in range(5, 0, -1):\n    print(i, end=&quot; &quot;)  # \u8f93\u51fa: 5 4 3 2 1<\/code><\/pre><\/div><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">3. \u904d\u5386\u5b57\u5178 (Dictionary)<\/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><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">user = {&quot;name&quot;: &quot;Alice&quot;, &quot;age&quot;: 25, &quot;city&quot;: &quot;Beijing&quot;}\n\n# \u9ed8\u8ba4\u904d\u5386\u952e (Keys)\nfor key in user:\n    print(key)\n\n# \u904d\u5386\u952e\u503c\u5bf9 (\u6700\u5e38\u7528)\nfor key, value in user.items():\n    print(f&quot;{key}: {value}&quot;)\n\n# \u4ec5\u904d\u5386\u503c (Values)\nfor value in user.values():\n    print(value)<\/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\u9ec4\u91d1\u642d\u6863\uff1a<code>enumerate<\/code> \u4e0e <code>zip<\/code><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u662f Python \u5faa\u73af\u4e2d\u6700\u80fd\u4f53\u73b0\u201c\u4f18\u96c5\u201d\u7684\u4e24\u4e2a\u5185\u7f6e\u51fd\u6570\uff0c\u5f3a\u70c8\u5efa\u8bae\u638c\u63e1\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">1. <code>enumerate()<\/code>\uff1a\u540c\u65f6\u83b7\u53d6\u7d22\u5f15\u548c\u503c<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u65b0\u624b\u5e38\u72af\u7684\u9519\u8bef\u662f <code>for i in range(len(my_list)):<\/code>\uff0c\u5728 Python \u4e2d\u8fd9\u88ab\u89c6\u4e3a\u4e0d\u4f18\u96c5\u7684\u505a\u6cd5\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\">fruits = [&quot;apple&quot;, &quot;banana&quot;, &quot;cherry&quot;]\n\n# \u2705 \u63a8\u8350\u505a\u6cd5\uff1a\u540c\u65f6\u62ff\u5230\u7d22\u5f15 (index) \u548c\u503c (fruit)\nfor index, fruit in enumerate(fruits):\n    print(f&quot;\u7d22\u5f15 {index} \u7684\u6c34\u679c\u662f {fruit}&quot;)\n\n# \u53ef\u4ee5\u6307\u5b9a\u8d77\u59cb\u7d22\u5f15\nfor index, fruit in enumerate(fruits, start=1):\n    print(f&quot;\u7b2c {index} \u4e2a: {fruit}&quot;)<\/code><\/pre><\/div><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">2. <code>zip()<\/code>\uff1a\u5e76\u884c\u904d\u5386\u591a\u4e2a\u5e8f\u5217<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u4f60\u9700\u8981\u540c\u65f6\u904d\u5386\u4e24\u4e2a\u6216\u591a\u4e2a\u957f\u5ea6\u76f8\u540c\u7684\u5217\u8868\u65f6\uff0c<code>zip<\/code> \u4f1a\u5c06\u5b83\u4eec\u201c\u6253\u5305\u201d\u6210\u5143\u7ec4\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><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">names = [&quot;Alice&quot;, &quot;Bob&quot;, &quot;Charlie&quot;]\nscores = [95, 88, 92]\n\nfor name, score in zip(names, scores):\n    print(f&quot;{name} \u7684\u5206\u6570\u662f {score}&quot;)<\/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\">\u4e09\u3001 \u5faa\u73af\u63a7\u5236\u6d41\uff1a<code>break<\/code>\u3001<code>continue<\/code> \u4e0e <code>pass<\/code><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e09\u4e2a\u5173\u952e\u5b57\u7528\u4e8e\u5728\u5faa\u73af\u5185\u90e8\u7cbe\u7ec6\u63a7\u5236\u6267\u884c\u6d41\u7a0b\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">\u5173\u952e\u5b57<\/th><th class=\"has-text-align-left\" data-align=\"left\">\u4f5c\u7528<\/th><th class=\"has-text-align-left\" data-align=\"left\">\u7c7b\u6bd4<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\"><strong><code>break<\/code><\/strong><\/td><td class=\"has-text-align-left\" data-align=\"left\"><strong>\u7acb\u5373\u7ec8\u6b62<\/strong>\u6574\u4e2a\u5faa\u73af\uff0c\u8df3\u51fa\u5faa\u73af\u4f53\u3002<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u9047\u5230\u7ea2\u706f\uff0c\u76f4\u63a5\u4e0b\u8f66\u4e0d\u8d70\u4e86\u3002<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><strong><code>continue<\/code><\/strong><\/td><td class=\"has-text-align-left\" data-align=\"left\"><strong>\u8df3\u8fc7\u672c\u6b21<\/strong>\u5faa\u73af\u7684\u5269\u4f59\u4ee3\u7801\uff0c\u76f4\u63a5\u8fdb\u5165\u4e0b\u4e00\u6b21\u8fed\u4ee3\u3002<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u9047\u5230\u7ea2\u706f\uff0c\u7b49\u7eff\u706f\u4eae\u4e86\u7ee7\u7eed\u8d70\u3002<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><strong><code>pass<\/code><\/strong><\/td><td class=\"has-text-align-left\" data-align=\"left\"><strong>\u5360\u4f4d\u7b26<\/strong>\uff0c\u4ec0\u4e48\u90fd\u4e0d\u505a\u3002\u7528\u4e8e\u4fdd\u6301\u8bed\u6cd5\u5b8c\u6574\u6027\u3002<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u9047\u5230\u7ea2\u706f\uff0c\u539f\u5730\u53d1\u5446\uff08\u4e3a\u4e86\u8bed\u6cd5\u4e0d\u62a5\u9519\uff09\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4ee3\u7801\u793a\u4f8b<\/strong>\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><span>13<\/span><span>14<\/span><span>15<\/span><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\"># break \u793a\u4f8b\uff1a\u627e\u5230\u7b2c\u4e00\u4e2a\u5076\u6570\u5c31\u505c\u6b62\nfor num in [1, 3, 5, 8, 9, 10]:\n    if num % 2 == 0:\n        print(f&quot;\u627e\u5230\u5076\u6570: {num}&quot;)\n        break  # \u5faa\u73af\u5f7b\u5e95\u7ed3\u675f\n\n# continue \u793a\u4f8b\uff1a\u8df3\u8fc7\u6240\u6709\u5076\u6570\uff0c\u53ea\u6253\u5370\u5947\u6570\nfor num in range(1, 6):\n    if num % 2 == 0:\n        continue  # \u8df3\u8fc7\u672c\u6b21\uff0c\u4e0d\u6267\u884c\u4e0b\u9762\u7684 print\n    print(f&quot;\u5947\u6570: {num}&quot;)\n\n# pass \u793a\u4f8b\uff1a\u642d\u5efa\u4ee3\u7801\u6846\u67b6\u65f6\u9632\u6b62\u62a5\u9519\nfor i in range(3):\n    pass  # TODO: \u4ee5\u540e\u518d\u6765\u5199\u8fd9\u91cc\u7684\u903b\u8f91<\/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\">\u56db\u3001 Python \u72ec\u6709\u7279\u6027\uff1a\u5faa\u73af\u7684 <code>else<\/code> \u5b50\u53e5 \ud83c\udf1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Python \u7684 <code>for<\/code> \u548c <code>while<\/code> \u5faa\u73af\u90fd\u53ef\u4ee5\u5e26\u4e00\u4e2a <code>else<\/code> \u5757\u3002<br><strong>\u89c4\u5219<\/strong>\uff1a\u53ea\u6709\u5f53\u5faa\u73af<strong>\u6b63\u5e38\u7ed3\u675f<\/strong>\uff08\u5373\u6ca1\u6709\u88ab <code>break<\/code> \u5f3a\u884c\u6253\u65ad\uff09\u65f6\uff0c<code>else<\/code> \u5757\u624d\u4f1a\u6267\u884c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u7ecf\u5178\u5e94\u7528\u573a\u666f\uff1a\u641c\u7d22\u4e0e\u9a8c\u8bc1<\/strong><\/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><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">target = &quot;grape&quot;\nfruits = [&quot;apple&quot;, &quot;banana&quot;, &quot;cherry&quot;, &quot;orange&quot;]\n\nfor fruit in fruits:\n    if fruit == target:\n        print(f&quot;\u2705 \u627e\u5230\u4e86: {target}&quot;)\n        break  # \u627e\u5230\u4e86\uff0c\u6253\u65ad\u5faa\u73af\uff0celse \u5c06\u88ab\u8df3\u8fc7\nelse:\n    # \u53ea\u6709\u5f53 for \u5faa\u73af\u5b8c\u6574\u904d\u5386\u5b8c fruits\uff0c\u4e14\u6ca1\u6709\u89e6\u53d1 break \u65f6\uff0c\u624d\u4f1a\u6267\u884c\u8fd9\u91cc\n    print(f&quot;\u274c \u904d\u5386\u5b8c\u6bd5\uff0c\u672a\u627e\u5230 {target}&quot;)<\/code><\/pre><\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><em>\ud83d\udca1 \u4f18\u52bf\uff1a\u7701\u53bb\u4e86\u8bbe\u7f6e <code>found = False<\/code> \u8fd9\u6837\u7684\u989d\u5916\u6807\u5fd7\u53d8\u91cf\uff0c\u4ee3\u7801\u66f4 Pythonic\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\">\u4e94\u3001 \u5faa\u73af\u7684\u6027\u80fd\u4e0e\u6700\u4f73\u5b9e\u8df5<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">1. \u4f18\u5148\u4f7f\u7528\u201c\u63a8\u5bfc\u5f0f\u201d (Comprehensions) \u66ff\u4ee3\u7b80\u5355\u7684 <code>for<\/code> \u5faa\u73af<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u5faa\u73af\u7684\u76ee\u7684\u4ec5\u4ec5\u662f<strong>\u751f\u6210\u4e00\u4e2a\u65b0\u7684\u5217\u8868\u3001\u5b57\u5178\u6216\u96c6\u5408<\/strong>\uff0c\u8bf7\u4f7f\u7528\u63a8\u5bfc\u5f0f\u3002\u5b83\u5728\u5e95\u5c42\u7531 C \u8bed\u8a00\u4f18\u5316\uff0c\u8fd0\u884c\u901f\u5ea6\u66f4\u5feb\uff0c\u4e14\u4ee3\u7801\u66f4\u7d27\u51d1\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\"># \u274c \u4f20\u7edf for \u5faa\u73af (\u8f83\u6162\u4e14\u5570\u55e6)\nsquares = []\nfor i in range(5):\n    if i % 2 == 0:\n        squares.append(i**2)\n\n# \u2705 \u5217\u8868\u63a8\u5bfc\u5f0f (\u66f4\u5feb\u4e14\u4f18\u96c5)\nsquares = [i**2 for i in range(5) if i % 2 == 0]<\/code><\/pre><\/div><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">2. \u907f\u514d\u5728\u5faa\u73af\u4e2d\u4fee\u6539\u6b63\u5728\u904d\u5386\u7684\u5217\u8868<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4f1a\u5bfc\u81f4\u7d22\u5f15\u9519\u4e71\u6216\u8df3\u8fc7\u5143\u7d20\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\"># \u274c \u5371\u9669\u64cd\u4f5c\nnums = [1, 2, 3, 4]\nfor n in nums:\n    if n == 2:\n        nums.remove(n)  # \u53ef\u80fd\u4f1a\u5bfc\u81f4\u540e\u7eed\u5143\u7d20\u88ab\u8df3\u8fc7\n\n# \u2705 \u5b89\u5168\u505a\u6cd5\uff1a\u904d\u5386\u539f\u5217\u8868\u7684\u526f\u672c\uff0c\u6216\u4f7f\u7528\u63a8\u5bfc\u5f0f\u751f\u6210\u65b0\u5217\u8868\nnums = [n for n in nums if n != 2]<\/code><\/pre><\/div><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">3. <code>for<\/code> vs <code>while<\/code> \u7684\u9009\u62e9\u6307\u5357<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5df2\u77e5\u8fed\u4ee3\u6b21\u6570\u6216\u9700\u8981\u904d\u5386\u96c6\u5408<\/strong> \ud83d\udc49 \u7edd\u5bf9\u4f7f\u7528 <strong><code>for<\/code><\/strong> \u5faa\u73af\u3002<\/li>\n\n\n\n<li><strong>\u672a\u77e5\u5faa\u73af\u6b21\u6570\uff0c\u4f9d\u8d56\u67d0\u4e2a\u6761\u4ef6\u53d8\u4e3a False<\/strong> \ud83d\udc49 \u4f7f\u7528 <strong><code>while<\/code><\/strong> \u5faa\u73af\uff08\u5982\u7b49\u5f85\u7528\u6237\u8f93\u5165\u3001\u6e38\u620f\u4e3b\u5faa\u73af\u3001\u7f51\u7edc\u91cd\u8bd5\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u603b\u7ed3<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Python \u7684\u5faa\u73af\u8bbe\u8ba1\u54f2\u5b66\u662f <strong>\u201c\u904d\u5386\u5bf9\u8c61\u201d\u800c\u975e\u201c\u63a7\u5236\u7d22\u5f15\u201d<\/strong>\u3002\u638c\u63e1 <code>for ... in ...<\/code>\u3001<code>enumerate<\/code>\u3001<code>zip<\/code> \u4ee5\u53ca <code>break\/continue\/else<\/code> \u7684\u7ec4\u5408\uff0c\u4f60\u5c31\u80fd\u5e94\u5bf9 99% \u7684\u5faa\u73af\u9700\u6c42\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f60\u60f3\u770b\u4e00\u4e2a\u5177\u4f53\u7684\u5b9e\u6218\u4f8b\u5b50\u5417\uff1f\u6bd4\u5982\uff1a<strong>\u5982\u4f55\u7528\u5faa\u73af\u548c <code>zip<\/code> \u5feb\u901f\u5408\u5e76\u4e24\u4e2a Excel \u8868\u683c\u7684\u6570\u636e<\/strong>\uff0c\u6216\u8005<strong>\u5982\u4f55\u7528 <code>while<\/code> \u5b9e\u73b0\u4e00\u4e2a\u5e26\u6709\u8d85\u65f6\u91cd\u8bd5\u673a\u5236\u7684\u7f51\u7edc\u8bf7\u6c42<\/strong>\uff1f\u968f\u65f6\u544a\u8bc9\u6211\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Python 3 \u4e2d\uff0c\u5faa\u73af\u8bed\u53e5\u7528\u4e8e\u91cd\u590d\u6267\u884c\u4e00\u6bb5&#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-89","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\/89","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=89"}],"version-history":[{"count":1,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts\/89\/revisions"}],"predecessor-version":[{"id":90,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts\/89\/revisions\/90"}],"wp:attachment":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/media?parent=89"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/categories?post=89"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/tags?post=89"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}