{"id":1155219,"date":"2025-01-13T18:00:41","date_gmt":"2025-01-13T10:00:41","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1155219.html"},"modified":"2025-01-13T18:00:44","modified_gmt":"2025-01-13T10:00:44","slug":"python%e5%a6%82%e4%bd%95%e7%bb%99key%e8%b5%8b%e5%80%bc","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1155219.html","title":{"rendered":"python\u5982\u4f55\u7ed9key\u8d4b\u503c"},"content":{"rendered":"<p style=\"text-align:center;\" ><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/25184651\/5c647009-9abd-4e53-bdf9-c77462db0933.webp\" alt=\"python\u5982\u4f55\u7ed9key\u8d4b\u503c\" \/><\/p>\n<p><p> <strong>\u4f7f\u7528\u5b57\u5178\u8d4b\u503c\u3001\u4f7f\u7528setdefault\u65b9\u6cd5\u3001\u4f7f\u7528defaultdict\u6a21\u5757<\/strong><\/p>\n<\/p>\n<p><p>\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u7ed9\u5b57\u5178\u7684\u952e\uff08key\uff09\u8d4b\u503c\u3002\u6700\u5e38\u89c1\u7684\u65b9\u6cd5\u662f\u76f4\u63a5\u4f7f\u7528\u5b57\u5178\u8d4b\u503c\uff0c\u6b64\u5916\u8fd8\u53ef\u4ee5\u4f7f\u7528<code>setdefault<\/code>\u65b9\u6cd5\u4ee5\u53ca<code>defaultdict<\/code>\u6a21\u5757\u3002\u4e0b\u9762\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u5e76\u91cd\u70b9\u8bb2\u89e3\u5982\u4f55\u4f7f\u7528\u5b57\u5178\u8d4b\u503c\u3002<\/p>\n<\/p>\n<p><p><strong>\u5b57\u5178\u8d4b\u503c\u65b9\u6cd5<\/strong><\/p>\n<p>\u5b57\u5178\u662fPython\u4e2d\u4e00\u79cd\u975e\u5e38\u91cd\u8981\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5b83\u4ee5\u952e-\u503c\u5bf9\u7684\u5f62\u5f0f\u5b58\u50a8\u6570\u636e\u3002\u53ef\u4ee5\u901a\u8fc7\u76f4\u63a5\u8d4b\u503c\u7684\u65b9\u5f0f\u5411\u5b57\u5178\u6dfb\u52a0\u952e\u548c\u503c\u3002\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">my_dict = {}<\/p>\n<p>my_dict[&#39;key1&#39;] = &#39;value1&#39;<\/p>\n<p>my_dict[&#39;key2&#39;] = &#39;value2&#39;<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u8fd9\u79cd\u65b9\u6cd5\u975e\u5e38\u7b80\u5355\uff0c\u76f4\u63a5\u5c06\u5b57\u5178\u7684\u952e\u548c\u5bf9\u5e94\u7684\u503c\u5199\u660e\u5373\u53ef\u3002\u5982\u679c\u952e\u4e0d\u5b58\u5728\uff0cPython\u4f1a\u81ea\u52a8\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u952e\u503c\u5bf9\u3002\u5982\u679c\u952e\u5df2\u7ecf\u5b58\u5728\uff0c\u5219\u4f1a\u66f4\u65b0\u5bf9\u5e94\u7684\u503c\u3002<\/p>\n<\/p>\n<p><p><strong>\u4e00\u3001\u5b57\u5178\u8d4b\u503c\u65b9\u6cd5<\/strong><\/p>\n<p>\u4f7f\u7528\u5b57\u5178\u76f4\u63a5\u8d4b\u503c\u662f\u4e00\u79cd\u6700\u5e38\u89c1\u7684\u65b9\u5f0f\u3002\u4e0b\u9762\u8be6\u7ec6\u4ecb\u7ecd\u8fd9\u79cd\u65b9\u6cd5\uff1a<\/p>\n<\/p>\n<p><h3>1\u3001\u5b57\u5178\u8d4b\u503c\u57fa\u672c\u7528\u6cd5<\/h3>\n<\/p>\n<p><p>\u5b57\u5178\u8d4b\u503c\u662f\u901a\u8fc7\u5c06\u5b57\u5178\u7684\u952e\u548c\u503c\u8fdb\u884c\u5173\u8054\u6765\u5b8c\u6210\u7684\u3002\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">student_scores = {}<\/p>\n<p>student_scores[&#39;Alice&#39;] = 85<\/p>\n<p>student_scores[&#39;Bob&#39;] = 90<\/p>\n<p>print(student_scores)  # \u8f93\u51fa: {&#39;Alice&#39;: 85, &#39;Bob&#39;: 90}<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u521b\u5efa\u4e86\u4e00\u4e2a\u7a7a\u5b57\u5178<code>student_scores<\/code>\uff0c\u7136\u540e\u901a\u8fc7\u952e<code>&#39;Alice&#39;<\/code>\u548c<code>&#39;Bob&#39;<\/code>\u5206\u522b\u4e3a\u5176\u8d4b\u503c85\u548c90\u3002<\/p>\n<\/p>\n<p><h3>2\u3001\u66f4\u65b0\u5b57\u5178\u4e2d\u7684\u503c<\/h3>\n<\/p>\n<p><p>\u5982\u679c\u952e\u5df2\u7ecf\u5b58\u5728\uff0c\u5219\u4f1a\u66f4\u65b0\u5176\u5bf9\u5e94\u7684\u503c\u3002\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">student_scores = {&#39;Alice&#39;: 85, &#39;Bob&#39;: 90}<\/p>\n<p>student_scores[&#39;Alice&#39;] = 95<\/p>\n<p>print(student_scores)  # \u8f93\u51fa: {&#39;Alice&#39;: 95, &#39;Bob&#39;: 90}<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u952e<code>&#39;Alice&#39;<\/code>\u5df2\u7ecf\u5b58\u5728\uff0c\u56e0\u6b64\u5176\u503c\u4ece85\u66f4\u65b0\u4e3a95\u3002<\/p>\n<\/p>\n<p><h3>3\u3001\u5b57\u5178\u8d4b\u503c\u7684\u5176\u4ed6\u7528\u6cd5<\/h3>\n<\/p>\n<p><p>\u5b57\u5178\u8d4b\u503c\u8fd8\u53ef\u4ee5\u7528\u4e8e\u5d4c\u5957\u5b57\u5178\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u5d4c\u5957\u5b57\u5178\u6765\u5b58\u50a8\u5b66\u751f\u7684\u591a\u95e8\u8bfe\u7a0b\u6210\u7ee9\u3002\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">student_scores = {}<\/p>\n<p>student_scores[&#39;Alice&#39;] = {&#39;Math&#39;: 85, &#39;Science&#39;: 90}<\/p>\n<p>student_scores[&#39;Bob&#39;] = {&#39;Math&#39;: 78, &#39;Science&#39;: 88}<\/p>\n<p>print(student_scores)<\/p>\n<h2><strong>\u8f93\u51fa: {&#39;Alice&#39;: {&#39;Math&#39;: 85, &#39;Science&#39;: 90}, &#39;Bob&#39;: {&#39;Math&#39;: 78, &#39;Science&#39;: 88}}<\/strong><\/h2>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c<code>student_scores<\/code>\u662f\u4e00\u4e2a\u5d4c\u5957\u5b57\u5178\uff0c\u6bcf\u4e2a\u5b66\u751f\u7684\u6210\u7ee9\u662f\u4e00\u4e2a\u5b50\u5b57\u5178\uff0c\u5b58\u50a8\u4e86\u4e0d\u540c\u8bfe\u7a0b\u7684\u6210\u7ee9\u3002<\/p>\n<\/p>\n<p><p><strong>\u4e8c\u3001setdefault\u65b9\u6cd5<\/strong><\/p>\n<p><code>setdefault<\/code>\u65b9\u6cd5\u7528\u4e8e\u5728\u5b57\u5178\u4e2d\u67e5\u627e\u952e\uff0c\u5982\u679c\u952e\u4e0d\u5b58\u5728\uff0c\u5219\u5c06\u952e\u548c\u6307\u5b9a\u7684\u503c\u6dfb\u52a0\u5230\u5b57\u5178\u4e2d\u3002\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">my_dict = {}<\/p>\n<p>my_dict.setdefault(&#39;key1&#39;, &#39;default_value&#39;)<\/p>\n<p>print(my_dict)  # \u8f93\u51fa: {&#39;key1&#39;: &#39;default_value&#39;}<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u4f7f\u7528<code>setdefault<\/code>\u65b9\u6cd5\u67e5\u627e\u952e<code>&#39;key1&#39;<\/code>\uff0c\u5982\u679c\u952e\u4e0d\u5b58\u5728\uff0c\u5219\u5c06\u5176\u6dfb\u52a0\u5230\u5b57\u5178\u4e2d\uff0c\u5e76\u8d4b\u503c\u4e3a<code>&#39;default_value&#39;<\/code>\u3002<\/p>\n<\/p>\n<p><h3>1\u3001setdefault\u65b9\u6cd5\u7684\u57fa\u672c\u7528\u6cd5<\/h3>\n<\/p>\n<p><p><code>setdefault<\/code>\u65b9\u6cd5\u7684\u57fa\u672c\u7528\u6cd5\u662f\u5148\u67e5\u627e\u952e\uff0c\u5982\u679c\u952e\u5b58\u5728\u5219\u8fd4\u56de\u5bf9\u5e94\u7684\u503c\uff0c\u5982\u679c\u952e\u4e0d\u5b58\u5728\u5219\u6dfb\u52a0\u952e\u5e76\u8d4b\u4e88\u9ed8\u8ba4\u503c\u3002\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">my_dict = {&#39;key1&#39;: &#39;value1&#39;}<\/p>\n<p>value = my_dict.setdefault(&#39;key2&#39;, &#39;default_value&#39;)<\/p>\n<p>print(my_dict)  # \u8f93\u51fa: {&#39;key1&#39;: &#39;value1&#39;, &#39;key2&#39;: &#39;default_value&#39;}<\/p>\n<p>print(value)  # \u8f93\u51fa: default_value<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u952e<code>&#39;key2&#39;<\/code>\u4e0d\u5b58\u5728\uff0c\u56e0\u6b64\u6dfb\u52a0\u952e\u5e76\u8d4b\u4e88\u9ed8\u8ba4\u503c<code>&#39;default_value&#39;<\/code>\uff0c\u8fd4\u56de\u503c\u4e5f\u662f<code>&#39;default_value&#39;<\/code>\u3002<\/p>\n<\/p>\n<p><h3>2\u3001setdefault\u65b9\u6cd5\u7684\u5b9e\u9645\u5e94\u7528<\/h3>\n<\/p>\n<p><p><code>setdefault<\/code>\u65b9\u6cd5\u5728\u5904\u7406\u5b57\u5178\u7684\u5d4c\u5957\u7ed3\u6784\u65f6\u975e\u5e38\u6709\u7528\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528<code>setdefault<\/code>\u65b9\u6cd5\u521d\u59cb\u5316\u5d4c\u5957\u5b57\u5178\u3002\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">student_scores = {}<\/p>\n<p>student_scores.setdefault(&#39;Alice&#39;, {}).setdefault(&#39;Math&#39;, 85)<\/p>\n<p>student_scores.setdefault(&#39;Bob&#39;, {}).setdefault(&#39;Science&#39;, 90)<\/p>\n<p>print(student_scores)<\/p>\n<h2><strong>\u8f93\u51fa: {&#39;Alice&#39;: {&#39;Math&#39;: 85}, &#39;Bob&#39;: {&#39;Science&#39;: 90}}<\/strong><\/h2>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u4f7f\u7528<code>setdefault<\/code>\u65b9\u6cd5\u521d\u59cb\u5316\u5d4c\u5957\u5b57\u5178\u7ed3\u6784\uff0c\u786e\u4fdd\u5728\u6dfb\u52a0\u6210\u7ee9\u65f6\u4e0d\u4f1a\u51fa\u73b0\u952e\u4e0d\u5b58\u5728\u7684\u9519\u8bef\u3002<\/p>\n<\/p>\n<p><p><strong>\u4e09\u3001defaultdict\u6a21\u5757<\/strong><\/p>\n<p><code>defaultdict<\/code>\u662f<code>collections<\/code>\u6a21\u5757\u4e2d\u7684\u4e00\u4e2a\u7c7b\uff0c\u7528\u4e8e\u5904\u7406\u5b57\u5178\u7684\u9ed8\u8ba4\u503c\u3002\u5728\u521d\u59cb\u5316<code>defaultdict<\/code>\u65f6\uff0c\u53ef\u4ee5\u6307\u5b9a\u4e00\u4e2a\u5de5\u5382\u51fd\u6570\uff0c\u9ed8\u8ba4\u503c\u5c06\u7531\u5de5\u5382\u51fd\u6570\u751f\u6210\u3002\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">from collections import defaultdict<\/p>\n<p>my_dict = defaultdict(int)<\/p>\n<p>my_dict[&#39;key1&#39;] += 1<\/p>\n<p>print(my_dict)  # \u8f93\u51fa: {&#39;key1&#39;: 1}<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c<code>defaultdict<\/code>\u4f7f\u7528<code>int<\/code>\u4f5c\u4e3a\u5de5\u5382\u51fd\u6570\uff0c\u952e<code>&#39;key1&#39;<\/code>\u7684\u9ed8\u8ba4\u503c\u4e3a0\uff0c\u56e0\u6b64\u53ef\u4ee5\u76f4\u63a5\u8fdb\u884c\u52a0\u6cd5\u64cd\u4f5c\u3002<\/p>\n<\/p>\n<p><h3>1\u3001defaultdict\u7684\u57fa\u672c\u7528\u6cd5<\/h3>\n<\/p>\n<p><p><code>defaultdict<\/code>\u7684\u57fa\u672c\u7528\u6cd5\u662f\u521d\u59cb\u5316\u65f6\u6307\u5b9a\u4e00\u4e2a\u5de5\u5382\u51fd\u6570\uff0c\u5b57\u5178\u7684\u9ed8\u8ba4\u503c\u5c06\u7531\u5de5\u5382\u51fd\u6570\u751f\u6210\u3002\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">from collections import defaultdict<\/p>\n<p>my_dict = defaultdict(list)<\/p>\n<p>my_dict[&#39;key1&#39;].append(&#39;value1&#39;)<\/p>\n<p>print(my_dict)  # \u8f93\u51fa: {&#39;key1&#39;: [&#39;value1&#39;]}<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c<code>defaultdict<\/code>\u4f7f\u7528<code>list<\/code>\u4f5c\u4e3a\u5de5\u5382\u51fd\u6570\uff0c\u952e<code>&#39;key1&#39;<\/code>\u7684\u9ed8\u8ba4\u503c\u4e3a\u4e00\u4e2a\u7a7a\u5217\u8868\uff0c\u56e0\u6b64\u53ef\u4ee5\u76f4\u63a5\u8fdb\u884c\u8ffd\u52a0\u64cd\u4f5c\u3002<\/p>\n<\/p>\n<p><h3>2\u3001defaultdict\u7684\u5b9e\u9645\u5e94\u7528<\/h3>\n<\/p>\n<p><p><code>defaultdict<\/code>\u5728\u5904\u7406\u5b57\u5178\u7684\u5d4c\u5957\u7ed3\u6784\u548c\u8ba1\u6570\u64cd\u4f5c\u65f6\u975e\u5e38\u6709\u7528\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528<code>defaultdict<\/code>\u7edf\u8ba1\u5355\u8bcd\u51fa\u73b0\u7684\u6b21\u6570\u3002\u793a\u4f8b\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">from collections import defaultdict<\/p>\n<p>word_count = defaultdict(int)<\/p>\n<p>words = [&#39;apple&#39;, &#39;banana&#39;, &#39;apple&#39;, &#39;orange&#39;, &#39;banana&#39;, &#39;apple&#39;]<\/p>\n<p>for word in words:<\/p>\n<p>    word_count[word] += 1<\/p>\n<p>print(word_count)<\/p>\n<h2><strong>\u8f93\u51fa: defaultdict(&lt;class &#39;int&#39;&gt;, {&#39;apple&#39;: 3, &#39;banana&#39;: 2, &#39;orange&#39;: 1})<\/strong><\/h2>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u4f7f\u7528<code>defaultdict<\/code>\u7edf\u8ba1\u5355\u8bcd\u51fa\u73b0\u7684\u6b21\u6570\uff0c\u7b80\u5316\u4e86\u4ee3\u7801\u7684\u7f16\u5199\u3002<\/p>\n<\/p>\n<p><p><strong>\u56db\u3001\u603b\u7ed3<\/strong><\/p>\n<p>\u5728Python\u4e2d\uff0c\u7ed9\u5b57\u5178\u7684\u952e\u8d4b\u503c\u6709\u591a\u79cd\u65b9\u6cd5\uff0c\u6700\u5e38\u89c1\u7684\u662f\u76f4\u63a5\u4f7f\u7528\u5b57\u5178\u8d4b\u503c\u3002\u6b64\u5916\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528<code>setdefault<\/code>\u65b9\u6cd5\u548c<code>defaultdict<\/code>\u6a21\u5757\u3002<strong>\u4f7f\u7528\u5b57\u5178\u8d4b\u503c\u65f6\uff0c\u53ef\u4ee5\u76f4\u63a5\u4e3a\u952e\u8d4b\u503c\uff0c\u66f4\u65b0\u952e\u7684\u503c\uff0c\u6216\u8005\u521b\u5efa\u5d4c\u5957\u5b57\u5178<\/strong>\u3002<strong>\u4f7f\u7528<code>setdefault<\/code>\u65b9\u6cd5\u65f6\uff0c\u53ef\u4ee5\u67e5\u627e\u952e\u5e76\u5728\u952e\u4e0d\u5b58\u5728\u65f6\u6dfb\u52a0\u952e\u5e76\u8d4b\u4e88\u9ed8\u8ba4\u503c<\/strong>\u3002<strong>\u4f7f\u7528<code>defaultdict<\/code>\u6a21\u5757\u65f6\uff0c\u53ef\u4ee5\u6307\u5b9a\u5de5\u5382\u51fd\u6570\u751f\u6210\u9ed8\u8ba4\u503c\uff0c\u7b80\u5316\u5d4c\u5957\u7ed3\u6784\u548c\u8ba1\u6570\u64cd\u4f5c<\/strong>\u3002\u901a\u8fc7\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u4f7f\u4ee3\u7801\u66f4\u7b80\u6d01\u3001\u6613\u8bfb\u548c\u9ad8\u6548\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p> <strong>\u5982\u4f55\u5728Python\u4e2d\u4e3a\u5b57\u5178\u7684\u952e\u8d4b\u503c\uff1f<\/strong><br \/>\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u5b57\u5178\u7684\u952e\u6765\u8d4b\u503c\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u5b57\u5178\u5e76\u76f4\u63a5\u901a\u8fc7\u952e\u8fdb\u884c\u8d4b\u503c\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"language-python\">my_dict = {}\nmy_dict[&#39;key1&#39;] = &#39;value1&#39;\nprint(my_dict)  # \u8f93\u51fa: {&#39;key1&#39;: &#39;value1&#39;}\n<\/code><\/pre>\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c<code>key1<\/code>\u88ab\u8d4b\u503c\u4e3a<code>value1<\/code>\uff0c\u5e76\u4e14\u53ef\u4ee5\u968f\u65f6\u66f4\u65b0\u6216\u4fee\u6539\u8fd9\u4e2a\u503c\u3002<\/p>\n<p><strong>\u5982\u4f55\u5728Python\u4e2d\u66f4\u65b0\u5df2\u5b58\u5728\u952e\u7684\u503c\uff1f<\/strong><br \/>\u82e5\u8981\u66f4\u65b0\u5b57\u5178\u4e2d\u5df2\u5b58\u5728\u952e\u7684\u503c\uff0c\u53ea\u9700\u4f7f\u7528\u8be5\u952e\u518d\u6b21\u8d4b\u503c\u3002\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre><code class=\"language-python\">my_dict[&#39;key1&#39;] = &#39;new_value&#39;\nprint(my_dict)  # \u8f93\u51fa: {&#39;key1&#39;: &#39;new_value&#39;}\n<\/code><\/pre>\n<p>\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u53ef\u4ee5\u65b9\u4fbf\u5730\u66f4\u6539\u5b57\u5178\u4e2d\u4efb\u4f55\u952e\u7684\u503c\uff0c\u786e\u4fdd\u6570\u636e\u7684\u7075\u6d3b\u6027\u4e0e\u53ef\u64cd\u4f5c\u6027\u3002<\/p>\n<p><strong>\u5728Python\u4e2d\u5982\u4f55\u6dfb\u52a0\u591a\u4e2a\u952e\u503c\u5bf9\u5230\u5b57\u5178\u4e2d\uff1f<\/strong><br \/>\u53ef\u4ee5\u4f7f\u7528\u66f4\u65b0\u65b9\u6cd5\u6216\u76f4\u63a5\u8d4b\u503c\u7684\u65b9\u5f0f\u4e00\u6b21\u6027\u6dfb\u52a0\u591a\u4e2a\u952e\u503c\u5bf9\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"language-python\">my_dict.update({&#39;key2&#39;: &#39;value2&#39;, &#39;key3&#39;: &#39;value3&#39;})\nprint(my_dict)  # \u8f93\u51fa: {&#39;key1&#39;: &#39;new_value&#39;, &#39;key2&#39;: &#39;value2&#39;, &#39;key3&#39;: &#39;value3&#39;}\n<\/code><\/pre>\n<p>\u4f7f\u7528<code>update()<\/code>\u65b9\u6cd5\u53ef\u4ee5\u5c06\u591a\u4e2a\u952e\u503c\u5bf9\u540c\u65f6\u6dfb\u52a0\u5230\u5b57\u5178\u4e2d\uff0c\u6781\u5927\u5730\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u7b80\u6d01\u6027\u548c\u53ef\u8bfb\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u4f7f\u7528\u5b57\u5178\u8d4b\u503c\u3001\u4f7f\u7528setdefault\u65b9\u6cd5\u3001\u4f7f\u7528defaultdict\u6a21\u5757 \u5728Python\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f [&hellip;]","protected":false},"author":3,"featured_media":1155226,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1155219"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=1155219"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1155219\/revisions"}],"predecessor-version":[{"id":1155227,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1155219\/revisions\/1155227"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1155226"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1155219"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1155219"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1155219"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}