{"id":97,"date":"2026-06-13T21:11:45","date_gmt":"2026-06-13T13:11:45","guid":{"rendered":"https:\/\/www.52runoob.com\/?p=97"},"modified":"2026-06-13T21:11:45","modified_gmt":"2026-06-13T13:11:45","slug":"python3-%e5%88%97%e8%a1%a8-2","status":"publish","type":"post","link":"https:\/\/www.52runoob.com\/index.php\/2026\/06\/13\/python3-%e5%88%97%e8%a1%a8-2\/","title":{"rendered":"Python3\u00a0\u5217\u8868"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u5728 Python 3 \u4e2d\uff0c<strong>\u5217\u8868\uff08List\uff09<\/strong> \u662f\u6700\u5e38\u7528\u3001\u6700\u7075\u6d3b\u7684\u6570\u636e\u7ed3\u6784\u3002\u5b83\u76f8\u5f53\u4e8e\u5176\u4ed6\u8bed\u8a00\u4e2d\u7684\u201c\u52a8\u6001\u6570\u7ec4\u201d\uff0c\u4f46\u529f\u80fd\u66f4\u5f3a\u5927\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5217\u8868\u7684\u6838\u5fc3\u7279\u5f81\u662f\uff1a<strong>\u6709\u5e8f\u3001\u53ef\u53d8\uff08Mutable\uff09\u3001\u5141\u8bb8\u91cd\u590d\u5143\u7d20\u3001\u53ef\u4ee5\u5b58\u50a8\u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e<\/strong>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u6211\u5c06\u4ece<strong>\u57fa\u7840\u64cd\u4f5c<\/strong>\u3001<strong>\u6838\u5fc3\u5207\u7247\u6280\u5de7<\/strong>\u3001<strong>\u9ad8\u6548\u63a8\u5bfc\u5f0f<\/strong>\u5230<strong>\u5e38\u89c1\u9677\u9631<\/strong>\uff0c\u4e3a\u4f60\u5168\u9762\u89e3\u6790 Python 3 \u5217\u8868\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 \u521b\u5efa\u4e0e\u521d\u59cb\u5316<\/h3>\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\"># 1. \u7a7a\u5217\u8868\nempty_list = []\nempty_list_2 = list()\n\n# 2. \u5305\u542b\u5143\u7d20\u7684\u5217\u8868\nfruits = [&quot;apple&quot;, &quot;banana&quot;, &quot;cherry&quot;]\n\n# 3. \u6df7\u5408\u7c7b\u578b (Python \u5141\u8bb8\uff0c\u4f46\u4e0d\u63a8\u8350\u7528\u4e8e\u590d\u6742\u903b\u8f91)\nmixed = [1, &quot;hello&quot;, 3.14, True]\n\n# 4. \u5feb\u901f\u751f\u6210\u5217\u8868\nzeros = [0] * 5          # [0, 0, 0, 0, 0]\nrange_list = list(range(5)) # [0, 1, 2, 3, 4]<\/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 \u589e\u5220\u6539\u67e5 (CRUD)<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">1. \u67e5 (Access)<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u652f\u6301\u6b63\u5411\u7d22\u5f15\u548c\u53cd\u5411\u7d22\u5f15\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><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">nums = [10, 20, 30, 40, 50]\nprint(nums[0])   # 10 (\u7b2c\u4e00\u4e2a)\nprint(nums[-1])  # 50 (\u6700\u540e\u4e00\u4e2a)\n# print(nums[10]) # \u274c IndexError: list index out of range<\/code><\/pre><\/div><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">2. \u6539 (Update)<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u76f4\u63a5\u901a\u8fc7\u7d22\u5f15\u8d4b\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><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">nums[1] = 99\nprint(nums)  # [10, 99, 30, 40, 50]<\/code><\/pre><\/div><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">3. \u589e (Add)<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>append()<\/code>: \u5c3e\u90e8\u6dfb\u52a0\u5355\u4e2a\u5143\u7d20 (<strong>O(1)<\/strong>\uff0c\u6700\u5feb)\u3002<\/li>\n\n\n\n<li><code>insert()<\/code>: \u6307\u5b9a\u4f4d\u7f6e\u63d2\u5165 (<strong>O(n)<\/strong>\uff0c\u8f83\u6162\uff0c\u56e0\u4e3a\u8981\u79fb\u52a8\u540e\u7eed\u5143\u7d20)\u3002<\/li>\n\n\n\n<li><code>extend()<\/code>: \u6279\u91cf\u8ffd\u52a0\u53e6\u4e00\u4e2a\u53ef\u8fed\u4ee3\u5bf9\u8c61\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><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">nums.append(60)       # [10, 99, 30, 40, 50, 60]\nnums.insert(0, 5)     # [5, 10, 99, 30, 40, 50, 60]\nnums.extend([70, 80]) # [5, 10, ..., 60, 70, 80]<\/code><\/pre><\/div><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">4. \u5220 (Remove)<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>pop()<\/code>: \u5f39\u51fa\u5e76\u8fd4\u56de\u6307\u5b9a\u7d22\u5f15\u7684\u5143\u7d20\uff08\u9ed8\u8ba4\u6700\u540e\u4e00\u4e2a\uff09\u3002<\/li>\n\n\n\n<li><code>remove()<\/code>: \u5220\u9664<strong>\u7b2c\u4e00\u4e2a<\/strong>\u5339\u914d\u503c\u7684\u5143\u7d20\u3002<\/li>\n\n\n\n<li><code>del<\/code>: \u6839\u636e\u7d22\u5f15\u6216\u5207\u7247\u5220\u9664\u3002<\/li>\n\n\n\n<li><code>clear()<\/code>: \u6e05\u7a7a\u5217\u8868\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><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">last = nums.pop()     # \u5220\u9664\u5e76\u8fd4\u56de 80\nnums.remove(99)       # \u5220\u9664\u503c\u4e3a 99 \u7684\u5143\u7d20\ndel nums[0]           # \u5220\u9664\u7b2c\u4e00\u4e2a\u5143\u7d20<\/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 \u7075\u9b42\u6280\u5de7\uff1a\u5207\u7247 (Slicing) \ud83c\udf1f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5207\u7247\u662f Python \u5217\u8868\u6700\u5f3a\u5927\u7684\u529f\u80fd\u4e4b\u4e00\uff0c\u8bed\u6cd5\u4e3a <code>list[start:stop:step]<\/code>\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5de6\u95ed\u53f3\u5f00<\/strong>\uff1a\u5305\u542b <code>start<\/code>\uff0c\u4e0d\u5305\u542b <code>stop<\/code>\u3002<\/li>\n\n\n\n<li><strong>\u6b65\u957f<\/strong>\uff1a\u9ed8\u8ba4\u4e3a 1\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><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\">nums = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]\n\nprint(nums[2:5])    # [2, 3, 4] (\u7d22\u5f15 2 \u5230 4)\nprint(nums[:3])     # [0, 1, 2] (\u4ece\u5934\u5f00\u59cb)\nprint(nums[7:])     # [7, 8, 9] (\u76f4\u5230\u7ed3\u5c3e)\nprint(nums[::2])    # [0, 2, 4, 6, 8] (\u6bcf\u9694\u4e00\u4e2a\u53d6\u4e00\u4e2a)\nprint(nums[::-1])   # [9, 8, ..., 0] (\ud83d\udd25 \u7ecf\u5178\u7528\u6cd5\uff1a\u5217\u8868\u53cd\u8f6c)<\/code><\/pre><\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><em>\ud83d\udca1 \u6ce8\u610f\uff1a\u5207\u7247\u64cd\u4f5c\u8fd4\u56de\u7684\u662f\u539f\u5217\u8868\u7684\u4e00\u4e2a<strong>\u6d45\u62f7\u8d1d\uff08Shallow Copy\uff09<\/strong>\uff0c\u4fee\u6539\u5207\u7247\u7ed3\u679c\u4e0d\u4f1a\u5f71\u54cd\u539f\u5217\u8868\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\">\u56db\u3001 \u73b0\u4ee3 Python \u5229\u5668\uff1a\u5217\u8868\u63a8\u5bfc\u5f0f (List Comprehension)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u662f\u533a\u5206\u65b0\u624b\u548c\u9ad8\u624b\u7684\u5173\u952e\u3002\u5f53\u9700\u8981\u6839\u636e\u65e7\u5217\u8868\u751f\u6210\u65b0\u5217\u8868\u65f6\uff0c<strong>\u6c38\u8fdc\u4f18\u5148\u4f7f\u7528\u63a8\u5bfc\u5f0f<\/strong>\uff0c\u5b83\u6bd4\u4f20\u7edf\u7684 <code>for<\/code> \u5faa\u73af + <code>append<\/code> \u66f4\u5feb\u3001\u66f4\u7b80\u6d01\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u8bed\u6cd5<\/strong>\uff1a<code>[\u8868\u8fbe\u5f0f for \u53d8\u91cf in \u53ef\u8fed\u4ee3\u5bf9\u8c61 if \u6761\u4ef6]<\/code><\/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><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\"># \u573a\u666f 1\uff1a\u751f\u6210 0-9 \u7684\u5e73\u65b9\nsquares = [x**2 for x in range(10)]\n# \u7b49\u4ef7\u4e8e:\n# squares = []\n# for x in range(10):\n#     squares.append(x**2)\n\n# \u573a\u666f 2\uff1a\u8fc7\u6ee4\u5076\u6570\u5e76\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\nevens_str = [str(x) for x in range(10) if x % 2 == 0]\n# \u8f93\u51fa: [&#039;0&#039;, &#039;2&#039;, &#039;4&#039;, &#039;6&#039;, &#039;8&#039;]\n\n# \u573a\u666f 3\uff1a\u5d4c\u5957\u5faa\u73af (\u751f\u6210\u5750\u6807\u70b9)\npoints = [(x, y) for x in range(2) for y in range(2)]\n# \u8f93\u51fa: [(0, 0), (0, 1), (1, 0), (1, 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 \u5e38\u7528\u5185\u7f6e\u51fd\u6570\u4e0e\u65b9\u6cd5<\/h3>\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\">\u65b9\u6cd5\/\u51fd\u6570<\/th><th class=\"has-text-align-left\" data-align=\"left\">\u4f5c\u7528<\/th><th class=\"has-text-align-left\" data-align=\"left\">\u65f6\u95f4\u590d\u6742\u5ea6<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\"><code>len(list)<\/code><\/td><td class=\"has-text-align-left\" data-align=\"left\">\u83b7\u53d6\u957f\u5ea6<\/td><td class=\"has-text-align-left\" data-align=\"left\">O(1)<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><code>list.sort()<\/code><\/td><td class=\"has-text-align-left\" data-align=\"left\"><strong>\u539f\u5730<\/strong>\u6392\u5e8f (\u4fee\u6539\u539f\u5217\u8868)<\/td><td class=\"has-text-align-left\" data-align=\"left\">O(n log n)<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><code>sorted(list)<\/code><\/td><td class=\"has-text-align-left\" data-align=\"left\">\u8fd4\u56de<strong>\u65b0<\/strong>\u7684\u6392\u5e8f\u5217\u8868 (\u4e0d\u4fee\u6539\u539f\u5217\u8868)<\/td><td class=\"has-text-align-left\" data-align=\"left\">O(n log n)<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><code>list.reverse()<\/code><\/td><td class=\"has-text-align-left\" data-align=\"left\"><strong>\u539f\u5730<\/strong>\u53cd\u8f6c<\/td><td class=\"has-text-align-left\" data-align=\"left\">O(n)<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><code>list.index(val)<\/code><\/td><td class=\"has-text-align-left\" data-align=\"left\">\u67e5\u627e\u503c\u7b2c\u4e00\u6b21\u51fa\u73b0\u7684\u7d22\u5f15<\/td><td class=\"has-text-align-left\" data-align=\"left\">O(n)<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><code>list.count(val)<\/code><\/td><td class=\"has-text-align-left\" data-align=\"left\">\u7edf\u8ba1\u503c\u51fa\u73b0\u7684\u6b21\u6570<\/td><td class=\"has-text-align-left\" data-align=\"left\">O(n)<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\"><code>val in list<\/code><\/td><td class=\"has-text-align-left\" data-align=\"left\">\u5224\u65ad\u503c\u662f\u5426\u5b58\u5728<\/td><td class=\"has-text-align-left\" data-align=\"left\"><strong>O(n)<\/strong> (\u6162\uff01\u89c1\u4e0b\u6587\u9677\u9631)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u516d\u3001 \u26a0\ufe0f \u4e09\u5927\u5e38\u89c1\u9677\u9631 (\u907f\u5751\u6307\u5357)<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u9677\u9631 1\uff1a\u6d45\u62f7\u8d1d\u4e0e\u5f15\u7528\u95ee\u9898<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u4f60\u4f7f\u7528 <code>=<\/code> \u8d4b\u503c\u5217\u8868\u65f6\uff0c\u53ea\u662f\u590d\u5236\u4e86<strong>\u5f15\u7528<\/strong>\uff08\u6307\u9488\uff09\uff0c\u800c\u4e0d\u662f\u590d\u5236\u6570\u636e\u3002\u4fee\u6539\u5176\u4e2d\u4e00\u4e2a\uff0c\u53e6\u4e00\u4e2a\u4e5f\u4f1a\u53d8\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\">a = [1, 2, 3]\nb = a          # b \u6307\u5411\u540c\u4e00\u4e2a\u5185\u5b58\u5730\u5740\nb.append(4)\nprint(a)       # [1, 2, 3, 4] \ud83d\ude31 a \u4e5f\u88ab\u6539\u53d8\u4e86\uff01\n\n# \u2705 \u6b63\u786e\u62f7\u8d1d\u65b9\u5f0f\uff1a\nc = a[:]       # \u5207\u7247\u62f7\u8d1d\nd = a.copy()   # \u65b9\u6cd5\u62f7\u8d1d\ne = list(a)    # \u6784\u9020\u51fd\u6570\u62f7\u8d1d<\/code><\/pre><\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><em>(\u6ce8\uff1a\u5982\u679c\u5217\u8868\u4e2d\u5305\u542b\u5d4c\u5957\u5217\u8868\uff0c\u4ee5\u4e0a\u65b9\u6cd5\u5747\u4e3a\u6d45\u62f7\u8d1d\uff0c\u9700\u4f7f\u7528 <code>copy.deepcopy()<\/code>)<\/em><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u9677\u9631 2\uff1a\u5728\u904d\u5386\u5217\u8868\u65f6\u5220\u9664\u5143\u7d20<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4f1a\u5bfc\u81f4\u7d22\u5f15\u9519\u4e71\uff0c\u8df3\u8fc7\u67d0\u4e9b\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><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\">nums = [1, 2, 2, 3, 4]\n\n# \u274c \u9519\u8bef\u505a\u6cd5\nfor n in nums:\n    if n == 2:\n        nums.remove(n) \n# \u7ed3\u679c\u53ef\u80fd\u4e0d\u7b26\u5408\u9884\u671f\uff0c\u56e0\u4e3a\u5217\u8868\u957f\u5ea6\u5728\u53d8\u5316\n\n# \u2705 \u6b63\u786e\u505a\u6cd5 1\uff1a\u5217\u8868\u63a8\u5bfc\u5f0f (\u63a8\u8350)\nnums = [n for n in nums if n != 2]\n\n# \u2705 \u6b63\u786e\u505a\u6cd5 2\uff1a\u5012\u5e8f\u904d\u5386\nfor i in range(len(nums)-1, -1, -1):\n    if nums[i] == 2:\n        del nums[i]<\/code><\/pre><\/div><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">\u9677\u9631 3\uff1a\u8bef\u7528 <code>in<\/code> \u8fdb\u884c\u5927\u91cf\u67e5\u627e<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><code>if x in my_list<\/code> \u7684\u65f6\u95f4\u590d\u6742\u5ea6\u662f <strong>O(n)<\/strong>\u3002\u5982\u679c\u5217\u8868\u5f88\u5927\u4e14\u9700\u8981\u9891\u7e41\u67e5\u627e\uff0c\u8bf7\u5c06\u5176\u8f6c\u6362\u4e3a <strong>\u96c6\u5408 (<code>set<\/code>)<\/strong>\uff0c\u67e5\u627e\u901f\u5ea6\u5c06\u63d0\u5347\u81f3 <strong>O(1)<\/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><\/div><pre class=\"chp-pre\" style=\"font-size:14px;\"><code class=\"language-plaintext\"># \u6162\nif target in huge_list: ...\n\n# \u5feb\nhuge_set = set(huge_list)\nif target in huge_set: ...<\/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\">\u4e03\u3001 \u603b\u7ed3\uff1a\u5217\u8868 vs \u5176\u4ed6\u7ed3\u6784<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9700\u8981<strong>\u6709\u5e8f<\/strong>\u4e14<strong>\u9891\u7e41\u4fee\u6539<\/strong>\uff1f \ud83d\udc49 <strong>List<\/strong><\/li>\n\n\n\n<li>\u9700\u8981<strong>\u5feb\u901f\u67e5\u627e<\/strong>\u662f\u5426\u5b58\u5728\uff1f \ud83d\udc49 <strong>Set<\/strong><\/li>\n\n\n\n<li>\u9700\u8981<strong>\u952e\u503c\u5bf9\u6620\u5c04<\/strong>\uff1f \ud83d\udc49 <strong>Dict<\/strong><\/li>\n\n\n\n<li>\u6570\u636e<strong>\u4e0d\u53ef\u53d8<\/strong>\u4e14\u4f5c\u4e3a\u5b57\u5178 Key\uff1f \ud83d\udc49 <strong>Tuple<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5217\u8868\u662f Python \u7684\u57fa\u77f3\u3002\u638c\u63e1<strong>\u5207\u7247<\/strong>\u548c<strong>\u63a8\u5bfc\u5f0f<\/strong>\uff0c\u4f60\u5c31\u638c\u63e1\u4e86 Python \u5217\u8868\u7684\u7cbe\u9ad3\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\u4e00\u884c\u4ee3\u7801\u5b9e\u73b0\u77e9\u9635\u8f6c\u7f6e<\/strong>\uff0c\u6216\u8005<strong>\u5982\u4f55\u9ad8\u6548\u5408\u5e76\u4e24\u4e2a\u6709\u5e8f\u5217\u8868<\/strong>\uff1f\u968f\u65f6\u544a\u8bc9\u6211\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Python 3 \u4e2d\uff0c\u5217\u8868\uff08List\uff09 \u662f\u6700\u5e38\u7528\u3001\u6700\u7075\u6d3b&hellip;<\/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-97","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\/97","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=97"}],"version-history":[{"count":1,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts\/97\/revisions"}],"predecessor-version":[{"id":98,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts\/97\/revisions\/98"}],"wp:attachment":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/media?parent=97"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/categories?post=97"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/tags?post=97"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}