{"id":1122425,"date":"2025-01-08T19:20:30","date_gmt":"2025-01-08T11:20:30","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1122425.html"},"modified":"2025-01-08T19:20:32","modified_gmt":"2025-01-08T11:20:32","slug":"python%e5%a6%82%e4%bd%95%e4%b9%8b%e5%8f%96%e5%87%ba%e5%ad%97%e5%85%b8%e7%9a%84value%e5%80%bc","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1122425.html","title":{"rendered":"python\u5982\u4f55\u4e4b\u53d6\u51fa\u5b57\u5178\u7684value\u503c"},"content":{"rendered":"<p style=\"text-align:center;\" ><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/25084303\/1e4135db-3b1c-46f8-a136-a3b067a8a6a6.webp\" alt=\"python\u5982\u4f55\u4e4b\u53d6\u51fa\u5b57\u5178\u7684value\u503c\" \/><\/p>\n<p><p> <strong>\u5728Python\u4e2d\uff0c\u6709\u591a\u79cd\u65b9\u6cd5\u53ef\u4ee5\u4ece\u5b57\u5178\u4e2d\u53d6\u51favalue\u503c<\/strong>\u3001<strong>\u6bcf\u79cd\u65b9\u6cd5\u90fd\u6709\u5176\u9002\u7528\u7684\u573a\u666f\u548c\u4f18\u7f3a\u70b9<\/strong>\u3001<strong>\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u5305\u62ec\u4f7f\u7528\u952e\u7d22\u5f15\u3001get\u65b9\u6cd5\u3001values\u65b9\u6cd5\u4ee5\u53caitems\u65b9\u6cd5<\/strong>\u3002\u5176\u4e2d\uff0c\u901a\u8fc7\u952e\u7d22\u5f15\u662f\u6700\u5e38\u89c1\u7684\u65b9\u6cd5\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528get\u65b9\u6cd5\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u5065\u58ee\u6027\u548c\u53ef\u8bfb\u6027\u3002<strong>\u4f8b\u5982\uff0c\u5728\u5904\u7406\u53ef\u80fd\u7f3a\u5c11\u67d0\u4e9b\u952e\u7684\u5b57\u5178\u65f6\uff0cget\u65b9\u6cd5\u53ef\u4ee5\u63d0\u4f9b\u4e00\u4e2a\u9ed8\u8ba4\u503c\uff0c\u4ece\u800c\u907f\u514d\u7a0b\u5e8f\u5d29\u6e83<\/strong>\u3002<\/p>\n<\/p>\n<p><p><strong>\u952e\u7d22\u5f15\u6cd5<\/strong>\uff1a\u6700\u5e38\u89c1\u4e14\u76f4\u63a5\u7684\u65b9\u5f0f\uff0c\u901a\u8fc7\u952e\u540d\u6765\u7d22\u5f15\u5b57\u5178\u4e2d\u7684\u503c\u3002<strong>get\u65b9\u6cd5<\/strong>\uff1a\u63d0\u4f9b\u4e00\u79cd\u5b89\u5168\u7684\u65b9\u5f0f\u6765\u83b7\u53d6\u503c\uff0c\u53ef\u4ee5\u8bbe\u7f6e\u9ed8\u8ba4\u503c\u3002<strong>values\u65b9\u6cd5<\/strong>\uff1a\u76f4\u63a5\u83b7\u53d6\u5b57\u5178\u4e2d\u6240\u6709\u7684\u503c\u3002<strong>items\u65b9\u6cd5<\/strong>\uff1a\u83b7\u53d6\u5b57\u5178\u4e2d\u6240\u6709\u952e\u503c\u5bf9\uff0c\u5e76\u53ef\u4ee5\u5bf9\u5176\u8fdb\u884c\u8fed\u4ee3\u5904\u7406\u3002\u4e0b\u9762\u6211\u4eec\u5c06\u8be6\u7ec6\u8ba8\u8bba\u8fd9\u4e9b\u65b9\u6cd5\u4ee5\u53ca\u5b83\u4eec\u7684\u5e94\u7528\u573a\u666f\u548c\u4f18\u7f3a\u70b9\u3002<\/p>\n<\/p>\n<p><h3>\u4e00\u3001\u952e\u7d22\u5f15\u6cd5<\/h3>\n<\/p>\n<p><p>\u952e\u7d22\u5f15\u6cd5\u662f\u6700\u76f4\u63a5\u548c\u5e38\u7528\u7684\u65b9\u5f0f\uff0c\u901a\u8fc7\u7ed9\u5b9a\u7684\u952e\u540d\u6765\u8bbf\u95ee\u5b57\u5178\u4e2d\u7684\u503c\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">my_dict = {&#39;name&#39;: &#39;Alice&#39;, &#39;age&#39;: 25, &#39;city&#39;: &#39;New York&#39;}<\/p>\n<p>print(my_dict[&#39;name&#39;])  # \u8f93\u51fa\uff1aAlice<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u8fd9\u79cd\u65b9\u6cd5\u7684\u4f18\u70b9\u662f\u8bed\u6cd5\u7b80\u5355\u3001\u76f4\u89c2\uff0c\u4f46\u5f53\u8bbf\u95ee\u7684\u952e\u4e0d\u5b58\u5728\u65f6\uff0c\u4f1a\u5f15\u53d1KeyError\u5f02\u5e38\u3002<\/p>\n<\/p>\n<p><h4>\u4f18\u70b9<\/h4>\n<\/p>\n<ul>\n<li><strong>\u7b80\u5355\u76f4\u89c2<\/strong>\uff1a\u4ee3\u7801\u6613\u8bfb\u6027\u5f3a\uff0c\u9002\u5408\u65b0\u624b\u5b66\u4e60\u3002<\/li>\n<li><strong>\u9ad8\u6548<\/strong>\uff1a\u7531\u4e8e\u76f4\u63a5\u901a\u8fc7\u952e\u8bbf\u95ee\u503c\uff0c\u901f\u5ea6\u8f83\u5feb\u3002<\/li>\n<\/ul>\n<p><h4>\u7f3a\u70b9<\/h4>\n<\/p>\n<ul>\n<li><strong>\u7f3a\u4e4f\u5065\u58ee\u6027<\/strong>\uff1a\u5f53\u952e\u4e0d\u5b58\u5728\u65f6\uff0c\u4f1a\u5f15\u53d1KeyError\u5f02\u5e38\uff0c\u53ef\u80fd\u5bfc\u81f4\u7a0b\u5e8f\u5d29\u6e83\u3002<\/li>\n<\/ul>\n<p><h3>\u4e8c\u3001get\u65b9\u6cd5<\/h3>\n<\/p>\n<p><p>get\u65b9\u6cd5\u63d0\u4f9b\u4e86\u4e00\u79cd\u66f4\u4e3a\u5b89\u5168\u7684\u65b9\u5f0f\u6765\u83b7\u53d6\u5b57\u5178\u4e2d\u7684\u503c\uff0c\u53ef\u4ee5\u8bbe\u7f6e\u4e00\u4e2a\u9ed8\u8ba4\u503c\u4ee5\u9632\u952e\u4e0d\u5b58\u5728\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">my_dict = {&#39;name&#39;: &#39;Alice&#39;, &#39;age&#39;: 25, &#39;city&#39;: &#39;New York&#39;}<\/p>\n<p>print(my_dict.get(&#39;name&#39;))  # \u8f93\u51fa\uff1aAlice<\/p>\n<p>print(my_dict.get(&#39;country&#39;, &#39;USA&#39;))  # \u8f93\u51fa\uff1aUSA<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u8fd9\u79cd\u65b9\u6cd5\u5728\u5904\u7406\u53ef\u80fd\u7f3a\u5c11\u67d0\u4e9b\u952e\u7684\u5b57\u5178\u65f6\u975e\u5e38\u6709\u7528\uff0c\u907f\u514d\u4e86\u7a0b\u5e8f\u56e0KeyError\u5f02\u5e38\u800c\u5d29\u6e83\u3002<\/p>\n<\/p>\n<p><h4>\u4f18\u70b9<\/h4>\n<\/p>\n<ul>\n<li><strong>\u5b89\u5168\u6027\u9ad8<\/strong>\uff1a\u907f\u514dKeyError\u5f02\u5e38\uff0c\u63d0\u4f9b\u9ed8\u8ba4\u503c\u3002<\/li>\n<li><strong>\u7075\u6d3b\u6027\u5f3a<\/strong>\uff1a\u53ef\u4ee5\u4e3a\u4e0d\u5b58\u5728\u7684\u952e\u8bbe\u7f6e\u9ed8\u8ba4\u503c\u3002<\/li>\n<\/ul>\n<p><h4>\u7f3a\u70b9<\/h4>\n<\/p>\n<ul>\n<li><strong>\u8bed\u6cd5\u7a0d\u590d\u6742<\/strong>\uff1a\u76f8\u8f83\u4e8e\u952e\u7d22\u5f15\u6cd5\uff0cget\u65b9\u6cd5\u7684\u8bed\u6cd5\u7a0d\u663e\u590d\u6742\u3002<\/li>\n<\/ul>\n<p><h3>\u4e09\u3001values\u65b9\u6cd5<\/h3>\n<\/p>\n<p><p>values\u65b9\u6cd5\u53ef\u4ee5\u76f4\u63a5\u83b7\u53d6\u5b57\u5178\u4e2d\u7684\u6240\u6709\u503c\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u89c6\u56fe\u5bf9\u8c61\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">my_dict = {&#39;name&#39;: &#39;Alice&#39;, &#39;age&#39;: 25, &#39;city&#39;: &#39;New York&#39;}<\/p>\n<p>print(list(my_dict.values()))  # \u8f93\u51fa\uff1a[&#39;Alice&#39;, 25, &#39;New York&#39;]<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u8fd9\u79cd\u65b9\u6cd5\u9002\u7528\u4e8e\u9700\u8981\u4e00\u6b21\u6027\u83b7\u53d6\u5b57\u5178\u4e2d\u6240\u6709\u503c\u7684\u60c5\u51b5\u3002<\/p>\n<\/p>\n<p><h4>\u4f18\u70b9<\/h4>\n<\/p>\n<ul>\n<li><strong>\u4e00\u6b21\u6027\u83b7\u53d6\u6240\u6709\u503c<\/strong>\uff1a\u65b9\u4fbf\u5bf9\u5b57\u5178\u4e2d\u6240\u6709\u503c\u8fdb\u884c\u64cd\u4f5c\u3002<\/li>\n<li><strong>\u7b80\u6d01<\/strong>\uff1a\u4ee3\u7801\u7b80\u6d01\uff0c\u6613\u4e8e\u7406\u89e3\u3002<\/li>\n<\/ul>\n<p><h4>\u7f3a\u70b9<\/h4>\n<\/p>\n<ul>\n<li><strong>\u65e0\u6cd5\u76f4\u63a5\u83b7\u53d6\u7279\u5b9a\u952e\u7684\u503c<\/strong>\uff1a\u9700\u8981\u8fdb\u4e00\u6b65\u5904\u7406\u3002<\/li>\n<\/ul>\n<p><h3>\u56db\u3001items\u65b9\u6cd5<\/h3>\n<\/p>\n<p><p>items\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u5b57\u5178\u6240\u6709\u952e\u503c\u5bf9\u7684\u89c6\u56fe\u5bf9\u8c61\uff0c\u53ef\u4ee5\u7528\u4e8e\u8fed\u4ee3\u5904\u7406\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">my_dict = {&#39;name&#39;: &#39;Alice&#39;, &#39;age&#39;: 25, &#39;city&#39;: &#39;New York&#39;}<\/p>\n<p>for key, value in my_dict.items():<\/p>\n<p>    print(f&#39;{key}: {value}&#39;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u8fd9\u79cd\u65b9\u6cd5\u9002\u7528\u4e8e\u9700\u8981\u540c\u65f6\u8bbf\u95ee\u952e\u548c\u503c\u7684\u60c5\u51b5\uff0c\u7279\u522b\u662f\u5728\u904d\u5386\u5b57\u5178\u65f6\u975e\u5e38\u6709\u7528\u3002<\/p>\n<\/p>\n<p><h4>\u4f18\u70b9<\/h4>\n<\/p>\n<ul>\n<li><strong>\u540c\u65f6\u8bbf\u95ee\u952e\u548c\u503c<\/strong>\uff1a\u65b9\u4fbf\u5728\u904d\u5386\u65f6\u8fdb\u884c\u64cd\u4f5c\u3002<\/li>\n<li><strong>\u7075\u6d3b\u6027\u9ad8<\/strong>\uff1a\u53ef\u4ee5\u5bf9\u952e\u503c\u5bf9\u8fdb\u884c\u5404\u79cd\u5904\u7406\u3002<\/li>\n<\/ul>\n<p><h4>\u7f3a\u70b9<\/h4>\n<\/p>\n<ul>\n<li><strong>\u7a0d\u663e\u590d\u6742<\/strong>\uff1a\u5bf9\u4e8e\u7b80\u5355\u53d6\u503c\u64cd\u4f5c\uff0c\u4ee3\u7801\u663e\u5f97\u5197\u957f\u3002<\/li>\n<\/ul>\n<p><h3>\u4e94\u3001\u7ed3\u5408\u591a\u79cd\u65b9\u6cd5\u7684\u5e94\u7528\u573a\u666f<\/h3>\n<\/p>\n<p><p>\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u5f80\u5f80\u9700\u8981\u7ed3\u5408\u591a\u79cd\u65b9\u6cd5\u6765\u6ee1\u8db3\u4e0d\u540c\u7684\u9700\u6c42\u3002\u4e0b\u9762\u6211\u4eec\u63a2\u8ba8\u4e00\u4e9b\u5177\u4f53\u5e94\u7528\u573a\u666f\uff1a<\/p>\n<\/p>\n<p><h4>1. \u5b89\u5168\u8bbf\u95ee\u548c\u9ed8\u8ba4\u503c\u8bbe\u7f6e<\/h4>\n<\/p>\n<p><p>\u5728\u5904\u7406\u7528\u6237\u8f93\u5165\u6216\u5916\u90e8\u6570\u636e\u65f6\uff0c\u4f7f\u7528get\u65b9\u6cd5\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u5065\u58ee\u6027\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">user_data = {&#39;username&#39;: &#39;john_doe&#39;, &#39;em<a href=\"https:\/\/docs.pingcode.com\/blog\/59162.html\" target=\"_blank\">AI<\/a>l&#39;: &#39;john@example.com&#39;}<\/p>\n<p>country = user_data.get(&#39;country&#39;, &#39;Unknown&#39;)<\/p>\n<p>print(f&#39;User country: {country}&#39;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>2. \u6279\u91cf\u5904\u7406\u503c<\/h4>\n<\/p>\n<p><p>\u5f53\u9700\u8981\u5bf9\u5b57\u5178\u4e2d\u7684\u6240\u6709\u503c\u8fdb\u884c\u6279\u91cf\u5904\u7406\u65f6\uff0cvalues\u65b9\u6cd5\u975e\u5e38\u6709\u7528\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">product_prices = {&#39;apple&#39;: 1.2, &#39;banana&#39;: 0.5, &#39;orange&#39;: 0.8}<\/p>\n<p>total_price = sum(product_prices.values())<\/p>\n<p>print(f&#39;Total price: {total_price}&#39;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>3. \u904d\u5386\u952e\u503c\u5bf9<\/h4>\n<\/p>\n<p><p>\u5728\u9700\u8981\u904d\u5386\u5b57\u5178\u5e76\u5bf9\u6bcf\u4e2a\u952e\u503c\u5bf9\u8fdb\u884c\u64cd\u4f5c\u65f6\uff0citems\u65b9\u6cd5\u662f\u6700\u4f73\u9009\u62e9\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">student_scores = {&#39;Alice&#39;: 85, &#39;Bob&#39;: 92, &#39;Charlie&#39;: 78}<\/p>\n<p>for student, score in student_scores.items():<\/p>\n<p>    print(f&#39;{student} scored {score} points&#39;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u516d\u3001\u6027\u80fd\u548c\u6548\u7387\u5206\u6790<\/h3>\n<\/p>\n<p><p>\u4e0d\u540c\u65b9\u6cd5\u5728\u6027\u80fd\u548c\u6548\u7387\u4e0a\u4e5f\u6709\u6240\u4e0d\u540c\u3002\u4e00\u822c\u6765\u8bf4\uff0c\u952e\u7d22\u5f15\u6cd5\u548cget\u65b9\u6cd5\u7684\u901f\u5ea6\u6700\u5feb\uff0c\u56e0\u4e3a\u5b83\u4eec\u76f4\u63a5\u901a\u8fc7\u54c8\u5e0c\u8868\u8bbf\u95ee\u503c\u3002\u800cvalues\u548citems\u65b9\u6cd5\u6d89\u53ca\u5230\u89c6\u56fe\u5bf9\u8c61\u7684\u521b\u5efa\uff0c\u7565\u5fae\u589e\u52a0\u4e86\u5f00\u9500\u3002<\/p>\n<\/p>\n<p><h4>1. \u952e\u7d22\u5f15\u6cd5 vs get\u65b9\u6cd5<\/h4>\n<\/p>\n<p><p>\u5728\u952e\u5b58\u5728\u7684\u60c5\u51b5\u4e0b\uff0c\u952e\u7d22\u5f15\u6cd5\u548cget\u65b9\u6cd5\u7684\u6027\u80fd\u51e0\u4e4e\u4e00\u81f4\u3002\u4f46\u5728\u952e\u4e0d\u5b58\u5728\u65f6\uff0cget\u65b9\u6cd5\u907f\u514d\u4e86\u5f02\u5e38\u5904\u7406\u7684\u5f00\u9500\u3002<\/p>\n<\/p>\n<p><h4>2. values\u65b9\u6cd5 vs items\u65b9\u6cd5<\/h4>\n<\/p>\n<p><p>values\u65b9\u6cd5\u548citems\u65b9\u6cd5\u7684\u6027\u80fd\u76f8\u8fd1\uff0c\u4e3b\u8981\u53d6\u51b3\u4e8e\u5177\u4f53\u5e94\u7528\u573a\u666f\u3002\u5728\u9700\u8981\u540c\u65f6\u8bbf\u95ee\u952e\u548c\u503c\u65f6\uff0citems\u65b9\u6cd5\u7684\u6027\u80fd\u66f4\u4f18\u3002<\/p>\n<\/p>\n<p><h3>\u4e03\u3001\u6700\u4f73\u5b9e\u8df5\u548c\u5efa\u8bae<\/h3>\n<\/p>\n<p><p>\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u6548\u7387\u548c\u53ef\u8bfb\u6027\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u6700\u4f73\u5b9e\u8df5\u548c\u5efa\u8bae\uff1a<\/p>\n<\/p>\n<p><h4>1. \u6839\u636e\u9700\u6c42\u9009\u62e9\u65b9\u6cd5<\/h4>\n<\/p>\n<ul>\n<li><strong>\u7b80\u5355\u53d6\u503c<\/strong>\uff1a\u4f18\u5148\u4f7f\u7528\u952e\u7d22\u5f15\u6cd5\u3002<\/li>\n<li><strong>\u5904\u7406\u7f3a\u7701\u503c<\/strong>\uff1a\u4f7f\u7528get\u65b9\u6cd5\u3002<\/li>\n<li><strong>\u6279\u91cf\u5904\u7406\u503c<\/strong>\uff1a\u4f7f\u7528values\u65b9\u6cd5\u3002<\/li>\n<li><strong>\u904d\u5386\u952e\u503c\u5bf9<\/strong>\uff1a\u4f7f\u7528items\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n<p><h4>2. \u63d0\u9ad8\u4ee3\u7801\u5065\u58ee\u6027<\/h4>\n<\/p>\n<p><p>\u5728\u5904\u7406\u7528\u6237\u8f93\u5165\u6216\u5916\u90e8\u6570\u636e\u65f6\uff0c\u5c3d\u91cf\u4f7f\u7528get\u65b9\u6cd5\u5e76\u8bbe\u7f6e\u9ed8\u8ba4\u503c\uff0c\u907f\u514d\u7a0b\u5e8f\u56e0KeyError\u5f02\u5e38\u5d29\u6e83\u3002<\/p>\n<\/p>\n<p><h4>3. \u8003\u8651\u6027\u80fd<\/h4>\n<\/p>\n<p><p>\u5728\u6027\u80fd\u654f\u611f\u7684\u5e94\u7528\u4e2d\uff0c\u5c3d\u91cf\u9009\u62e9\u9ad8\u6548\u7684\u65b9\u6cd5\uff0c\u5982\u952e\u7d22\u5f15\u6cd5\u548cget\u65b9\u6cd5\u3002\u540c\u65f6\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u89c6\u56fe\u5bf9\u8c61\u521b\u5efa\u3002<\/p>\n<\/p>\n<p><h3>\u516b\u3001\u603b\u7ed3<\/h3>\n<\/p>\n<p><p>\u5728Python\u4e2d\uff0c\u53d6\u51fa\u5b57\u5178\u7684value\u503c\u6709\u591a\u79cd\u65b9\u6cd5\uff0c\u6bcf\u79cd\u65b9\u6cd5\u90fd\u6709\u5176\u9002\u7528\u7684\u573a\u666f\u548c\u4f18\u7f3a\u70b9\u3002<strong>\u952e\u7d22\u5f15\u6cd5\u3001get\u65b9\u6cd5\u3001values\u65b9\u6cd5\u548citems\u65b9\u6cd5<\/strong>\u662f\u6700\u5e38\u7528\u7684\u51e0\u79cd\u65b9\u5f0f\u3002\u901a\u8fc7\u5408\u7406\u9009\u62e9\u548c\u7ed3\u5408\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u3001\u5065\u58ee\u6027\u548c\u6548\u7387\u3002\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\uff0c\u5e76\u9075\u5faa\u6700\u4f73\u5b9e\u8df5\uff0c\u53ef\u4ee5\u66f4\u597d\u5730\u5904\u7406\u5b57\u5178\u6570\u636e\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p> <strong>\u5982\u4f55\u5728Python\u4e2d\u83b7\u53d6\u5b57\u5178\u4e2d\u7279\u5b9a\u952e\u7684\u503c\uff1f<\/strong><br \/>\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u6307\u5b9a\u952e\u6765\u83b7\u53d6\u5b57\u5178\u4e2d\u7684\u503c\u3002\u4f8b\u5982\uff0c\u5047\u8bbe\u4f60\u6709\u4e00\u4e2a\u5b57\u5178<code>my_dict = {&#39;name&#39;: &#39;Alice&#39;, &#39;age&#39;: 25}<\/code>\uff0c\u53ef\u4ee5\u4f7f\u7528<code>my_dict[&#39;name&#39;]<\/code>\u6765\u83b7\u53d6\u952e\u4e3a<code>name<\/code>\u7684\u503c\uff0c\u5373<code>&#39;Alice&#39;<\/code>\u3002\u5982\u679c\u952e\u4e0d\u5b58\u5728\uff0c\u5c1d\u8bd5\u8bbf\u95ee\u5c06\u5f15\u53d1<code>KeyError<\/code>\u3002<\/p>\n<p><strong>\u5982\u679c\u6211\u60f3\u83b7\u53d6\u5b57\u5178\u4e2d\u6240\u6709\u7684\u503c\uff0c\u8be5\u600e\u4e48\u505a\uff1f<\/strong><br \/>\u8981\u83b7\u53d6\u5b57\u5178\u4e2d\u6240\u6709\u7684\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528<code>values()<\/code>\u65b9\u6cd5\u3002\u7ee7\u7eed\u4ee5\u4e0a\u9762\u7684\u4f8b\u5b50\uff0c<code>my_dict.values()<\/code>\u5c06\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u6240\u6709\u503c\u7684\u89c6\u56fe\u5bf9\u8c61\uff1a<code>dict_values([&#39;Alice&#39;, 25])<\/code>\u3002\u5982\u679c\u9700\u8981\u5c06\u5176\u8f6c\u6362\u4e3a\u5217\u8868\uff0c\u53ef\u4ee5\u4f7f\u7528<code>list(my_dict.values())<\/code>\uff0c\u7ed3\u679c\u5c06\u662f<code>[&#39;Alice&#39;, 25]<\/code>\u3002<\/p>\n<p><strong>\u5982\u4f55\u5904\u7406\u5b57\u5178\u4e2d\u4e0d\u5b58\u5728\u7684\u952e\uff0c\u4ee5\u907f\u514d\u9519\u8bef\uff1f<\/strong><br \/>\u4e3a\u4e86\u5b89\u5168\u5730\u83b7\u53d6\u5b57\u5178\u4e2d\u7684\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528<code>get()<\/code>\u65b9\u6cd5\u3002\u8fd9\u4e2a\u65b9\u6cd5\u5141\u8bb8\u4f60\u63d0\u4f9b\u4e00\u4e2a\u9ed8\u8ba4\u503c\uff0c\u4ee5\u9632\u6307\u5b9a\u7684\u952e\u4e0d\u5b58\u5728\u3002\u4f8b\u5982\uff0c<code>my_dict.get(&#39;gender&#39;, &#39;Not specified&#39;)<\/code>\u5c06\u8fd4\u56de<code>&#39;Not specified&#39;<\/code>\uff0c\u56e0\u4e3a<code>gender<\/code>\u8fd9\u4e2a\u952e\u5728\u5b57\u5178\u4e2d\u5e76\u4e0d\u5b58\u5728\u3002\u8fd9\u79cd\u65b9\u5f0f\u53ef\u4ee5\u6709\u6548\u907f\u514d<code>KeyError<\/code>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\uff0c\u6709\u591a\u79cd\u65b9\u6cd5\u53ef\u4ee5\u4ece\u5b57\u5178\u4e2d\u53d6\u51favalue\u503c\u3001\u6bcf\u79cd\u65b9\u6cd5\u90fd\u6709\u5176\u9002\u7528\u7684\u573a\u666f\u548c\u4f18\u7f3a\u70b9\u3001\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u5305\u62ec\u4f7f [&hellip;]","protected":false},"author":3,"featured_media":1122432,"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\/1122425"}],"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=1122425"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1122425\/revisions"}],"predecessor-version":[{"id":1122434,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1122425\/revisions\/1122434"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1122432"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1122425"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1122425"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1122425"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}