{"id":1048273,"date":"2024-12-31T13:49:34","date_gmt":"2024-12-31T05:49:34","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1048273.html"},"modified":"2024-12-31T13:49:37","modified_gmt":"2024-12-31T05:49:37","slug":"python%e5%a6%82%e4%bd%95%e6%a0%b9%e6%8d%ae%e7%b4%a2%e5%bc%95%e6%89%belist%e4%b8%ad%e5%85%83%e7%b4%a0","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1048273.html","title":{"rendered":"python\u5982\u4f55\u6839\u636e\u7d22\u5f15\u627elist\u4e2d\u5143\u7d20"},"content":{"rendered":"<p style=\"text-align:center;\" ><img decoding=\"async\" src=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2024\/12\/d3ca6243-497e-42b7-9808-ab0197423b6e.webp?x-oss-process=image\/auto-orient,1\/format,webp\" alt=\"python\u5982\u4f55\u6839\u636e\u7d22\u5f15\u627elist\u4e2d\u5143\u7d20\" \/><\/p>\n<p><p> <strong>\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u7d22\u5f15\u6765\u67e5\u627e\u5217\u8868\uff08list\uff09\u4e2d\u7684\u5143\u7d20\u3002<\/strong> \u5e38\u7528\u7684\u65b9\u6cd5\u5305\u62ec\uff1a\u4f7f\u7528\u65b9\u62ec\u53f7\u8bbf\u95ee\u3001\u4f7f\u7528\u5217\u8868\u7684\u5185\u7f6e\u65b9\u6cd5\u3001\u5faa\u73af\u904d\u5386\u5217\u8868\u7b49\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u5e76\u63d0\u4f9b\u4e00\u4e9b\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n<\/p>\n<p><h2>\u4e00\u3001\u4f7f\u7528\u65b9\u62ec\u53f7\u8bbf\u95ee\u5217\u8868\u5143\u7d20<\/h2>\n<\/p>\n<p><p>Python \u4e2d\u6700\u76f4\u63a5\u7684\u65b9\u6cd5\u662f\u4f7f\u7528\u65b9\u62ec\u53f7<code>[]<\/code>\u6765\u6839\u636e\u7d22\u5f15\u8bbf\u95ee\u5217\u8868\u5143\u7d20\u3002\u7d22\u5f15\u4ece0\u5f00\u59cb\uff0c\u5373\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u7d22\u5f15\u662f0\uff0c\u7b2c\u4e8c\u4e2a\u5143\u7d20\u662f1\uff0c\u4ee5\u6b64\u7c7b\u63a8\u3002\u8d1f\u7d22\u5f15\u8868\u793a\u4ece\u5217\u8868\u672b\u5c3e\u5f00\u59cb\u8ba1\u6570\uff0c\u4f8b\u5982-1\u8868\u793a\u6700\u540e\u4e00\u4e2a\u5143\u7d20\u3002<\/p>\n<\/p>\n<p><h3>\u793a\u4f8b\u4ee3\u7801\uff1a<\/h3>\n<\/p>\n<p><pre><code class=\"language-python\">my_list = [10, 20, 30, 40, 50]<\/p>\n<h2><strong>\u8bbf\u95ee\u7b2c\u4e00\u4e2a\u5143\u7d20<\/strong><\/h2>\n<p>print(my_list[0])  # \u8f93\u51fa\uff1a10<\/p>\n<h2><strong>\u8bbf\u95ee\u7b2c\u4e09\u4e2a\u5143\u7d20<\/strong><\/h2>\n<p>print(my_list[2])  # \u8f93\u51fa\uff1a30<\/p>\n<h2><strong>\u8bbf\u95ee\u6700\u540e\u4e00\u4e2a\u5143\u7d20<\/strong><\/h2>\n<p>print(my_list[-1])  # \u8f93\u51fa\uff1a50<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h2>\u4e8c\u3001\u4f7f\u7528\u5217\u8868\u5185\u7f6e\u65b9\u6cd5\u83b7\u53d6\u5143\u7d20<\/h2>\n<\/p>\n<p><p>Python \u5217\u8868\u6709\u4e00\u4e9b\u5185\u7f6e\u65b9\u6cd5\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u67e5\u627e\u548c\u64cd\u4f5c\u5143\u7d20\u3002\u4f8b\u5982\uff0c<code>index()<\/code>\u65b9\u6cd5\u53ef\u4ee5\u6839\u636e\u5143\u7d20\u7684\u503c\u8fd4\u56de\u5176\u7d22\u5f15\uff0c\u7136\u540e\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e2a\u7d22\u5f15\u6765\u8bbf\u95ee\u5143\u7d20\u3002<\/p>\n<\/p>\n<p><h3>\u793a\u4f8b\u4ee3\u7801\uff1a<\/h3>\n<\/p>\n<p><pre><code class=\"language-python\">my_list = [10, 20, 30, 40, 50]<\/p>\n<h2><strong>\u67e5\u627e\u5143\u7d2020\u7684\u7d22\u5f15<\/strong><\/h2>\n<p>index = my_list.index(20)<\/p>\n<h2><strong>\u6839\u636e\u7d22\u5f15\u8bbf\u95ee\u5143\u7d20<\/strong><\/h2>\n<p>print(my_list[index])  # \u8f93\u51fa\uff1a20<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h2>\u4e09\u3001\u4f7f\u7528\u5faa\u73af\u904d\u5386\u5217\u8868<\/h2>\n<\/p>\n<p><p>\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u53ef\u80fd\u9700\u8981\u904d\u5386\u6574\u4e2a\u5217\u8868\u6765\u67e5\u627e\u7279\u5b9a\u6761\u4ef6\u4e0b\u7684\u5143\u7d20\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528<code>for<\/code>\u5faa\u73af\u6216<code>while<\/code>\u5faa\u73af\u6765\u904d\u5386\u5217\u8868\uff0c\u5e76\u6839\u636e\u7d22\u5f15\u8fdb\u884c\u76f8\u5e94\u64cd\u4f5c\u3002<\/p>\n<\/p>\n<p><h3>\u793a\u4f8b\u4ee3\u7801\uff1a<\/h3>\n<\/p>\n<p><pre><code class=\"language-python\">my_list = [10, 20, 30, 40, 50]<\/p>\n<h2><strong>\u4f7f\u7528for\u5faa\u73af\u904d\u5386\u5217\u8868<\/strong><\/h2>\n<p>for index in range(len(my_list)):<\/p>\n<p>    print(f&quot;\u7d22\u5f15 {index} \u5bf9\u5e94\u7684\u5143\u7d20\u662f {my_list[index]}&quot;)<\/p>\n<h2><strong>\u4f7f\u7528while\u5faa\u73af\u904d\u5386\u5217\u8868<\/strong><\/h2>\n<p>index = 0<\/p>\n<p>while index &lt; len(my_list):<\/p>\n<p>    print(f&quot;\u7d22\u5f15 {index} \u5bf9\u5e94\u7684\u5143\u7d20\u662f {my_list[index]}&quot;)<\/p>\n<p>    index += 1<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h2>\u56db\u3001\u7ed3\u5408\u6761\u4ef6\u8fdb\u884c\u590d\u6742\u67e5\u627e<\/h2>\n<\/p>\n<p><p>\u6709\u65f6\uff0c\u6211\u4eec\u53ef\u80fd\u9700\u8981\u6839\u636e\u66f4\u590d\u6742\u7684\u6761\u4ef6\u6765\u67e5\u627e\u5217\u8868\u4e2d\u7684\u5143\u7d20\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u7ed3\u5408\u6761\u4ef6\u8bed\u53e5\u4e0e\u5faa\u73af\u6765\u5b9e\u73b0\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u67e5\u627e\u6ee1\u8db3\u7279\u5b9a\u6761\u4ef6\u7684\u6240\u6709\u5143\u7d20\u53ca\u5176\u7d22\u5f15\u3002<\/p>\n<\/p>\n<p><h3>\u793a\u4f8b\u4ee3\u7801\uff1a<\/h3>\n<\/p>\n<p><pre><code class=\"language-python\">my_list = [10, 20, 30, 40, 50]<\/p>\n<h2><strong>\u67e5\u627e\u6240\u6709\u5927\u4e8e25\u7684\u5143\u7d20\u53ca\u5176\u7d22\u5f15<\/strong><\/h2>\n<p>for index, value in enumerate(my_list):<\/p>\n<p>    if value &gt; 25:<\/p>\n<p>        print(f&quot;\u7d22\u5f15 {index} \u5bf9\u5e94\u7684\u5143\u7d20\u662f {value}&quot;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h2>\u4e94\u3001\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\u8fdb\u884c\u67e5\u627e<\/h2>\n<\/p>\n<p><p>\u5217\u8868\u63a8\u5bfc\u5f0f\u662f\u4e00\u79cd\u7b80\u6d01\u7684\u65b9\u5f0f\uff0c\u53ef\u4ee5\u7528\u6765\u521b\u5efa\u65b0\u7684\u5217\u8868\u6216\u67e5\u627e\u6ee1\u8db3\u7279\u5b9a\u6761\u4ef6\u7684\u5143\u7d20\u3002\u5c3d\u7ba1\u4e3b\u8981\u7528\u4e8e\u751f\u6210\u65b0\u5217\u8868\uff0c\u4f46\u4e5f\u53ef\u4ee5\u7528\u6765\u67e5\u627e\u5143\u7d20\u3002<\/p>\n<\/p>\n<p><h3>\u793a\u4f8b\u4ee3\u7801\uff1a<\/h3>\n<\/p>\n<p><pre><code class=\"language-python\">my_list = [10, 20, 30, 40, 50]<\/p>\n<h2><strong>\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\u67e5\u627e\u6240\u6709\u5927\u4e8e25\u7684\u5143\u7d20\u53ca\u5176\u7d22\u5f15<\/strong><\/h2>\n<p>elements = [(index, value) for index, value in enumerate(my_list) if value &gt; 25]<\/p>\n<p>print(elements)  # \u8f93\u51fa\uff1a[(2, 30), (3, 40), (4, 50)]<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h2>\u516d\u3001\u5904\u7406\u7d22\u5f15\u8d85\u51fa\u8303\u56f4\u7684\u60c5\u51b5<\/h2>\n<\/p>\n<p><p>\u5728\u8bbf\u95ee\u5217\u8868\u5143\u7d20\u65f6\uff0c\u5982\u679c\u7d22\u5f15\u8d85\u51fa\u8303\u56f4\uff0c\u4f1a\u5f15\u53d1<code>IndexError<\/code>\u3002\u56e0\u6b64\uff0c\u5904\u7406\u8fd9\u79cd\u60c5\u51b5\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u53ef\u4ee5\u4f7f\u7528<code>try-except<\/code>\u5757\u6765\u6355\u83b7\u548c\u5904\u7406\u8fd9\u79cd\u9519\u8bef\u3002<\/p>\n<\/p>\n<p><h3>\u793a\u4f8b\u4ee3\u7801\uff1a<\/h3>\n<\/p>\n<p><pre><code class=\"language-python\">my_list = [10, 20, 30, 40, 50]<\/p>\n<p>index = 10<\/p>\n<p>try:<\/p>\n<p>    print(my_list[index])<\/p>\n<p>except IndexError:<\/p>\n<p>    print(f&quot;\u7d22\u5f15 {index} \u8d85\u51fa\u4e86\u5217\u8868\u8303\u56f4&quot;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u901a\u8fc7\u4e0a\u8ff0\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6839\u636e\u7d22\u5f15\u5728Python\u5217\u8868\u4e2d\u67e5\u627e\u5143\u7d20\u3002\u65e0\u8bba\u662f\u7b80\u5355\u7684\u76f4\u63a5\u8bbf\u95ee\uff0c\u8fd8\u662f\u590d\u6742\u7684\u6761\u4ef6\u67e5\u627e\uff0c\u8fd9\u4e9b\u65b9\u6cd5\u90fd\u80fd\u63d0\u4f9b\u5f3a\u5927\u7684\u652f\u6301\uff0c\u6ee1\u8db3\u5404\u79cd\u5b9e\u9645\u9700\u6c42\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p> <strong>\u5982\u4f55\u5728Python\u4e2d\u6839\u636e\u7d22\u5f15\u8bbf\u95ee\u5217\u8868\u4e2d\u7684\u5143\u7d20\uff1f<\/strong><br \/>\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u7b80\u5355\u7684\u65b9\u62ec\u53f7\u8bed\u6cd5\u8bbf\u95ee\u5217\u8868\u4e2d\u7684\u5143\u7d20\u3002\u5047\u8bbe\u6709\u4e00\u4e2a\u5217\u8868 <code>my_list = [10, 20, 30, 40, 50]<\/code>\uff0c\u8981\u83b7\u53d6\u7d22\u5f15\u4e3a2\u7684\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>my_list[2]<\/code>\uff0c\u8fd9\u5c06\u8fd4\u56de30\u3002\u8bf7\u6ce8\u610f\uff0cPython\u7684\u7d22\u5f15\u662f\u4ece0\u5f00\u59cb\u7684\uff0c\u56e0\u6b64\u7b2c\u4e00\u4e2a\u5143\u7d20\u7684\u7d22\u5f15\u662f0\u3002<\/p>\n<p><strong>\u5982\u679c\u7d22\u5f15\u8d85\u51fa\u4e86\u5217\u8868\u7684\u8303\u56f4\uff0c\u4f1a\u53d1\u751f\u4ec0\u4e48\uff1f<\/strong><br \/>\u5f53\u4f60\u5c1d\u8bd5\u8bbf\u95ee\u5217\u8868\u4e2d\u4e0d\u5b58\u5728\u7684\u7d22\u5f15\u65f6\uff0cPython\u4f1a\u629b\u51fa <code>IndexError<\/code>\u3002\u4f8b\u5982\uff0c\u82e5\u5217\u8868\u7684\u957f\u5ea6\u4e3a5\uff0c\u8bbf\u95ee\u7d22\u5f155\u6216\u66f4\u5927\uff08\u5982 <code>my_list[5]<\/code>\uff09\u5c06\u5f15\u53d1\u9519\u8bef\u3002\u4e3a\u4e86\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\uff0c\u53ef\u4ee5\u4f7f\u7528\u6761\u4ef6\u8bed\u53e5\u68c0\u67e5\u7d22\u5f15\u662f\u5426\u5728\u5217\u8868\u7684\u6709\u6548\u8303\u56f4\u5185\u3002<\/p>\n<p><strong>\u5982\u4f55\u6839\u636e\u8d1f\u7d22\u5f15\u8bbf\u95ee\u5217\u8868\u5143\u7d20\uff1f<\/strong><br \/>\u8d1f\u7d22\u5f15\u5728Python\u4e2d\u8868\u793a\u4ece\u5217\u8868\u672b\u5c3e\u5f00\u59cb\u7684\u7d22\u5f15\u3002\u4f8b\u5982\uff0c<code>my_list[-1]<\/code>\u5c06\u8fd4\u56de\u5217\u8868\u7684\u6700\u540e\u4e00\u4e2a\u5143\u7d20\uff0c<code>my_list[-2]<\/code>\u5c06\u8fd4\u56de\u5012\u6570\u7b2c\u4e8c\u4e2a\u5143\u7d20\u3002\u8fd9\u79cd\u65b9\u5f0f\u5728\u5904\u7406\u5217\u8868\u7684\u5c3e\u90e8\u5143\u7d20\u65f6\u975e\u5e38\u65b9\u4fbf\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u7d22\u5f15\u6765\u67e5\u627e\u5217\u8868\uff08list\uff09\u4e2d\u7684\u5143\u7d20\u3002 \u5e38\u7528\u7684\u65b9\u6cd5\u5305\u62ec\uff1a\u4f7f\u7528\u65b9\u62ec\u53f7\u8bbf\u95ee\u3001\u4f7f\u7528\u5217\u8868\u7684\u5185\u7f6e [&hellip;]","protected":false},"author":3,"featured_media":1048283,"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\/1048273"}],"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=1048273"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1048273\/revisions"}],"predecessor-version":[{"id":1048289,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1048273\/revisions\/1048289"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1048283"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1048273"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1048273"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1048273"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}