{"id":1081956,"date":"2025-01-08T12:44:21","date_gmt":"2025-01-08T04:44:21","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1081956.html"},"modified":"2025-01-08T12:44:25","modified_gmt":"2025-01-08T04:44:25","slug":"%e5%a6%82%e4%bd%95%e7%bb%99%e5%ad%97%e7%ac%a6%e4%b8%b2%e5%8e%bb%e9%87%8dpython-2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1081956.html","title":{"rendered":"\u5982\u4f55\u7ed9\u5b57\u7b26\u4e32\u53bb\u91cdpython"},"content":{"rendered":"<p style=\"text-align:center;\" ><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/24183723\/daf3a5a2-c588-47c3-a201-cdfa0544c63d.webp\" alt=\"\u5982\u4f55\u7ed9\u5b57\u7b26\u4e32\u53bb\u91cdpython\" \/><\/p>\n<p><p> <strong>\u5982\u4f55\u7ed9\u5b57\u7b26\u4e32\u53bb\u91cdpython<\/strong><\/p>\n<\/p>\n<p><p>\u8981\u7ed9\u5b57\u7b26\u4e32\u53bb\u91cd\uff0c\u53ef\u4ee5\u4f7f\u7528\u591a\u79cd\u65b9\u6cd5\uff0c\u5305\u62ec\u96c6\u5408\uff08set\uff09\u3001\u6709\u5e8f\u5b57\u5178\uff08OrderedDict\uff09\u548c\u5217\u8868\u63a8\u5bfc\u5f0f\u7b49\u3002<strong>\u4f7f\u7528\u96c6\u5408\u3001\u4f7f\u7528OrderedDict\u3001\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f<\/strong>\uff0c\u8fd9\u4e9b\u65b9\u6cd5\u5404\u6709\u4f18\u52a3\u3002\u4e0b\u9762\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5176\u4e2d\u4e00\u79cd\u65b9\u6cd5\u5e76\u9010\u4e00\u5c55\u5f00\u3002<\/p>\n<\/p>\n<p><p><strong>\u4f7f\u7528\u96c6\u5408<\/strong>\uff1a\u96c6\u5408\u662fPython\u4e2d\u7684\u4e00\u79cd\u6570\u636e\u7ed3\u6784\uff0c\u96c6\u5408\u4e2d\u7684\u5143\u7d20\u662f\u552f\u4e00\u7684\uff0c\u8fd9\u4f7f\u5f97\u5b83\u975e\u5e38\u9002\u5408\u7528\u4e8e\u53bb\u91cd\u64cd\u4f5c\u3002\u4f7f\u7528\u96c6\u5408\u53bb\u91cd\u7684\u57fa\u672c\u65b9\u6cd5\u662f\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u96c6\u5408\uff0c\u7136\u540e\u518d\u5c06\u5176\u8f6c\u6362\u56de\u5b57\u7b26\u4e32\u3002\u8fd9\u79cd\u65b9\u6cd5\u7b80\u5355\u9ad8\u6548\uff0c\u4f46\u4f1a\u6253\u4e71\u5b57\u7b26\u4e32\u7684\u987a\u5e8f\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">def remove_duplicates(s):<\/p>\n<p>    return &#39;&#39;.join(set(s))<\/p>\n<p>s = &quot;hello world&quot;<\/p>\n<p>print(remove_duplicates(s))  # \u8f93\u51fa\u53ef\u80fd\u662f &quot;helo wrd&quot; \u6216\u5176\u4ed6\u987a\u5e8f<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u4e00\u3001\u4f7f\u7528\u96c6\u5408\u53bb\u91cd<\/h3>\n<\/p>\n<p><p>\u96c6\u5408\uff08Set\uff09\u662f\u4e00\u79cd\u65e0\u5e8f\u7684\u6570\u636e\u7ed3\u6784\uff0c\u96c6\u5408\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u90fd\u662f\u552f\u4e00\u7684\u3002\u901a\u8fc7\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u96c6\u5408\uff0c\u53ef\u4ee5\u8f7b\u677e\u5730\u5220\u9664\u91cd\u590d\u5b57\u7b26\u3002\u7136\u800c\uff0c\u96c6\u5408\u4e0d\u4fdd\u7559\u5143\u7d20\u7684\u987a\u5e8f\uff0c\u6240\u4ee5\u5b57\u7b26\u4e32\u7684\u987a\u5e8f\u53ef\u80fd\u4f1a\u6539\u53d8\u3002<\/p>\n<\/p>\n<p><h4>1.1 \u4f7f\u7528\u96c6\u5408\u53bb\u91cd\u7684\u4ee3\u7801\u793a\u4f8b<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\">def remove_duplicates_using_set(s):<\/p>\n<p>    return &#39;&#39;.join(set(s))<\/p>\n<p>s = &quot;hello world&quot;<\/p>\n<p>print(remove_duplicates_using_set(s))  # \u8f93\u51fa\u53ef\u80fd\u662f &quot;helo wrd&quot; \u6216\u5176\u4ed6\u987a\u5e8f<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>1.2 \u4f7f\u7528\u96c6\u5408\u53bb\u91cd\u7684\u4f18\u7f3a\u70b9<\/h4>\n<\/p>\n<p><p><strong>\u4f18\u70b9<\/strong>\uff1a<\/p>\n<\/p>\n<ul>\n<li>\u7b80\u5355\u6613\u7528\uff1a\u4ee3\u7801\u7b80\u6d01\u660e\u4e86\uff0c\u6613\u4e8e\u7406\u89e3\u3002<\/li>\n<li>\u9ad8\u6548\uff1a\u96c6\u5408\u7684\u67e5\u627e\u548c\u63d2\u5165\u64cd\u4f5c\u5e73\u5747\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(1)\u3002<\/li>\n<\/ul>\n<p><p><strong>\u7f3a\u70b9<\/strong>\uff1a<\/p>\n<\/p>\n<ul>\n<li>\u65e0\u5e8f\uff1a\u96c6\u5408\u4e0d\u4fdd\u7559\u5143\u7d20\u7684\u987a\u5e8f\uff0c\u56e0\u6b64\u539f\u5b57\u7b26\u4e32\u7684\u987a\u5e8f\u53ef\u80fd\u4f1a\u6539\u53d8\u3002\u5982\u679c\u987a\u5e8f\u5f88\u91cd\u8981\uff0c\u8fd9\u79cd\u65b9\u6cd5\u53ef\u80fd\u4e0d\u9002\u7528\u3002<\/li>\n<\/ul>\n<p><h3>\u4e8c\u3001\u4f7f\u7528OrderedDict\u53bb\u91cd<\/h3>\n<\/p>\n<p><p>\u5982\u679c\u9700\u8981\u4fdd\u7559\u5b57\u7b26\u4e32\u4e2d\u5b57\u7b26\u7684\u987a\u5e8f\uff0c\u53ef\u4ee5\u4f7f\u7528<code>collections.OrderedDict<\/code>\u3002<code>OrderedDict<\/code>\u662f\u4e00\u4e2a\u6709\u5e8f\u5b57\u5178\uff0c\u5b83\u6309\u63d2\u5165\u987a\u5e8f\u4fdd\u5b58\u952e\u503c\u5bf9\u3002<\/p>\n<\/p>\n<p><h4>2.1 \u4f7f\u7528OrderedDict\u53bb\u91cd\u7684\u4ee3\u7801\u793a\u4f8b<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\">from collections import OrderedDict<\/p>\n<p>def remove_duplicates_using_ordered_dict(s):<\/p>\n<p>    return &#39;&#39;.join(OrderedDict.fromkeys(s))<\/p>\n<p>s = &quot;hello world&quot;<\/p>\n<p>print(remove_duplicates_using_ordered_dict(s))  # \u8f93\u51fa &quot;helo wrd&quot;<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>2.2 \u4f7f\u7528OrderedDict\u53bb\u91cd\u7684\u4f18\u7f3a\u70b9<\/h4>\n<\/p>\n<p><p><strong>\u4f18\u70b9<\/strong>\uff1a<\/p>\n<\/p>\n<ul>\n<li>\u4fdd\u7559\u987a\u5e8f\uff1a<code>OrderedDict<\/code>\u6309\u63d2\u5165\u987a\u5e8f\u4fdd\u5b58\u952e\u503c\u5bf9\uff0c\u56e0\u6b64\u539f\u5b57\u7b26\u4e32\u7684\u987a\u5e8f\u4e0d\u4f1a\u6539\u53d8\u3002<\/li>\n<li>\u7b80\u5355\uff1a\u4ee3\u7801\u4f9d\u7136\u7b80\u6d01\uff0c\u6613\u4e8e\u7406\u89e3\u3002<\/li>\n<\/ul>\n<p><p><strong>\u7f3a\u70b9<\/strong>\uff1a<\/p>\n<\/p>\n<ul>\n<li>\u6027\u80fd\uff1a<code>OrderedDict<\/code>\u7684\u63d2\u5165\u64cd\u4f5c\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(1)\uff0c\u4f46\u603b\u4f53\u6027\u80fd\u53ef\u80fd\u7a0d\u900a\u4e8e\u96c6\u5408\u3002<\/li>\n<\/ul>\n<p><h3>\u4e09\u3001\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\u53bb\u91cd<\/h3>\n<\/p>\n<p><p>\u5217\u8868\u63a8\u5bfc\u5f0f\u662f\u4e00\u79cd\u7b80\u6d01\u7684\u65b9\u5f0f\u6765\u521b\u5efa\u5217\u8868\u3002\u901a\u8fc7\u7ed3\u5408\u5217\u8868\u63a8\u5bfc\u5f0f\u548c\u96c6\u5408\uff0c\u53ef\u4ee5\u9ad8\u6548\u5730\u53bb\u9664\u91cd\u590d\u5b57\u7b26\u5e76\u4fdd\u7559\u987a\u5e8f\u3002<\/p>\n<\/p>\n<p><h4>3.1 \u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\u53bb\u91cd\u7684\u4ee3\u7801\u793a\u4f8b<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\">def remove_duplicates_using_list_comprehension(s):<\/p>\n<p>    seen = set()<\/p>\n<p>    return &#39;&#39;.join([char for char in s if not (char in seen or seen.add(char))])<\/p>\n<p>s = &quot;hello world&quot;<\/p>\n<p>print(remove_duplicates_using_list_comprehension(s))  # \u8f93\u51fa &quot;helo wrd&quot;<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>3.2 \u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\u53bb\u91cd\u7684\u4f18\u7f3a\u70b9<\/h4>\n<\/p>\n<p><p><strong>\u4f18\u70b9<\/strong>\uff1a<\/p>\n<\/p>\n<ul>\n<li>\u4fdd\u7559\u987a\u5e8f\uff1a\u5217\u8868\u63a8\u5bfc\u5f0f\u548c\u96c6\u5408\u7ed3\u5408\uff0c\u53ef\u4ee5\u4fdd\u7559\u5b57\u7b26\u4e32\u7684\u987a\u5e8f\u3002<\/li>\n<li>\u9ad8\u6548\uff1a\u5c3d\u7ba1\u4ee3\u7801\u7a0d\u590d\u6742\uff0c\u4f46\u6027\u80fd\u8f83\u597d\u3002<\/li>\n<\/ul>\n<p><p><strong>\u7f3a\u70b9<\/strong>\uff1a<\/p>\n<\/p>\n<ul>\n<li>\u590d\u6742\uff1a\u4ee3\u7801\u76f8\u5bf9\u590d\u6742\uff0c\u53ef\u80fd\u4e0d\u5982\u524d\u4e24\u79cd\u65b9\u6cd5\u6613\u4e8e\u7406\u89e3\u3002<\/li>\n<\/ul>\n<p><h3>\u56db\u3001\u4f7f\u7528\u5faa\u73af\u548c\u6761\u4ef6\u8bed\u53e5\u53bb\u91cd<\/h3>\n<\/p>\n<p><p>\u9664\u4e86\u4e0a\u8ff0\u65b9\u6cd5\uff0c\u8fd8\u53ef\u4ee5\u4f7f\u7528\u5faa\u73af\u548c\u6761\u4ef6\u8bed\u53e5\u624b\u52a8\u53bb\u91cd\u3002\u8fd9\u79cd\u65b9\u6cd5\u5c3d\u7ba1\u4ee3\u7801\u8f83\u957f\uff0c\u4f46\u66f4\u76f4\u89c2\uff0c\u9002\u5408\u521d\u5b66\u8005\u7406\u89e3\u53bb\u91cd\u7684\u8fc7\u7a0b\u3002<\/p>\n<\/p>\n<p><h4>4.1 \u4f7f\u7528\u5faa\u73af\u548c\u6761\u4ef6\u8bed\u53e5\u53bb\u91cd\u7684\u4ee3\u7801\u793a\u4f8b<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\">def remove_duplicates_using_loop(s):<\/p>\n<p>    result = &quot;&quot;<\/p>\n<p>    for char in s:<\/p>\n<p>        if char not in result:<\/p>\n<p>            result += char<\/p>\n<p>    return result<\/p>\n<p>s = &quot;hello world&quot;<\/p>\n<p>print(remove_duplicates_using_loop(s))  # \u8f93\u51fa &quot;helo wrd&quot;<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>4.2 \u4f7f\u7528\u5faa\u73af\u548c\u6761\u4ef6\u8bed\u53e5\u53bb\u91cd\u7684\u4f18\u7f3a\u70b9<\/h4>\n<\/p>\n<p><p><strong>\u4f18\u70b9<\/strong>\uff1a<\/p>\n<\/p>\n<ul>\n<li>\u76f4\u89c2\uff1a\u4ee3\u7801\u76f4\u89c2\uff0c\u6613\u4e8e\u7406\u89e3\u53bb\u91cd\u7684\u8fc7\u7a0b\u3002<\/li>\n<li>\u4fdd\u7559\u987a\u5e8f\uff1a\u80fd\u591f\u4fdd\u7559\u5b57\u7b26\u4e32\u7684\u987a\u5e8f\u3002<\/li>\n<\/ul>\n<p><p><strong>\u7f3a\u70b9<\/strong>\uff1a<\/p>\n<\/p>\n<ul>\n<li>\u4f4e\u6548\uff1a\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(n^2)\uff0c\u5bf9\u4e8e\u957f\u5b57\u7b26\u4e32\u6027\u80fd\u8f83\u5dee\u3002<\/li>\n<\/ul>\n<p><h3>\u4e94\u3001\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u53bb\u91cd<\/h3>\n<\/p>\n<p><p>\u6b63\u5219\u8868\u8fbe\u5f0f\u662f\u5904\u7406\u5b57\u7b26\u4e32\u7684\u5f3a\u5927\u5de5\u5177\u3002\u5c3d\u7ba1\u6b63\u5219\u8868\u8fbe\u5f0f\u4e0d\u76f4\u63a5\u7528\u4e8e\u53bb\u91cd\uff0c\u4f46\u53ef\u4ee5\u7ed3\u5408\u5176\u4ed6\u65b9\u6cd5\u5b9e\u73b0\u53bb\u91cd\u3002<\/p>\n<\/p>\n<p><h4>5.1 \u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u53bb\u91cd\u7684\u4ee3\u7801\u793a\u4f8b<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\">import re<\/p>\n<p>def remove_duplicates_using_regex(s):<\/p>\n<p>    pattern = re.compile(r&#39;(.)(?=.*\\1)&#39;)<\/p>\n<p>    return pattern.sub(&#39;&#39;, s)<\/p>\n<p>s = &quot;hello world&quot;<\/p>\n<p>print(remove_duplicates_using_regex(s))  # \u8f93\u51fa &quot;helo wrd&quot;<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h4>5.2 \u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u53bb\u91cd\u7684\u4f18\u7f3a\u70b9<\/h4>\n<\/p>\n<p><p><strong>\u4f18\u70b9<\/strong>\uff1a<\/p>\n<\/p>\n<ul>\n<li>\u5f3a\u5927\uff1a\u6b63\u5219\u8868\u8fbe\u5f0f\u529f\u80fd\u5f3a\u5927\uff0c\u9002\u5408\u590d\u6742\u5b57\u7b26\u4e32\u5904\u7406\u3002<\/li>\n<\/ul>\n<p><p><strong>\u7f3a\u70b9<\/strong>\uff1a<\/p>\n<\/p>\n<ul>\n<li>\u590d\u6742\uff1a\u4ee3\u7801\u590d\u6742\uff0c\u96be\u4ee5\u7406\u89e3\u548c\u7ef4\u62a4\u3002<\/li>\n<li>\u6027\u80fd\uff1a\u6b63\u5219\u8868\u8fbe\u5f0f\u5904\u7406\u6027\u80fd\u53ef\u80fd\u4e0d\u5982\u5176\u4ed6\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n<p><h3>\u516d\u3001\u603b\u7ed3\u4e0e\u9009\u62e9<\/h3>\n<\/p>\n<p><p>\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u9009\u62e9\u54ea\u79cd\u65b9\u6cd5\u53bb\u91cd\u53d6\u51b3\u4e8e\u5177\u4f53\u9700\u6c42\u548c\u573a\u666f\u3002\u5982\u679c\u987a\u5e8f\u4e0d\u91cd\u8981\uff0c\u53ef\u4ee5\u9009\u62e9\u4f7f\u7528\u96c6\u5408\u53bb\u91cd\uff1b\u5982\u679c\u9700\u8981\u4fdd\u7559\u987a\u5e8f\uff0c\u53ef\u4ee5\u9009\u62e9\u4f7f\u7528<code>OrderedDict<\/code>\u6216\u5217\u8868\u63a8\u5bfc\u5f0f\u53bb\u91cd\u3002\u5bf9\u4e8e\u521d\u5b66\u8005\u6216\u6559\u5b66\u573a\u666f\uff0c\u53ef\u4ee5\u9009\u62e9\u4f7f\u7528\u5faa\u73af\u548c\u6761\u4ef6\u8bed\u53e5\u53bb\u91cd\uff0c\u4fbf\u4e8e\u7406\u89e3\u3002\u6b63\u5219\u8868\u8fbe\u5f0f\u9002\u5408\u5904\u7406\u590d\u6742\u5b57\u7b26\u4e32\uff0c\u4f46\u4e0d\u63a8\u8350\u7528\u4e8e\u7b80\u5355\u53bb\u91cd\u64cd\u4f5c\u3002<\/p>\n<\/p>\n<p><p>\u65e0\u8bba\u9009\u62e9\u54ea\u79cd\u65b9\u6cd5\uff0c\u90fd\u5e94\u6ce8\u610f\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u6027\u80fd\uff0c\u786e\u4fdd\u5728\u6ee1\u8db3\u9700\u6c42\u7684\u524d\u63d0\u4e0b\uff0c\u4ee3\u7801\u7b80\u5355\u9ad8\u6548\u3002\u901a\u8fc7\u5408\u7406\u9009\u62e9\u53bb\u91cd\u65b9\u6cd5\uff0c\u53ef\u4ee5\u63d0\u5347\u4ee3\u7801\u8d28\u91cf\u548c\u8fd0\u884c\u6548\u7387\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p> <strong>\u5982\u4f55\u5728Python\u4e2d\u9ad8\u6548\u5730\u53bb\u91cd\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u7b26\uff1f<\/strong><br \/>\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u96c6\u5408\uff08set\uff09\u6765\u9ad8\u6548\u5730\u53bb\u91cd\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u7b26\u3002\u96c6\u5408\u81ea\u52a8\u53bb\u9664\u91cd\u590d\u9879\uff0c\u56e0\u6b64\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u96c6\u5408\u540e\uff0c\u518d\u5c06\u5176\u8f6c\u56de\u5b57\u7b26\u4e32\u5373\u53ef\u5b9e\u73b0\u53bb\u91cd\u3002\u793a\u4f8b\u5982\u4e0b\uff1a  <\/p>\n<pre><code class=\"language-python\">input_string = &quot;hello&quot;\nunique_string = &#39;&#39;.join(set(input_string))\nprint(unique_string)\n<\/code><\/pre>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u96c6\u5408\u4e0d\u4f1a\u4fdd\u7559\u539f\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u7b26\u987a\u5e8f\u3002<\/p>\n<p><strong>\u53bb\u91cd\u5b57\u7b26\u4e32\u65f6\uff0c\u5982\u4f55\u4fdd\u6301\u5b57\u7b26\u7684\u539f\u59cb\u987a\u5e8f\uff1f<\/strong><br \/>\u5982\u679c\u5e0c\u671b\u5728\u53bb\u91cd\u5b57\u7b26\u4e32\u7684\u540c\u65f6\u4fdd\u7559\u5b57\u7b26\u7684\u539f\u59cb\u987a\u5e8f\uff0c\u53ef\u4ee5\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\u7ed3\u5408\u96c6\u5408\u3002\u8fd9\u6837\u53ef\u4ee5\u786e\u4fdd\u6dfb\u52a0\u5230\u7ed3\u679c\u4e2d\u7684\u5b57\u7b26\u662f\u552f\u4e00\u7684\uff0c\u5e76\u4e14\u987a\u5e8f\u4e0e\u539f\u59cb\u5b57\u7b26\u4e32\u4e00\u81f4\u3002\u4f8b\u5982\uff1a  <\/p>\n<pre><code class=\"language-python\">input_string = &quot;hello&quot;\nunique_string = &#39;&#39;.join(dict.fromkeys(input_string))\nprint(unique_string)\n<\/code><\/pre>\n<p>\u8fd9\u79cd\u65b9\u6cd5\u5229\u7528\u4e86\u5b57\u5178\u7684\u6709\u5e8f\u7279\u6027\u6765\u4fdd\u6301\u5b57\u7b26\u7684\u987a\u5e8f\u3002<\/p>\n<p><strong>\u5728Python\u4e2d\uff0c\u53bb\u91cd\u5b57\u7b26\u4e32\u65f6\u5982\u4f55\u5904\u7406\u5927\u5c0f\u5199\u654f\u611f\u95ee\u9898\uff1f<\/strong><br \/>\u5bf9\u4e8e\u5927\u5c0f\u5199\u654f\u611f\u7684\u53bb\u91cd\uff0c\u53ef\u4ee5\u9009\u62e9\u5728\u53bb\u91cd\u524d\u5c06\u5b57\u7b26\u4e32\u7edf\u4e00\u8f6c\u6362\u4e3a\u5c0f\u5199\u6216\u5927\u5199\uff0c\u8fd9\u6837\u53ef\u4ee5\u786e\u4fdd\u76f8\u540c\u5b57\u7b26\u7684\u4e0d\u540c\u5927\u5c0f\u5199\u5f62\u5f0f\u88ab\u89c6\u4e3a\u91cd\u590d\u3002\u4f8b\u5982\uff1a  <\/p>\n<pre><code class=\"language-python\">input_string = &quot;Hello&quot;\nunique_string = &#39;&#39;.join(dict.fromkeys(input_string.lower()))\nprint(unique_string)\n<\/code><\/pre>\n<p>\u8fd9\u6837\u5904\u7406\u540e\uff0c&quot;H&quot;\u548c&quot;h&quot;\u4f1a\u88ab\u89c6\u4e3a\u76f8\u540c\u5b57\u7b26\uff0c\u4ece\u800c\u53bb\u91cd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5982\u4f55\u7ed9\u5b57\u7b26\u4e32\u53bb\u91cdpython \u8981\u7ed9\u5b57\u7b26\u4e32\u53bb\u91cd\uff0c\u53ef\u4ee5\u4f7f\u7528\u591a\u79cd\u65b9\u6cd5\uff0c\u5305\u62ec\u96c6\u5408\uff08set\uff09\u3001\u6709\u5e8f\u5b57\u5178\uff08OrderedD [&hellip;]","protected":false},"author":3,"featured_media":1081967,"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\/1081956"}],"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=1081956"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1081956\/revisions"}],"predecessor-version":[{"id":1081968,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1081956\/revisions\/1081968"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1081967"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1081956"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1081956"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1081956"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}