{"id":979836,"date":"2024-12-27T06:49:42","date_gmt":"2024-12-26T22:49:42","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/979836.html"},"modified":"2024-12-27T06:49:44","modified_gmt":"2024-12-26T22:49:44","slug":"python%e4%b8%ad%e5%a6%82%e4%bd%95%e5%a4%b4%e5%b0%be%e5%af%b9%e8%b0%83","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/979836.html","title":{"rendered":"python\u4e2d\u5982\u4f55\u5934\u5c3e\u5bf9\u8c03"},"content":{"rendered":"<p style=\"text-align:center;\" ><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/24205511\/987c105c-15cf-4a5a-9a8d-153c9b994f2f.webp\" alt=\"python\u4e2d\u5982\u4f55\u5934\u5c3e\u5bf9\u8c03\" \/><\/p>\n<p><p> <strong>\u5728Python\u4e2d\uff0c\u5934\u5c3e\u5bf9\u8c03\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u5b9e\u73b0\uff0c\u5305\u62ec\u4f7f\u7528\u5207\u7247\u3001\u4ea4\u6362\u53d8\u91cf\u3001\u5217\u8868\u65b9\u6cd5\u7b49\u3002\u5177\u4f53\u65b9\u6cd5\u5305\u62ec\uff1a\u4f7f\u7528\u5207\u7247\u64cd\u4f5c\u5b9e\u73b0\u5bf9\u8c03\u3001\u5229\u7528\u5217\u8868\u7684append\u548cpop\u65b9\u6cd5\u3001\u901a\u8fc7\u53cc\u91cd\u8d4b\u503c\u4ea4\u6362\u5143\u7d20\u7b49\u3002<\/strong> \u5176\u4e2d\uff0c\u5207\u7247\u64cd\u4f5c\u662f\u4e00\u79cd\u975e\u5e38\u7b80\u4fbf\u7684\u65b9\u6cd5\uff0c\u9002\u7528\u4e8e\u5927\u591a\u6570\u53ef\u8fed\u4ee3\u5bf9\u8c61\u3002\u901a\u8fc7\u5c06\u5217\u8868\u5207\u7247\u5e76\u91cd\u65b0\u7ec4\u5408\uff0c\u4f60\u53ef\u4ee5\u8f7b\u677e\u5730\u5b9e\u73b0\u5934\u5c3e\u5143\u7d20\u7684\u5bf9\u8c03\u3002<\/p>\n<\/p>\n<p><h3>\u4e00\u3001\u5207\u7247\u64cd\u4f5c\u5b9e\u73b0\u5934\u5c3e\u5bf9\u8c03<\/h3>\n<\/p>\n<p><p>\u5207\u7247\u662fPython\u4e2d\u975e\u5e38\u5f3a\u5927\u7684\u4e00\u4e2a\u7279\u6027\uff0c\u5b83\u5141\u8bb8\u4f60\u5728\u4e0d\u6539\u53d8\u539f\u59cb\u5217\u8868\u7684\u60c5\u51b5\u4e0b\uff0c\u5bf9\u5217\u8868\u4e2d\u7684\u5143\u7d20\u8fdb\u884c\u91cd\u65b0\u6392\u5217\u3002\u5bf9\u4e8e\u5934\u5c3e\u5bf9\u8c03\uff0c\u5207\u7247\u64cd\u4f5c\u53ef\u4ee5\u5f88\u65b9\u4fbf\u5730\u5b9e\u73b0\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">def swap_ends_slice(lst):<\/p>\n<p>    if len(lst) &lt; 2:<\/p>\n<p>        return lst<\/p>\n<p>    return [lst[-1]] + lst[1:-1] + [lst[0]]<\/p>\n<h2><strong>\u793a\u4f8b<\/strong><\/h2>\n<p>my_list = [1, 2, 3, 4, 5]<\/p>\n<p>new_list = swap_ends_slice(my_list)<\/p>\n<p>print(new_list)  # \u8f93\u51fa: [5, 2, 3, 4, 1]<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u8fd9\u79cd\u65b9\u6cd5\u7684\u4f18\u52bf\u5728\u4e8e\uff0c\u5229\u7528\u5207\u7247\u64cd\u4f5c\u7684\u7b80\u6d01\u6027\u548c\u7075\u6d3b\u6027\uff0c\u53ef\u4ee5\u5feb\u901f\u5bf9\u5217\u8868\u8fdb\u884c\u5934\u5c3e\u5bf9\u8c03\u3002\u6b64\u5916\uff0c\u5207\u7247\u64cd\u4f5c\u4e0d\u4f1a\u4fee\u6539\u539f\u59cb\u5217\u8868\uff0c\u800c\u662f\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u5217\u8868\u3002<\/p>\n<\/p>\n<p><h3>\u4e8c\u3001\u4f7f\u7528\u5217\u8868\u65b9\u6cd5\u5b9e\u73b0\u5934\u5c3e\u5bf9\u8c03<\/h3>\n<\/p>\n<p><p>Python\u7684\u5217\u8868\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u76f4\u63a5\u7528\u4e8e\u5b9e\u73b0\u5934\u5c3e\u5bf9\u8c03\u3002\u901a\u8fc7\u4f7f\u7528\u5217\u8868\u7684 <code>append()<\/code> \u548c <code>pop()<\/code> \u65b9\u6cd5\uff0c\u53ef\u4ee5\u5b9e\u73b0\u5bf9\u5217\u8868\u5143\u7d20\u7684\u7075\u6d3b\u64cd\u4f5c\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">def swap_ends_methods(lst):<\/p>\n<p>    if len(lst) &lt; 2:<\/p>\n<p>        return lst<\/p>\n<p>    head = lst.pop(0)<\/p>\n<p>    t<a href=\"https:\/\/docs.pingcode.com\/blog\/59162.html\" target=\"_blank\">AI<\/a>l = lst.pop(-1)<\/p>\n<p>    lst.insert(0, tail)<\/p>\n<p>    lst.append(head)<\/p>\n<p>    return lst<\/p>\n<h2><strong>\u793a\u4f8b<\/strong><\/h2>\n<p>my_list = [1, 2, 3, 4, 5]<\/p>\n<p>new_list = swap_ends_methods(my_list)<\/p>\n<p>print(new_list)  # \u8f93\u51fa: [5, 2, 3, 4, 1]<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u8fd9\u79cd\u65b9\u6cd5\u7684\u4f18\u70b9\u662f\u76f4\u63a5\u5728\u539f\u5217\u8868\u4e0a\u8fdb\u884c\u64cd\u4f5c\uff0c\u4e0d\u9700\u8981\u521b\u5efa\u65b0\u7684\u5217\u8868\u5bf9\u8c61\uff0c\u56e0\u6b64\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002\u7136\u800c\uff0c\u5b83\u4f1a\u4fee\u6539\u539f\u59cb\u5217\u8868\uff0c\u8fd9\u5728\u67d0\u4e9b\u5e94\u7528\u573a\u666f\u4e0b\u53ef\u80fd\u5e76\u4e0d\u662f\u6240\u671f\u671b\u7684\u3002<\/p>\n<\/p>\n<p><h3>\u4e09\u3001\u901a\u8fc7\u53cc\u91cd\u8d4b\u503c\u4ea4\u6362\u5143\u7d20<\/h3>\n<\/p>\n<p><p>Python\u4e2d\u7684\u53cc\u91cd\u8d4b\u503c\u662f\u4e00\u79cd\u7b80\u4fbf\u7684\u8bed\u6cd5\u7cd6\uff0c\u53ef\u4ee5\u7528\u4e8e\u4ea4\u6362\u5217\u8868\u4e2d\u7684\u4e24\u4e2a\u5143\u7d20\u3002\u4e0e\u5176\u4ed6\u65b9\u6cd5\u76f8\u6bd4\uff0c\u8fd9\u79cd\u65b9\u6cd5\u66f4\u52a0\u76f4\u63a5\uff0c\u9002\u7528\u4e8e\u5c0f\u89c4\u6a21\u7684\u5217\u8868\u64cd\u4f5c\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">def swap_ends_double_assign(lst):<\/p>\n<p>    if len(lst) &lt; 2:<\/p>\n<p>        return lst<\/p>\n<p>    lst[0], lst[-1] = lst[-1], lst[0]<\/p>\n<p>    return lst<\/p>\n<h2><strong>\u793a\u4f8b<\/strong><\/h2>\n<p>my_list = [1, 2, 3, 4, 5]<\/p>\n<p>new_list = swap_ends_double_assign(my_list)<\/p>\n<p>print(new_list)  # \u8f93\u51fa: [5, 2, 3, 4, 1]<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u8fd9\u79cd\u65b9\u6cd5\u7684\u4f18\u52bf\u5728\u4e8e\u7b80\u6d01\u660e\u4e86\uff0c\u5bf9\u4e8e\u5c0f\u5217\u8868\u6765\u8bf4\uff0c\u6548\u7387\u8f83\u9ad8\u3002\u800c\u4e14\uff0c\u5b83\u76f4\u63a5\u4fee\u6539\u4e86\u539f\u5217\u8868\uff0c\u9002\u5408\u9700\u8981\u539f\u5730\u4fee\u6539\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n<p><h3>\u56db\u3001\u4f7f\u7528NumPy\u5e93\u8fdb\u884c\u5bf9\u8c03<\/h3>\n<\/p>\n<p><p>\u5bf9\u4e8e\u9700\u8981\u5904\u7406\u5927\u89c4\u6a21\u6570\u636e\u7684\u573a\u5408\uff0c\u53ef\u4ee5\u4f7f\u7528NumPy\u5e93\u6765\u8fdb\u884c\u5934\u5c3e\u5bf9\u8c03\u3002NumPy\u63d0\u4f9b\u4e86\u9ad8\u6548\u7684\u6570\u7ec4\u64cd\u4f5c\u529f\u80fd\uff0c\u9002\u5408\u7528\u4e8e\u6570\u503c\u8ba1\u7b97\u548c\u6570\u636e\u5904\u7406\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import numpy as np<\/p>\n<p>def swap_ends_numpy(arr):<\/p>\n<p>    if len(arr) &lt; 2:<\/p>\n<p>        return arr<\/p>\n<p>    arr[0], arr[-1] = arr[-1], arr[0]<\/p>\n<p>    return arr<\/p>\n<h2><strong>\u793a\u4f8b<\/strong><\/h2>\n<p>my_array = np.array([1, 2, 3, 4, 5])<\/p>\n<p>new_array = swap_ends_numpy(my_array)<\/p>\n<p>print(new_array)  # \u8f93\u51fa: [5 2 3 4 1]<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u4f7f\u7528NumPy\u7684\u4f18\u52bf\u5728\u4e8e\u5b83\u80fd\u5bf9\u5927\u89c4\u6a21\u6570\u636e\u8fdb\u884c\u5feb\u901f\u5904\u7406\uff0c\u5e76\u4e14\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u6570\u7ec4\u64cd\u4f5c\u51fd\u6570\u3002\u5bf9\u4e8e\u9700\u8981\u8fdb\u884c\u590d\u6742\u6570\u636e\u5904\u7406\u7684\u5e94\u7528\u573a\u666f\uff0cNumPy\u662f\u4e00\u4e2a\u975e\u5e38\u597d\u7684\u9009\u62e9\u3002<\/p>\n<\/p>\n<p><h3>\u4e94\u3001\u901a\u8fc7\u9012\u5f52\u5b9e\u73b0\u5934\u5c3e\u5bf9\u8c03<\/h3>\n<\/p>\n<p><p>\u867d\u7136\u9012\u5f52\u5e76\u4e0d\u662f\u6700\u76f4\u89c2\u7684\u5b9e\u73b0\u65b9\u5f0f\uff0c\u4f46\u5728\u67d0\u4e9b\u573a\u5408\u4e0b\uff0c\u9012\u5f52\u53ef\u4ee5\u63d0\u4f9b\u4e00\u79cd\u4f18\u96c5\u7684\u89e3\u51b3\u65b9\u6848\u3002\u9012\u5f52\u65b9\u6cd5\u5c24\u5176\u9002\u5408\u5904\u7406\u9700\u8981\u590d\u6742\u903b\u8f91\u7684\u60c5\u51b5\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">def swap_ends_recursive(lst):<\/p>\n<p>    if len(lst) &lt; 2:<\/p>\n<p>        return lst<\/p>\n<p>    return [lst[-1]] + swap_ends_recursive(lst[1:-1]) + [lst[0]]<\/p>\n<h2><strong>\u793a\u4f8b<\/strong><\/h2>\n<p>my_list = [1, 2, 3, 4, 5]<\/p>\n<p>new_list = swap_ends_recursive(my_list)<\/p>\n<p>print(new_list)  # \u8f93\u51fa: [5, 2, 3, 4, 1]<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u9012\u5f52\u65b9\u6cd5\u7684\u597d\u5904\u5728\u4e8e\u80fd\u591f\u81ea\u7136\u5730\u5904\u7406\u5d4c\u5957\u7ed3\u6784\u548c\u9012\u5f52\u6a21\u5f0f\uff0c\u4f46\u5728\u5904\u7406\u5927\u89c4\u6a21\u6570\u636e\u65f6\u9700\u8981\u6ce8\u610f\u9012\u5f52\u6df1\u5ea6\u9650\u5236\u548c\u6027\u80fd\u95ee\u9898\u3002<\/p>\n<\/p>\n<p><p>\u7efc\u4e0a\u6240\u8ff0\uff0cPython\u4e2d\u5b9e\u73b0\u5934\u5c3e\u5bf9\u8c03\u7684\u65b9\u6cd5\u591a\u79cd\u591a\u6837\uff0c\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u9700\u8981\u6839\u636e\u5177\u4f53\u7684\u5e94\u7528\u573a\u666f\u3001\u6570\u636e\u89c4\u6a21\u4ee5\u53ca\u6027\u80fd\u8981\u6c42\u6765\u51b3\u5b9a\u3002\u65e0\u8bba\u662f\u7b80\u4fbf\u7684\u5207\u7247\u64cd\u4f5c\uff0c\u8fd8\u662f\u9ad8\u6548\u7684NumPy\u5904\u7406\uff0c\u90fd\u53ef\u4ee5\u7075\u6d3b\u5730\u6ee1\u8db3\u4e0d\u540c\u7684\u9700\u6c42\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p> <strong>\u5728Python\u4e2d\uff0c\u5982\u4f55\u65b9\u4fbf\u5730\u4ea4\u6362\u5b57\u7b26\u4e32\u7684\u9996\u5c3e\u5b57\u7b26\uff1f<\/strong><br \/>\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u5207\u7247\u6765\u5b9e\u73b0\u5b57\u7b26\u4e32\u9996\u5c3e\u5b57\u7b26\u7684\u4ea4\u6362\u3002\u5177\u4f53\u65b9\u6cd5\u662f\u901a\u8fc7\u5207\u7247\u5c06\u5b57\u7b26\u4e32\u7684\u7b2c\u4e00\u4e2a\u5b57\u7b26\u548c\u6700\u540e\u4e00\u4e2a\u5b57\u7b26\u4e92\u6362\u3002\u793a\u4f8b\u5982\u4e0b\uff1a  <\/p>\n<pre><code class=\"language-python\">def swap_first_last(s):\n    if len(s) &lt;= 1:  # \u5982\u679c\u5b57\u7b26\u4e32\u957f\u5ea6\u5c0f\u4e8e\u7b49\u4e8e1\uff0c\u76f4\u63a5\u8fd4\u56de\n        return s\n    return s[-1] + s[1:-1] + s[0]\n\nresult = swap_first_last(&quot;hello&quot;)\nprint(result)  # \u8f93\u51fa &quot;oellh&quot;\n<\/code><\/pre>\n<p>\u8fd9\u79cd\u65b9\u6cd5\u7b80\u5355\u660e\u4e86\uff0c\u9002\u5408\u4e8e\u5904\u7406\u77ed\u5b57\u7b26\u4e32\u3002<\/p>\n<p><strong>\u5728\u5217\u8868\u4e2d\u5982\u4f55\u5b9e\u73b0\u9996\u5c3e\u5143\u7d20\u7684\u4ea4\u6362\uff1f<\/strong><br \/>\u5982\u679c\u9700\u8981\u5728\u5217\u8868\u4e2d\u4ea4\u6362\u9996\u5c3e\u5143\u7d20\uff0c\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee\u7d22\u5f150\u548c-1\u3002\u793a\u4f8b\u5982\u4e0b\uff1a  <\/p>\n<pre><code class=\"language-python\">def swap_first_last(lst):\n    if len(lst) &lt; 2:  # \u5982\u679c\u5217\u8868\u957f\u5ea6\u5c0f\u4e8e2\uff0c\u76f4\u63a5\u8fd4\u56de\n        return lst\n    lst[0], lst[-1] = lst[-1], lst[0]\n    return lst\n\nresult = swap_first_last([1, 2, 3, 4])\nprint(result)  # \u8f93\u51fa [4, 2, 3, 1]\n<\/code><\/pre>\n<p>\u8fd9\u79cd\u65b9\u6cd5\u4e0d\u4ec5\u7b80\u6d01\uff0c\u800c\u4e14\u6548\u7387\u9ad8\uff0c\u975e\u5e38\u9002\u5408\u5904\u7406\u5927\u578b\u5217\u8868\u3002<\/p>\n<p><strong>\u5982\u4f55\u5728Python\u4e2d\u5bf9\u8c03\u5b57\u5178\u7684\u9996\u5c3e\u952e\u503c\u5bf9\uff1f<\/strong><br \/>\u5b57\u5178\u7684\u952e\u503c\u5bf9\u4ea4\u6362\u53ef\u4ee5\u901a\u8fc7\u6784\u5efa\u4e00\u4e2a\u65b0\u7684\u5b57\u5178\u6765\u5b9e\u73b0\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5b57\u5178\u662f\u65e0\u5e8f\u7684\uff0c\u5728Python 3.7\u53ca\u4ee5\u4e0a\u7248\u672c\u4e2d\u4fdd\u6301\u63d2\u5165\u987a\u5e8f\uff0c\u4f46\u5bf9\u4e8e\u9996\u5c3e\u5bf9\u8c03\u7684\u6982\u5ff5\uff0c\u9700\u8981\u5148\u8f6c\u4e3a\u5217\u8868\u3002\u793a\u4f8b\u5982\u4e0b\uff1a  <\/p>\n<pre><code class=\"language-python\">def swap_first_last_dict(d):\n    if len(d) &lt; 2:  # \u5982\u679c\u5b57\u5178\u957f\u5ea6\u5c0f\u4e8e2\uff0c\u76f4\u63a5\u8fd4\u56de\n        return d\n    keys = list(d.keys())\n    keys[0], keys[-1] = keys[-1], keys[0]\n    return {keys[i]: d[keys[i]] for i in range(len(keys))}\n\nresult = swap_first_last_dict({&#39;a&#39;: 1, &#39;b&#39;: 2, &#39;c&#39;: 3})\nprint(result)  # \u8f93\u51fa {&#39;c&#39;: 3, &#39;b&#39;: 2, &#39;a&#39;: 1}\n<\/code><\/pre>\n<p>\u8fd9\u79cd\u65b9\u6cd5\u53ef\u4ee5\u7075\u6d3b\u5904\u7406\u5b57\u5178\u7684\u9996\u5c3e\u952e\u503c\u5bf9\u4ea4\u6362\u95ee\u9898\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\uff0c\u5934\u5c3e\u5bf9\u8c03\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u5b9e\u73b0\uff0c\u5305\u62ec\u4f7f\u7528\u5207\u7247\u3001\u4ea4\u6362\u53d8\u91cf\u3001\u5217\u8868\u65b9\u6cd5\u7b49\u3002\u5177\u4f53\u65b9\u6cd5\u5305\u62ec\uff1a\u4f7f\u7528\u5207\u7247\u64cd\u4f5c [&hellip;]","protected":false},"author":3,"featured_media":979844,"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\/979836"}],"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=979836"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/979836\/revisions"}],"predecessor-version":[{"id":979845,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/979836\/revisions\/979845"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/979844"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=979836"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=979836"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=979836"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}