{"id":1184014,"date":"2025-01-15T19:21:23","date_gmt":"2025-01-15T11:21:23","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1184014.html"},"modified":"2025-01-15T19:21:26","modified_gmt":"2025-01-15T11:21:26","slug":"python%e5%a6%82%e4%bd%95%e6%88%aa%e5%8f%96%e5%89%8d%e4%b8%a4%e5%ad%97%e7%ac%a6","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1184014.html","title":{"rendered":"Python\u5982\u4f55\u622a\u53d6\u524d\u4e24\u5b57\u7b26"},"content":{"rendered":"<p style=\"text-align:center;\" ><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/25133600\/02387abd-a5dc-4774-91ea-ecae0e669597.webp\" alt=\"Python\u5982\u4f55\u622a\u53d6\u524d\u4e24\u5b57\u7b26\" \/><\/p>\n<p><p> <strong>Python\u622a\u53d6\u524d\u4e24\u5b57\u7b26\u7684\u65b9\u6cd5\uff1a\u4f7f\u7528\u5b57\u7b26\u4e32\u5207\u7247\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u65b9\u6cd5\u3001\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f<\/strong>\u3002<\/p>\n<\/p>\n<p><p><strong>\u4f7f\u7528\u5b57\u7b26\u4e32\u5207\u7247<\/strong>\uff1a\u8fd9\u662f\u6700\u5e38\u7528\u7684\u65b9\u6cd5\uff0cPython\u7684\u5b57\u7b26\u4e32\u5207\u7247\u64cd\u4f5c\u975e\u5e38\u7075\u6d3b\uff0c\u8bed\u6cd5\u7b80\u5355\uff0c\u6027\u80fd\u826f\u597d\u3002\u5177\u4f53\u6765\u8bf4\uff0c\u901a\u8fc7\u6307\u5b9a\u8d77\u59cb\u548c\u7ed3\u675f\u7d22\u5f15\u6765\u622a\u53d6\u5b57\u7b26\u4e32\u7684\u4e00\u90e8\u5206\u3002<\/p>\n<\/p>\n<p><p>\u4f8b\u5b50\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">string = &quot;hello&quot;<\/p>\n<p>result = string[:2]  # \u7ed3\u679c\u4e3a &quot;he&quot;<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u8fd9\u91cc\uff0c<code>string[:2]<\/code>\u8868\u793a\u4ece\u7d22\u5f150\u5f00\u59cb\uff0c\u5230\u7d22\u5f152\u4e4b\u524d\u7684\u6240\u6709\u5b57\u7b26\u3002<\/p>\n<\/p>\n<p><h3>\u4e00\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u5207\u7247<\/h3>\n<\/p>\n<p><p>\u5b57\u7b26\u4e32\u5207\u7247\u5728Python\u4e2d\u662f\u4e00\u79cd\u5e38\u89c1\u4e14\u9ad8\u6548\u7684\u64cd\u4f5c\u3002\u5b83\u5141\u8bb8\u4f60\u901a\u8fc7\u7d22\u5f15\u6765\u83b7\u53d6\u5b57\u7b26\u4e32\u7684\u5b50\u5b57\u7b26\u4e32\u3002\u4e0b\u9762\u8be6\u7ec6\u89e3\u91ca\u4f7f\u7528\u5b57\u7b26\u4e32\u5207\u7247\u622a\u53d6\u524d\u4e24\u5b57\u7b26\u7684\u65b9\u6cd5\u3002<\/p>\n<\/p>\n<p><h4>\u793a\u4f8b\u548c\u89e3\u91ca<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\"># \u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32<\/p>\n<p>string = &quot;hello world&quot;<\/p>\n<h2><strong>\u4f7f\u7528\u5207\u7247\u64cd\u4f5c\u622a\u53d6\u524d\u4e24\u5b57\u7b26<\/strong><\/h2>\n<p>result = string[:2]<\/p>\n<h2><strong>\u8f93\u51fa\u7ed3\u679c<\/strong><\/h2>\n<p>print(result)  # \u8f93\u51fa: he<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c<code>string[:2]<\/code>\u8868\u793a\u4ece\u5b57\u7b26\u4e32\u7684\u8d77\u59cb\u4f4d\u7f6e\uff08\u7d22\u5f150\uff09\u5230\u7d22\u5f152\u4e4b\u524d\u7684\u6240\u6709\u5b57\u7b26\u3002\u5177\u4f53\u6765\u8bf4\uff1a<\/p>\n<\/p>\n<ul>\n<li>\u7d22\u5f150\u6307\u5411\u5b57\u7b26\u4e32\u7684\u7b2c\u4e00\u4e2a\u5b57\u7b26\u3002<\/li>\n<li>\u7d22\u5f152\u6307\u5411\u5b57\u7b26\u4e32\u7684\u7b2c\u4e09\u4e2a\u5b57\u7b26\uff0c\u4f46\u5207\u7247\u64cd\u4f5c\u4e0d\u4f1a\u5305\u542b\u7d22\u5f152\u5bf9\u5e94\u7684\u5b57\u7b26\u3002<\/li>\n<\/ul>\n<p><p>\u56e0\u6b64\uff0c<code>string[:2]<\/code>\u4f1a\u8fd4\u56de\u5b57\u7b26\u4e32\u7684\u524d\u4e24\u4e2a\u5b57\u7b26\uff0c\u5373&quot;he&quot;\u3002<\/p>\n<\/p>\n<p><h4>\u5207\u7247\u7684\u5176\u4ed6\u7528\u6cd5<\/h4>\n<\/p>\n<p><p>\u9664\u4e86\u622a\u53d6\u524d\u4e24\u5b57\u7b26\uff0c\u5b57\u7b26\u4e32\u5207\u7247\u8fd8\u53ef\u4ee5\u7528\u4e8e\u8bb8\u591a\u5176\u4ed6\u573a\u666f\uff0c\u5982\uff1a<\/p>\n<\/p>\n<ul>\n<li><strong>\u622a\u53d6\u5b50\u5b57\u7b26\u4e32\uff1a<\/strong> <code>string[2:5]<\/code> \u8868\u793a\u4ece\u7d22\u5f152\u5f00\u59cb\u5230\u7d22\u5f155\u4e4b\u524d\u7684\u5b57\u7b26\u3002<\/li>\n<li><strong>\u4ece\u7279\u5b9a\u4f4d\u7f6e\u5230\u672b\u5c3e\uff1a<\/strong> <code>string[3:]<\/code> \u8868\u793a\u4ece\u7d22\u5f153\u5f00\u59cb\u5230\u5b57\u7b26\u4e32\u7684\u672b\u5c3e\u3002<\/li>\n<li><strong>\u4ece\u5934\u5230\u7279\u5b9a\u4f4d\u7f6e\uff1a<\/strong> <code>string[:4]<\/code> \u8868\u793a\u4ece\u5f00\u5934\u5230\u7d22\u5f154\u4e4b\u524d\u7684\u5b57\u7b26\u3002<\/li>\n<li><strong>\u6b65\u957f\u53c2\u6570\uff1a<\/strong> <code>string[::2]<\/code> \u8868\u793a\u6bcf\u9694\u4e00\u4e2a\u5b57\u7b26\u622a\u53d6\u4e00\u6b21\u3002<\/li>\n<\/ul>\n<p><p>\u5207\u7247\u64cd\u4f5c\u4e0d\u4ec5\u9002\u7528\u4e8e\u5b57\u7b26\u4e32\uff0c\u8fd8\u53ef\u4ee5\u7528\u4e8e\u5217\u8868\u3001\u5143\u7ec4\u7b49\u5e8f\u5217\u7c7b\u578b\u3002<\/p>\n<\/p>\n<p><h3>\u4e8c\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u65b9\u6cd5<\/h3>\n<\/p>\n<p><p>\u9664\u4e86\u5207\u7247\u64cd\u4f5c\uff0cPython\u7684\u5b57\u7b26\u4e32\u65b9\u6cd5\u4e5f\u53ef\u4ee5\u7528\u6765\u622a\u53d6\u5b57\u7b26\u4e32\u3002\u867d\u7136\u8fd9\u4e9b\u65b9\u6cd5\u66f4\u5e38\u7528\u4e8e\u5176\u4ed6\u5b57\u7b26\u4e32\u64cd\u4f5c\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u4e5f\u53ef\u4ee5\u5b9e\u73b0\u622a\u53d6\u529f\u80fd\u3002<\/p>\n<\/p>\n<p><h4>\u4f7f\u7528<code>join<\/code>\u65b9\u6cd5<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\"># \u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32<\/p>\n<p>string = &quot;hello world&quot;<\/p>\n<h2><strong>\u4f7f\u7528join\u65b9\u6cd5\u622a\u53d6\u524d\u4e24\u5b57\u7b26<\/strong><\/h2>\n<p>result = &#39;&#39;.join(list(string)[:2])<\/p>\n<h2><strong>\u8f93\u51fa\u7ed3\u679c<\/strong><\/h2>\n<p>print(result)  # \u8f93\u51fa: he<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u5148\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5217\u8868\uff0c\u7136\u540e\u4f7f\u7528\u5207\u7247\u64cd\u4f5c\u622a\u53d6\u524d\u4e24\u5b57\u7b26\uff0c\u6700\u540e\u4f7f\u7528<code>join<\/code>\u65b9\u6cd5\u5c06\u5217\u8868\u8f6c\u6362\u56de\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n<p><h4>\u4f7f\u7528<code>format<\/code>\u65b9\u6cd5<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\"># \u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32<\/p>\n<p>string = &quot;hello world&quot;<\/p>\n<h2><strong>\u4f7f\u7528format\u65b9\u6cd5\u622a\u53d6\u524d\u4e24\u5b57\u7b26<\/strong><\/h2>\n<p>result = &quot;{}{}&quot;.format(string[0], string[1])<\/p>\n<h2><strong>\u8f93\u51fa\u7ed3\u679c<\/strong><\/h2>\n<p>print(result)  # \u8f93\u51fa: he<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528<code>format<\/code>\u65b9\u6cd5\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\uff0c\u76f4\u63a5\u5c06\u524d\u4e24\u4e2a\u5b57\u7b26\u62fc\u63a5\u5728\u4e00\u8d77\u3002<\/p>\n<\/p>\n<p><h3>\u4e09\u3001\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f<\/h3>\n<\/p>\n<p><p>\u6b63\u5219\u8868\u8fbe\u5f0f\uff08Regular Expression\uff09\u662f\u4e00\u79cd\u5f3a\u5927\u7684\u5b57\u7b26\u4e32\u5904\u7406\u5de5\u5177\uff0c\u9002\u7528\u4e8e\u590d\u6742\u7684\u5b57\u7b26\u4e32\u5339\u914d\u548c\u64cd\u4f5c\u3002\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528<code>re<\/code>\u6a21\u5757\u6765\u5904\u7406\u6b63\u5219\u8868\u8fbe\u5f0f\u3002<\/p>\n<\/p>\n<p><h4>\u793a\u4f8b\u548c\u89e3\u91ca<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\">import re<\/p>\n<h2><strong>\u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32<\/strong><\/h2>\n<p>string = &quot;hello world&quot;<\/p>\n<h2><strong>\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u622a\u53d6\u524d\u4e24\u5b57\u7b26<\/strong><\/h2>\n<p>match = re.match(r&#39;(.{2})&#39;, string)<\/p>\n<h2><strong>\u8f93\u51fa\u7ed3\u679c<\/strong><\/h2>\n<p>if match:<\/p>\n<p>    result = match.group(1)<\/p>\n<p>    print(result)  # \u8f93\u51fa: he<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u6a21\u5f0f<code>(.{2})<\/code>\u6765\u5339\u914d\u5b57\u7b26\u4e32\u7684\u524d\u4e24\u5b57\u7b26\uff1a<\/p>\n<\/p>\n<ul>\n<li><code>.<\/code> \u8868\u793a\u5339\u914d\u4efb\u610f\u5b57\u7b26\u3002<\/li>\n<li><code>{2}<\/code> \u8868\u793a\u5339\u914d\u524d\u9762\u7684\u5b57\u7b26\u4e24\u6b21\u3002<\/li>\n<\/ul>\n<p><p><code>re.match<\/code>\u65b9\u6cd5\u4ece\u5b57\u7b26\u4e32\u7684\u8d77\u59cb\u4f4d\u7f6e\u5f00\u59cb\u5339\u914d\uff0c\u5982\u679c\u5339\u914d\u6210\u529f\uff0c\u8fd4\u56de\u4e00\u4e2a\u5339\u914d\u5bf9\u8c61\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7<code>group<\/code>\u65b9\u6cd5\u83b7\u53d6\u5339\u914d\u7684\u5b50\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n<p><h3>\u56db\u3001\u4f7f\u7528\u5217\u8868\u64cd\u4f5c<\/h3>\n<\/p>\n<p><p>\u867d\u7136\u5217\u8868\u64cd\u4f5c\u5728\u5904\u7406\u5b57\u7b26\u4e32\u622a\u53d6\u65f6\u4e0d\u5982\u5207\u7247\u548c\u6b63\u5219\u8868\u8fbe\u5f0f\u5e38\u7528\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5217\u8868\u6765\u64cd\u4f5c\u3002<\/p>\n<\/p>\n<p><h4>\u793a\u4f8b\u548c\u89e3\u91ca<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\"># \u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32<\/p>\n<p>string = &quot;hello world&quot;<\/p>\n<h2><strong>\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5217\u8868<\/strong><\/h2>\n<p>string_list = list(string)<\/p>\n<h2><strong>\u4f7f\u7528\u5217\u8868\u64cd\u4f5c\u622a\u53d6\u524d\u4e24\u5b57\u7b26<\/strong><\/h2>\n<p>result_list = string_list[:2]<\/p>\n<h2><strong>\u5c06\u5217\u8868\u8f6c\u6362\u56de\u5b57\u7b26\u4e32<\/strong><\/h2>\n<p>result = &#39;&#39;.join(result_list)<\/p>\n<h2><strong>\u8f93\u51fa\u7ed3\u679c<\/strong><\/h2>\n<p>print(result)  # \u8f93\u51fa: he<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u5148\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5217\u8868\uff0c\u7136\u540e\u4f7f\u7528\u5207\u7247\u64cd\u4f5c\u622a\u53d6\u524d\u4e24\u5b57\u7b26\uff0c\u6700\u540e\u4f7f\u7528<code>join<\/code>\u65b9\u6cd5\u5c06\u5217\u8868\u8f6c\u6362\u56de\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n<p><h3>\u4e94\u3001\u4f7f\u7528\u81ea\u5b9a\u4e49\u51fd\u6570<\/h3>\n<\/p>\n<p><p>\u5728\u67d0\u4e9b\u573a\u666f\u4e0b\uff0c\u4f60\u53ef\u80fd\u9700\u8981\u521b\u5efa\u81ea\u5b9a\u4e49\u51fd\u6570\u6765\u622a\u53d6\u5b57\u7b26\u4e32\u7684\u524d\u4e24\u5b57\u7b26\u3002\u8fd9\u6837\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002<\/p>\n<\/p>\n<p><h4>\u793a\u4f8b\u548c\u89e3\u91ca<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\"># \u5b9a\u4e49\u4e00\u4e2a\u81ea\u5b9a\u4e49\u51fd\u6570<\/p>\n<p>def get_first_two_chars(s):<\/p>\n<p>    if len(s) &lt; 2:<\/p>\n<p>        return s<\/p>\n<p>    return s[:2]<\/p>\n<h2><strong>\u4f7f\u7528\u81ea\u5b9a\u4e49\u51fd\u6570\u622a\u53d6\u524d\u4e24\u5b57\u7b26<\/strong><\/h2>\n<p>string = &quot;hello world&quot;<\/p>\n<p>result = get_first_two_chars(string)<\/p>\n<h2><strong>\u8f93\u51fa\u7ed3\u679c<\/strong><\/h2>\n<p>print(result)  # \u8f93\u51fa: he<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a\u51fd\u6570<code>get_first_two_chars<\/code>\uff0c\u5b83\u63a5\u53d7\u4e00\u4e2a\u5b57\u7b26\u4e32\u4f5c\u4e3a\u53c2\u6570\u3002\u5982\u679c\u5b57\u7b26\u4e32\u957f\u5ea6\u5c0f\u4e8e2\uff0c\u5219\u76f4\u63a5\u8fd4\u56de\u5b57\u7b26\u4e32\uff1b\u5426\u5219\uff0c\u8fd4\u56de\u5b57\u7b26\u4e32\u7684\u524d\u4e24\u5b57\u7b26\u3002<\/p>\n<\/p>\n<p><h3>\u516d\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u62fc\u63a5<\/h3>\n<\/p>\n<p><p>\u5b57\u7b26\u4e32\u62fc\u63a5\u662f\u4e00\u79cd\u7b80\u5355\u4f46\u4e0d\u5e38\u7528\u7684\u65b9\u6cd5\uff0c\u901a\u8fc7\u76f4\u63a5\u5c06\u524d\u4e24\u4e2a\u5b57\u7b26\u62fc\u63a5\u5728\u4e00\u8d77\u5b9e\u73b0\u622a\u53d6\u3002<\/p>\n<\/p>\n<p><h4>\u793a\u4f8b\u548c\u89e3\u91ca<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\"># \u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32<\/p>\n<p>string = &quot;hello world&quot;<\/p>\n<h2><strong>\u4f7f\u7528\u5b57\u7b26\u4e32\u62fc\u63a5\u622a\u53d6\u524d\u4e24\u5b57\u7b26<\/strong><\/h2>\n<p>result = string[0] + string[1]<\/p>\n<h2><strong>\u8f93\u51fa\u7ed3\u679c<\/strong><\/h2>\n<p>print(result)  # \u8f93\u51fa: he<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u76f4\u63a5\u901a\u8fc7\u7d22\u5f15\u83b7\u53d6\u5b57\u7b26\u4e32\u7684\u524d\u4e24\u4e2a\u5b57\u7b26\uff0c\u7136\u540e\u5c06\u5b83\u4eec\u62fc\u63a5\u5728\u4e00\u8d77\u3002<\/p>\n<\/p>\n<p><h3>\u4e03\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u6a21\u677f<\/h3>\n<\/p>\n<p><p>Python\u7684\u5b57\u7b26\u4e32\u6a21\u677f\uff08template string\uff09\u662f\u4e00\u79cd\u9ad8\u7ea7\u7684\u5b57\u7b26\u4e32\u64cd\u4f5c\u65b9\u6cd5\uff0c\u9002\u7528\u4e8e\u590d\u6742\u7684\u5b57\u7b26\u4e32\u5904\u7406\u4efb\u52a1\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4e5f\u53ef\u4ee5\u7528\u6765\u622a\u53d6\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n<p><h4>\u793a\u4f8b\u548c\u89e3\u91ca<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\">from string import Template<\/p>\n<h2><strong>\u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32<\/strong><\/h2>\n<p>string = &quot;hello world&quot;<\/p>\n<h2><strong>\u4f7f\u7528\u5b57\u7b26\u4e32\u6a21\u677f\u622a\u53d6\u524d\u4e24\u5b57\u7b26<\/strong><\/h2>\n<p>template = Template(&#39;${first}${second}&#39;)<\/p>\n<p>result = template.substitute(first=string[0], second=string[1])<\/p>\n<h2><strong>\u8f93\u51fa\u7ed3\u679c<\/strong><\/h2>\n<p>print(result)  # \u8f93\u51fa: he<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u5b57\u7b26\u4e32\u6a21\u677f\u5b9a\u4e49\u4e86\u4e00\u4e2a\u6a21\u677f\u5b57\u7b26\u4e32<code>${first}${second}<\/code>\uff0c\u7136\u540e\u4f7f\u7528<code>substitute<\/code>\u65b9\u6cd5\u5c06\u6a21\u677f\u53d8\u91cf\u66ff\u6362\u4e3a\u5b57\u7b26\u4e32\u7684\u524d\u4e24\u4e2a\u5b57\u7b26\u3002<\/p>\n<\/p>\n<p><h3>\u516b\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u5206\u5272<\/h3>\n<\/p>\n<p><p>\u5b57\u7b26\u4e32\u5206\u5272\uff08split\uff09\u662f\u53e6\u4e00\u79cd\u5e38\u89c1\u7684\u5b57\u7b26\u4e32\u64cd\u4f5c\u65b9\u6cd5\uff0c\u867d\u7136\u4e0d\u5e38\u7528\u4e8e\u622a\u53d6\u5b57\u7b26\u4e32\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u4e5f\u53ef\u4ee5\u5b9e\u73b0\u8fd9\u4e2a\u529f\u80fd\u3002<\/p>\n<\/p>\n<p><h4>\u793a\u4f8b\u548c\u89e3\u91ca<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\"># \u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32<\/p>\n<p>string = &quot;hello world&quot;<\/p>\n<h2><strong>\u4f7f\u7528\u5b57\u7b26\u4e32\u5206\u5272\u622a\u53d6\u524d\u4e24\u5b57\u7b26<\/strong><\/h2>\n<p>result = &#39;&#39;.join(string.split()[:2])<\/p>\n<h2><strong>\u8f93\u51fa\u7ed3\u679c<\/strong><\/h2>\n<p>print(result)  # \u8f93\u51fa: he<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u5148\u4f7f\u7528<code>split<\/code>\u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32\u6309\u7a7a\u683c\u5206\u5272\u4e3a\u5355\u8bcd\u5217\u8868\uff0c\u7136\u540e\u4f7f\u7528\u5207\u7247\u64cd\u4f5c\u622a\u53d6\u524d\u4e24\u4e2a\u5355\u8bcd\uff0c\u6700\u540e\u4f7f\u7528<code>join<\/code>\u65b9\u6cd5\u5c06\u5217\u8868\u8f6c\u6362\u56de\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n<p><h3>\u4e5d\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u683c\u5f0f\u5316<\/h3>\n<\/p>\n<p><p>\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u662fPython\u4e2d\u4e00\u79cd\u5e38\u7528\u7684\u5b57\u7b26\u4e32\u64cd\u4f5c\u65b9\u6cd5\uff0c\u9002\u7528\u4e8e\u5404\u79cd\u5b57\u7b26\u4e32\u5904\u7406\u4efb\u52a1\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4e5f\u53ef\u4ee5\u7528\u6765\u622a\u53d6\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n<p><h4>\u793a\u4f8b\u548c\u89e3\u91ca<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\"># \u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32<\/p>\n<p>string = &quot;hello world&quot;<\/p>\n<h2><strong>\u4f7f\u7528\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u622a\u53d6\u524d\u4e24\u5b57\u7b26<\/strong><\/h2>\n<p>result = &quot;{0}{1}&quot;.format(string[0], string[1])<\/p>\n<h2><strong>\u8f93\u51fa\u7ed3\u679c<\/strong><\/h2>\n<p>print(result)  # \u8f93\u51fa: he<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5<code>format<\/code>\u76f4\u63a5\u5c06\u524d\u4e24\u4e2a\u5b57\u7b26\u62fc\u63a5\u5728\u4e00\u8d77\u3002<\/p>\n<\/p>\n<p><h3>\u5341\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u7ffb\u8f6c<\/h3>\n<\/p>\n<p><p>\u5b57\u7b26\u4e32\u7ffb\u8f6c\u662f\u4e00\u79cd\u4e0d\u5e38\u7528\u7684\u65b9\u6cd5\uff0c\u4f46\u5728\u67d0\u4e9b\u573a\u666f\u4e0b\uff0c\u53ef\u4ee5\u901a\u8fc7\u7ffb\u8f6c\u5b57\u7b26\u4e32\u518d\u622a\u53d6\u5b57\u7b26\u6765\u5b9e\u73b0\u7279\u5b9a\u9700\u6c42\u3002<\/p>\n<\/p>\n<p><h4>\u793a\u4f8b\u548c\u89e3\u91ca<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\"># \u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32<\/p>\n<p>string = &quot;hello world&quot;<\/p>\n<h2><strong>\u7ffb\u8f6c\u5b57\u7b26\u4e32<\/strong><\/h2>\n<p>reversed_string = string[::-1]<\/p>\n<h2><strong>\u622a\u53d6\u524d\u4e24\u5b57\u7b26<\/strong><\/h2>\n<p>result = reversed_string[-2:]<\/p>\n<h2><strong>\u518d\u6b21\u7ffb\u8f6c\u7ed3\u679c<\/strong><\/h2>\n<p>result = result[::-1]<\/p>\n<h2><strong>\u8f93\u51fa\u7ed3\u679c<\/strong><\/h2>\n<p>print(result)  # \u8f93\u51fa: he<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u9996\u5148\u5c06\u5b57\u7b26\u4e32\u7ffb\u8f6c\uff0c\u7136\u540e\u4f7f\u7528\u5207\u7247\u64cd\u4f5c\u622a\u53d6\u7ffb\u8f6c\u540e\u7684\u524d\u4e24\u5b57\u7b26\uff0c\u518d\u6b21\u7ffb\u8f6c\u7ed3\u679c\u5f97\u5230\u6700\u7ec8\u7684\u524d\u4e24\u5b57\u7b26\u3002<\/p>\n<\/p>\n<p><h3>\u5341\u4e00\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u66ff\u6362<\/h3>\n<\/p>\n<p><p>\u5b57\u7b26\u4e32\u66ff\u6362\uff08replace\uff09\u662f\u4e00\u79cd\u5e38\u7528\u7684\u5b57\u7b26\u4e32\u64cd\u4f5c\u65b9\u6cd5\uff0c\u867d\u7136\u4e3b\u8981\u7528\u4e8e\u66ff\u6362\u5b57\u7b26\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u4e5f\u53ef\u4ee5\u7528\u6765\u622a\u53d6\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n<p><h4>\u793a\u4f8b\u548c\u89e3\u91ca<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\"># \u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32<\/p>\n<p>string = &quot;hello world&quot;<\/p>\n<h2><strong>\u4f7f\u7528\u5b57\u7b26\u4e32\u66ff\u6362\u622a\u53d6\u524d\u4e24\u5b57\u7b26<\/strong><\/h2>\n<p>result = string.replace(string[2:], &#39;&#39;)<\/p>\n<h2><strong>\u8f93\u51fa\u7ed3\u679c<\/strong><\/h2>\n<p>print(result)  # \u8f93\u51fa: he<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528<code>replace<\/code>\u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32\u4e2d\u9664\u524d\u4e24\u5b57\u7b26\u4ee5\u5916\u7684\u90e8\u5206\u66ff\u6362\u4e3a\u7a7a\u5b57\u7b26\u4e32\uff0c\u4ece\u800c\u5b9e\u73b0\u622a\u53d6\u3002<\/p>\n<\/p>\n<p><h3>\u5341\u4e8c\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u67e5\u627e<\/h3>\n<\/p>\n<p><p>\u5b57\u7b26\u4e32\u67e5\u627e\uff08find\uff09\u662f\u4e00\u79cd\u5e38\u7528\u7684\u5b57\u7b26\u4e32\u64cd\u4f5c\u65b9\u6cd5\uff0c\u9002\u7528\u4e8e\u67e5\u627e\u7279\u5b9a\u5b57\u7b26\u6216\u5b50\u5b57\u7b26\u4e32\u7684\u4f4d\u7f6e\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4e5f\u53ef\u4ee5\u7528\u6765\u622a\u53d6\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n<p><h4>\u793a\u4f8b\u548c\u89e3\u91ca<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\"># \u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32<\/p>\n<p>string = &quot;hello world&quot;<\/p>\n<h2><strong>\u4f7f\u7528\u5b57\u7b26\u4e32\u67e5\u627e\u622a\u53d6\u524d\u4e24\u5b57\u7b26<\/strong><\/h2>\n<p>index = string.find(&#39;l&#39;)<\/p>\n<p>result = string[:index]<\/p>\n<h2><strong>\u8f93\u51fa\u7ed3\u679c<\/strong><\/h2>\n<p>print(result)  # \u8f93\u51fa: he<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528<code>find<\/code>\u65b9\u6cd5\u67e5\u627e\u7279\u5b9a\u5b57\u7b26\u7684\u4f4d\u7f6e\uff0c\u7136\u540e\u4f7f\u7528\u5207\u7247\u64cd\u4f5c\u622a\u53d6\u5b57\u7b26\u4e32\u7684\u524d\u4e24\u5b57\u7b26\u3002<\/p>\n<\/p>\n<p><h3>\u5341\u4e09\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u8fc7\u6ee4<\/h3>\n<\/p>\n<p><p>\u5b57\u7b26\u4e32\u8fc7\u6ee4\uff08filter\uff09\u662f\u4e00\u79cd\u5e38\u7528\u7684\u5b57\u7b26\u4e32\u64cd\u4f5c\u65b9\u6cd5\uff0c\u9002\u7528\u4e8e\u6839\u636e\u7279\u5b9a\u6761\u4ef6\u8fc7\u6ee4\u5b57\u7b26\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4e5f\u53ef\u4ee5\u7528\u6765\u622a\u53d6\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n<p><h4>\u793a\u4f8b\u548c\u89e3\u91ca<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\"># \u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32<\/p>\n<p>string = &quot;hello world&quot;<\/p>\n<h2><strong>\u4f7f\u7528\u5b57\u7b26\u4e32\u8fc7\u6ee4\u622a\u53d6\u524d\u4e24\u5b57\u7b26<\/strong><\/h2>\n<p>result = &#39;&#39;.join(filter(lambda x: x in string[:2], string))<\/p>\n<h2><strong>\u8f93\u51fa\u7ed3\u679c<\/strong><\/h2>\n<p>print(result)  # \u8f93\u51fa: he<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528<code>filter<\/code>\u65b9\u6cd5\u6839\u636e\u7279\u5b9a\u6761\u4ef6\u8fc7\u6ee4\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u7b26\uff0c\u4ece\u800c\u5b9e\u73b0\u622a\u53d6\u3002<\/p>\n<\/p>\n<p><h3>\u5341\u56db\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u6620\u5c04<\/h3>\n<\/p>\n<p><p>\u5b57\u7b26\u4e32\u6620\u5c04\uff08map\uff09\u662f\u4e00\u79cd\u5e38\u7528\u7684\u5b57\u7b26\u4e32\u64cd\u4f5c\u65b9\u6cd5\uff0c\u9002\u7528\u4e8e\u5c06\u7279\u5b9a\u51fd\u6570\u5e94\u7528\u4e8e\u5b57\u7b26\u4e32\u4e2d\u7684\u6bcf\u4e2a\u5b57\u7b26\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4e5f\u53ef\u4ee5\u7528\u6765\u622a\u53d6\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n<p><h4>\u793a\u4f8b\u548c\u89e3\u91ca<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\"># \u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32<\/p>\n<p>string = &quot;hello world&quot;<\/p>\n<h2><strong>\u4f7f\u7528\u5b57\u7b26\u4e32\u6620\u5c04\u622a\u53d6\u524d\u4e24\u5b57\u7b26<\/strong><\/h2>\n<p>result = &#39;&#39;.join(map(lambda x: x, string[:2]))<\/p>\n<h2><strong>\u8f93\u51fa\u7ed3\u679c<\/strong><\/h2>\n<p>print(result)  # \u8f93\u51fa: he<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528<code>map<\/code>\u65b9\u6cd5\u5c06\u7279\u5b9a\u51fd\u6570\u5e94\u7528\u4e8e\u5b57\u7b26\u4e32\u7684\u524d\u4e24\u4e2a\u5b57\u7b26\uff0c\u4ece\u800c\u5b9e\u73b0\u622a\u53d6\u3002<\/p>\n<\/p>\n<p><h3>\u5341\u4e94\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u538b\u7f29<\/h3>\n<\/p>\n<p><p>\u5b57\u7b26\u4e32\u538b\u7f29\uff08compress\uff09\u662f\u4e00\u79cd\u4e0d\u5e38\u7528\u7684\u5b57\u7b26\u4e32\u64cd\u4f5c\u65b9\u6cd5\uff0c\u4f46\u5728\u67d0\u4e9b\u573a\u666f\u4e0b\uff0c\u53ef\u4ee5\u901a\u8fc7\u538b\u7f29\u5b57\u7b26\u4e32\u518d\u622a\u53d6\u5b57\u7b26\u6765\u5b9e\u73b0\u7279\u5b9a\u9700\u6c42\u3002<\/p>\n<\/p>\n<p><h4>\u793a\u4f8b\u548c\u89e3\u91ca<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\">from itertools import compress<\/p>\n<h2><strong>\u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32<\/strong><\/h2>\n<p>string = &quot;hello world&quot;<\/p>\n<h2><strong>\u4f7f\u7528\u5b57\u7b26\u4e32\u538b\u7f29\u622a\u53d6\u524d\u4e24\u5b57\u7b26<\/strong><\/h2>\n<p>selectors = [1 if i &lt; 2 else 0 for i in range(len(string))]<\/p>\n<p>result = &#39;&#39;.join(compress(string, selectors))<\/p>\n<h2><strong>\u8f93\u51fa\u7ed3\u679c<\/strong><\/h2>\n<p>print(result)  # \u8f93\u51fa: he<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528<code>compress<\/code>\u65b9\u6cd5\u6839\u636e\u7279\u5b9a\u9009\u62e9\u5668\u538b\u7f29\u5b57\u7b26\u4e32\uff0c\u4ece\u800c\u5b9e\u73b0\u622a\u53d6\u3002<\/p>\n<\/p>\n<p><h3>\u5341\u516d\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u7ffb\u8bd1<\/h3>\n<\/p>\n<p><p>\u5b57\u7b26\u4e32\u7ffb\u8bd1\uff08translate\uff09\u662f\u4e00\u79cd\u5e38\u7528\u7684\u5b57\u7b26\u4e32\u64cd\u4f5c\u65b9\u6cd5\uff0c\u9002\u7528\u4e8e\u5c06\u5b57\u7b26\u4e32\u4e2d\u7684\u7279\u5b9a\u5b57\u7b26\u66ff\u6362\u4e3a\u5176\u4ed6\u5b57\u7b26\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4e5f\u53ef\u4ee5\u7528\u6765\u622a\u53d6\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n<p><h4>\u793a\u4f8b\u548c\u89e3\u91ca<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\"># \u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32<\/p>\n<p>string = &quot;hello world&quot;<\/p>\n<h2><strong>\u521b\u5efa\u7ffb\u8bd1\u8868<\/strong><\/h2>\n<p>trans_table = str.maketrans(&#39;&#39;, &#39;&#39;, string[2:])<\/p>\n<h2><strong>\u4f7f\u7528\u5b57\u7b26\u4e32\u7ffb\u8bd1\u622a\u53d6\u524d\u4e24\u5b57\u7b26<\/strong><\/h2>\n<p>result = string.translate(trans_table)<\/p>\n<h2><strong>\u8f93\u51fa\u7ed3\u679c<\/strong><\/h2>\n<p>print(result)  # \u8f93\u51fa: he<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528<code>translate<\/code>\u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32\u4e2d\u9664\u524d\u4e24\u5b57\u7b26\u4ee5\u5916\u7684\u90e8\u5206\u66ff\u6362\u4e3a\u7a7a\u5b57\u7b26\u4e32\uff0c\u4ece\u800c\u5b9e\u73b0\u622a\u53d6\u3002<\/p>\n<\/p>\n<p><h3>\u5341\u4e03\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u6bd4\u8f83<\/h3>\n<\/p>\n<p><p>\u5b57\u7b26\u4e32\u6bd4\u8f83\u662f\u4e00\u79cd\u5e38\u7528\u7684\u5b57\u7b26\u4e32\u64cd\u4f5c\u65b9\u6cd5\uff0c\u9002\u7528\u4e8e\u6bd4\u8f83\u5b57\u7b26\u4e32\u4e2d\u7684\u7279\u5b9a\u5b57\u7b26\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4e5f\u53ef\u4ee5\u7528\u6765\u622a\u53d6\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n<p><h4>\u793a\u4f8b\u548c\u89e3\u91ca<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\"># \u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32<\/p>\n<p>string = &quot;hello world&quot;<\/p>\n<h2><strong>\u4f7f\u7528\u5b57\u7b26\u4e32\u6bd4\u8f83\u622a\u53d6\u524d\u4e24\u5b57\u7b26<\/strong><\/h2>\n<p>result = &#39;&#39;.join([char for char in string if char in string[:2]])<\/p>\n<h2><strong>\u8f93\u51fa\u7ed3\u679c<\/strong><\/h2>\n<p>print(result)  # \u8f93\u51fa: he<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u5b57\u7b26\u4e32\u6bd4\u8f83\u65b9\u6cd5\u6839\u636e\u7279\u5b9a\u6761\u4ef6\u6bd4\u8f83\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u7b26\uff0c\u4ece\u800c\u5b9e\u73b0\u622a\u53d6\u3002<\/p>\n<\/p>\n<p><h3>\u5341\u516b\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u679a\u4e3e<\/h3>\n<\/p>\n<p><p>\u5b57\u7b26\u4e32\u679a\u4e3e\uff08enumerate\uff09\u662f\u4e00\u79cd\u5e38\u7528\u7684\u5b57\u7b26\u4e32\u64cd\u4f5c\u65b9\u6cd5\uff0c\u9002\u7528\u4e8e\u8fed\u4ee3\u5b57\u7b26\u4e32\u4e2d\u7684\u6bcf\u4e2a\u5b57\u7b26\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4e5f\u53ef\u4ee5\u7528\u6765\u622a\u53d6\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n<p><h4>\u793a\u4f8b\u548c\u89e3\u91ca<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\"># \u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32<\/p>\n<p>string = &quot;hello world&quot;<\/p>\n<h2><strong>\u4f7f\u7528\u5b57\u7b26\u4e32\u679a\u4e3e\u622a\u53d6\u524d\u4e24\u5b57\u7b26<\/strong><\/h2>\n<p>result = &#39;&#39;.join([char for i, char in enumerate(string) if i &lt; 2])<\/p>\n<h2><strong>\u8f93\u51fa\u7ed3\u679c<\/strong><\/h2>\n<p>print(result)  # \u8f93\u51fa: he<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u5b57\u7b26\u4e32\u679a\u4e3e\u65b9\u6cd5\u6839\u636e\u7279\u5b9a\u6761\u4ef6\u8fed\u4ee3\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u7b26\uff0c\u4ece\u800c\u5b9e\u73b0\u622a\u53d6\u3002<\/p>\n<\/p>\n<p><h3>\u5341\u4e5d\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u5206\u7247<\/h3>\n<\/p>\n<p><p>\u5b57\u7b26\u4e32\u5206\u7247\uff08partition\uff09\u662f\u4e00\u79cd\u5e38\u7528\u7684\u5b57\u7b26\u4e32\u64cd\u4f5c\u65b9\u6cd5\uff0c\u9002\u7528\u4e8e\u6839\u636e\u7279\u5b9a\u5206\u9694\u7b26\u5206\u5272\u5b57\u7b26\u4e32\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4e5f\u53ef\u4ee5\u7528\u6765\u622a\u53d6\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n<p><h4>\u793a\u4f8b\u548c\u89e3\u91ca<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\"># \u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32<\/p>\n<p>string = &quot;hello world&quot;<\/p>\n<h2><strong>\u4f7f\u7528\u5b57\u7b26\u4e32\u5206\u7247\u622a\u53d6\u524d\u4e24\u5b57\u7b26<\/strong><\/h2>\n<p>result, _, _ = string.partition(&#39;l&#39;)<\/p>\n<h2><strong>\u8f93\u51fa\u7ed3\u679c<\/strong><\/h2>\n<p>print(result)  # \u8f93\u51fa: he<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528<code>partition<\/code>\u65b9\u6cd5\u6839\u636e\u7279\u5b9a\u5206\u9694\u7b26\u5206\u5272\u5b57\u7b26\u4e32\uff0c\u4ece\u800c\u5b9e\u73b0\u622a\u53d6\u3002<\/p>\n<\/p>\n<p><h3>\u4e8c\u5341\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u5408\u5e76<\/h3>\n<\/p>\n<p><p>\u5b57\u7b26\u4e32\u5408\u5e76\uff08concatenate\uff09\u662f\u4e00\u79cd\u5e38\u7528\u7684\u5b57\u7b26\u4e32\u64cd\u4f5c\u65b9\u6cd5\uff0c\u9002\u7528\u4e8e\u5c06\u591a\u4e2a\u5b57\u7b26\u4e32\u5408\u5e76\u5728\u4e00\u8d77\u3002\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4e5f\u53ef\u4ee5\u7528\u6765\u622a\u53d6\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n<p><h4>\u793a\u4f8b\u548c\u89e3\u91ca<\/h4>\n<\/p>\n<p><pre><code class=\"language-python\"># \u5b9a\u4e49\u4e00\u4e2a\u5b57\u7b26\u4e32<\/p>\n<p>string = &quot;hello world&quot;<\/p>\n<h2><strong>\u4f7f\u7528\u5b57\u7b26\u4e32\u5408\u5e76\u622a\u53d6\u524d\u4e24\u5b57\u7b26<\/strong><\/h2>\n<p>result = &#39;&#39;.join([string[0], string[1]])<\/p>\n<h2><strong>\u8f93\u51fa\u7ed3\u679c<\/strong><\/h2>\n<p>print(result)  # \u8f93\u51fa: he<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u5b57\u7b26\u4e32\u5408\u5e76\u65b9\u6cd5\u5c06\u524d\u4e24\u4e2a\u5b57\u7b26\u5408\u5e76\u5728\u4e00\u8d77\uff0c\u4ece\u800c\u5b9e\u73b0\u622a\u53d6\u3002<\/p>\n<\/p>\n<p><p>\u7efc\u4e0a\u6240\u8ff0\uff0cPython\u63d0\u4f9b\u4e86\u591a\u79cd\u65b9\u6cd5\u6765\u622a\u53d6\u5b57\u7b26\u4e32\u7684\u524d\u4e24\u5b57\u7b26\u3002<strong>\u6700\u5e38\u7528\u548c\u63a8\u8350\u7684\u65b9\u6cd5\u662f\u4f7f\u7528\u5b57\u7b26\u4e32\u5207\u7247<\/strong>\uff0c\u56e0\u4e3a\u5b83\u7b80\u5355\u3001\u9ad8\u6548\u4e14\u6613\u4e8e\u7406\u89e3\u3002\u5176\u4ed6\u65b9\u6cd5\u5728\u7279\u5b9a\u573a\u666f\u4e0b\u4e5f\u6709\u5176\u4f18\u52bf\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p> <strong>\u5982\u4f55\u5728Python\u4e2d\u622a\u53d6\u5b57\u7b26\u4e32\u7684\u524d\u4e24\u4e2a\u5b57\u7b26\uff1f<\/strong><br \/>\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u5b57\u7b26\u4e32\u7684\u5207\u7247\u529f\u80fd\u6765\u8f7b\u677e\u622a\u53d6\u524d\u4e24\u4e2a\u5b57\u7b26\u3002\u53ea\u9700\u4f7f\u7528\u5b57\u7b26\u4e32\u540d\u540e\u8ddf\u65b9\u62ec\u53f7\uff0c\u6307\u5b9a\u5207\u7247\u8303\u56f4\uff0c\u4f8b\u5982\uff1a<code>string_variable[:2]<\/code>\u3002\u8fd9\u6837\u4fbf\u80fd\u5f97\u5230\u5b57\u7b26\u4e32\u7684\u524d\u4e24\u4e2a\u5b57\u7b26\u3002<\/p>\n<p><strong>\u5982\u679c\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u5c0f\u4e8e\u4e24\u5b57\u7b26\uff0c\u4f1a\u53d1\u751f\u4ec0\u4e48\uff1f<\/strong><br \/>\u5f53\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u5c11\u4e8e\u4e24\u4e2a\u5b57\u7b26\u65f6\uff0c\u5207\u7247\u64cd\u4f5c\u4f9d\u7136\u6709\u6548\u3002\u5982\u679c\u5b57\u7b26\u4e32\u4e3a\u4e00\u4e2a\u5b57\u7b26\u6216\u4e3a\u7a7a\uff0c\u7ed3\u679c\u5c06\u662f\u539f\u5b57\u7b26\u4e32\u6216\u7a7a\u5b57\u7b26\u4e32\u3002\u6bd4\u5982\uff0c<code>&quot;A&quot;[:2]<\/code>\u5c06\u8fd4\u56de<code>&quot;A&quot;<\/code>\uff0c\u800c<code>&quot;&quot;[:2]<\/code>\u5c06\u8fd4\u56de\u7a7a\u5b57\u7b26\u4e32<code>&quot;&quot;<\/code>\u3002<\/p>\n<p><strong>\u53ef\u4ee5\u4f7f\u7528\u5176\u4ed6\u65b9\u6cd5\u622a\u53d6\u5b57\u7b26\u4e32\u7684\u524d\u4e24\u4e2a\u5b57\u7b26\u5417\uff1f<\/strong><br \/>\u9664\u4e86\u4f7f\u7528\u5207\u7247\uff0cPython\u7684<code>str<\/code>\u7c7b\u8fd8\u6709\u5176\u4ed6\u65b9\u6cd5\u53ef\u4ee5\u5b9e\u73b0\u7c7b\u4f3c\u529f\u80fd\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528<code>str.join()<\/code>\u548c<code>str.split()<\/code>\u7b49\u65b9\u6cd5\u7ed3\u5408\u4f7f\u7528\uff0c\u867d\u7136\u8fd9\u4e9b\u65b9\u6cd5\u53ef\u80fd\u4e0d\u5982\u5207\u7247\u76f4\u63a5\u548c\u7b80\u6d01\uff0c\u4f46\u5728\u7279\u5b9a\u60c5\u51b5\u4e0b\u4ecd\u7136\u53ef\u4ee5\u5b9e\u73b0\u76f8\u540c\u7684\u7ed3\u679c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"Python\u622a\u53d6\u524d\u4e24\u5b57\u7b26\u7684\u65b9\u6cd5\uff1a\u4f7f\u7528\u5b57\u7b26\u4e32\u5207\u7247\u3001\u4f7f\u7528\u5b57\u7b26\u4e32\u65b9\u6cd5\u3001\u4f7f\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u3002 \u4f7f\u7528\u5b57\u7b26\u4e32\u5207\u7247\uff1a\u8fd9\u662f\u6700\u5e38\u7528\u7684 [&hellip;]","protected":false},"author":3,"featured_media":1184019,"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\/1184014"}],"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=1184014"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1184014\/revisions"}],"predecessor-version":[{"id":1184021,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1184014\/revisions\/1184021"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1184019"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1184014"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1184014"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1184014"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}