{"id":971830,"date":"2024-12-27T05:38:30","date_gmt":"2024-12-26T21:38:30","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/971830.html"},"modified":"2024-12-27T05:38:32","modified_gmt":"2024-12-26T21:38:32","slug":"python%e5%a6%82%e4%bd%95%e5%af%b9%e7%9f%a9%e9%98%b5%e9%81%8d%e5%8e%86","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/971830.html","title":{"rendered":"python\u5982\u4f55\u5bf9\u77e9\u9635\u904d\u5386"},"content":{"rendered":"<p style=\"text-align:center;\" ><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/24194758\/9f22263e-490c-467d-9c3d-536eb5ae2017.webp\" alt=\"python\u5982\u4f55\u5bf9\u77e9\u9635\u904d\u5386\" \/><\/p>\n<p><p> \u5728Python\u4e2d\uff0c\u904d\u5386\u77e9\u9635\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u8fdb\u884c\uff0c\u4e3b\u8981\u5305\u62ec<strong>\u4f7f\u7528\u5d4c\u5957\u7684for\u5faa\u73af\u3001\u5229\u7528NumPy\u5e93\u3001\u5217\u8868\u751f\u6210\u5f0f\u3001\u4ee5\u53caitertools\u6a21\u5757<\/strong>\u3002\u5176\u4e2d\uff0c\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u662f\u4f7f\u7528\u5d4c\u5957\u7684for\u5faa\u73af\u3002\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u6211\u4eec\u53ef\u4ee5\u8bbf\u95ee\u77e9\u9635\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\uff0c\u5e76\u5bf9\u5176\u8fdb\u884c\u64cd\u4f5c\u3002\u5728\u8fd9\u91cc\uff0c\u6211\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528\u5d4c\u5957\u7684for\u5faa\u73af\u6765\u904d\u5386\u77e9\u9635\u3002<\/p>\n<\/p>\n<p><p>\u4f7f\u7528\u5d4c\u5957\u7684for\u5faa\u73af\u5bf9\u77e9\u9635\u8fdb\u884c\u904d\u5386\u65f6\uff0c\u9996\u5148\u9700\u8981\u660e\u767d\u77e9\u9635\u7684\u672c\u8d28\u662f\u4e00\u4e2a\u5305\u542b\u591a\u4e2a\u5217\u8868\u7684\u5217\u8868\u3002\u6bcf\u4e2a\u5b50\u5217\u8868\u4ee3\u8868\u77e9\u9635\u7684\u4e00\u884c\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e24\u4e2afor\u5faa\u73af\u6765\u904d\u5386\u6240\u6709\u7684\u884c\u548c\u5217\u3002\u5728\u7b2c\u4e00\u4e2afor\u5faa\u73af\u4e2d\uff0c\u6211\u4eec\u8fed\u4ee3\u884c\u5217\u8868\uff0c\u7136\u540e\u5728\u7b2c\u4e8c\u4e2afor\u5faa\u73af\u4e2d\u8fed\u4ee3\u6bcf\u4e00\u884c\u4e2d\u7684\u5143\u7d20\u3002\u8fd9\u6837\u5c31\u80fd\u5b9e\u73b0\u5bf9\u6574\u4e2a\u77e9\u9635\u7684\u904d\u5386\u3002<\/p>\n<\/p>\n<p><p>\u4e00\u3001\u5d4c\u5957\u7684for\u5faa\u73af\u904d\u5386\u77e9\u9635<\/p>\n<\/p>\n<p><p>\u5728Python\u4e2d\uff0c\u6700\u76f4\u89c2\u7684\u65b9\u6cd5\u5c31\u662f\u4f7f\u7528\u5d4c\u5957\u7684for\u5faa\u73af\u6765\u904d\u5386\u77e9\u9635\u3002\u901a\u8fc7\u4e24\u4e2afor\u5faa\u73af\uff0c\u6211\u4eec\u53ef\u4ee5\u8bbf\u95ee\u77e9\u9635\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\"># \u793a\u4f8b\u77e9\u9635<\/p>\n<p>matrix = [<\/p>\n<p>    [1, 2, 3],<\/p>\n<p>    [4, 5, 6],<\/p>\n<p>    [7, 8, 9]<\/p>\n<p>]<\/p>\n<h2><strong>\u5d4c\u5957for\u5faa\u73af\u904d\u5386\u77e9\u9635<\/strong><\/h2>\n<p>for row in matrix:<\/p>\n<p>    for element in row:<\/p>\n<p>        print(element)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u7b2c\u4e00\u4e2afor\u5faa\u73af\u904d\u5386\u6bcf\u4e00\u884c\uff0c\u7b2c\u4e8c\u4e2afor\u5faa\u73af\u904d\u5386\u884c\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\u3002\u8fd9\u79cd\u65b9\u6cd5\u7b80\u5355\u76f4\u63a5\uff0c\u9002\u7528\u4e8e\u5927\u591a\u6570\u573a\u666f\u3002<\/p>\n<\/p>\n<p><p>\u4e8c\u3001\u4f7f\u7528NumPy\u5e93<\/p>\n<\/p>\n<p><p>NumPy\u662fPython\u4e2d\u4e00\u4e2a\u5f3a\u5927\u7684\u6570\u503c\u8ba1\u7b97\u5e93\uff0c\u63d0\u4f9b\u4e86\u8bb8\u591a\u65b9\u4fbf\u7684\u51fd\u6570\u6765\u5904\u7406\u77e9\u9635\u548c\u6570\u7ec4\u3002\u4f7f\u7528NumPy\u53ef\u4ee5\u7b80\u5316\u77e9\u9635\u7684\u904d\u5386\u8fc7\u7a0b\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import numpy as np<\/p>\n<h2><strong>\u521b\u5efaNumPy\u6570\u7ec4<\/strong><\/h2>\n<p>matrix = np.array([<\/p>\n<p>    [1, 2, 3],<\/p>\n<p>    [4, 5, 6],<\/p>\n<p>    [7, 8, 9]<\/p>\n<p>])<\/p>\n<h2><strong>NumPy\u904d\u5386\u77e9\u9635<\/strong><\/h2>\n<p>for element in np.nditer(matrix):<\/p>\n<p>    print(element)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p><strong>np.nditer<\/strong>\u662fNumPy\u63d0\u4f9b\u7684\u4e00\u4e2a\u591a\u7ef4\u6570\u7ec4\u8fed\u4ee3\u5668\uff0c\u80fd\u591f\u9ad8\u6548\u5730\u904d\u5386\u77e9\u9635\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\u3002\u4e0e\u5d4c\u5957for\u5faa\u73af\u76f8\u6bd4\uff0c\u4f7f\u7528NumPy\u5e93\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u6548\u7387\u3002<\/p>\n<\/p>\n<p><p>\u4e09\u3001\u4f7f\u7528\u5217\u8868\u751f\u6210\u5f0f<\/p>\n<\/p>\n<p><p>\u5217\u8868\u751f\u6210\u5f0f\u662f\u4e00\u79cd\u7b80\u6d01\u7684\u8bed\u6cd5\uff0c\u53ef\u4ee5\u7528\u6765\u521b\u5efa\u65b0\u7684\u5217\u8868\u3002\u5728\u904d\u5386\u77e9\u9635\u65f6\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u4f7f\u7528\u5217\u8868\u751f\u6210\u5f0f\u6765\u8bbf\u95ee\u77e9\u9635\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\"># \u793a\u4f8b\u77e9\u9635<\/p>\n<p>matrix = [<\/p>\n<p>    [1, 2, 3],<\/p>\n<p>    [4, 5, 6],<\/p>\n<p>    [7, 8, 9]<\/p>\n<p>]<\/p>\n<h2><strong>\u5217\u8868\u751f\u6210\u5f0f\u904d\u5386\u77e9\u9635<\/strong><\/h2>\n<p>elements = [element for row in matrix for element in row]<\/p>\n<p>print(elements)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u5217\u8868\u751f\u6210\u5f0f\u901a\u8fc7\u4e24\u4e2afor\u5faa\u73af\u5d4c\u5957\u7684\u65b9\u5f0f\uff0c\u904d\u5386\u77e9\u9635\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\uff0c\u5e76\u5c06\u5176\u6dfb\u52a0\u5230\u65b0\u7684\u5217\u8868\u4e2d\u3002\u8fd9\u79cd\u65b9\u6cd5\u7b80\u6d01\u660e\u4e86\uff0c\u9002\u5408\u9700\u8981\u5bf9\u904d\u5386\u7ed3\u679c\u8fdb\u884c\u8fdb\u4e00\u6b65\u5904\u7406\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n<p><p>\u56db\u3001\u4f7f\u7528itertools\u6a21\u5757<\/p>\n<\/p>\n<p><p>itertools\u662fPython\u6807\u51c6\u5e93\u4e2d\u7684\u4e00\u4e2a\u6a21\u5757\uff0c\u63d0\u4f9b\u4e86\u8bb8\u591a\u7528\u4e8e\u8fed\u4ee3\u64cd\u4f5c\u7684\u51fd\u6570\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528itertools.ch<a href=\"https:\/\/docs.pingcode.com\/blog\/59162.html\" target=\"_blank\">AI<\/a>n\u6765\u5c06\u591a\u4e2a\u5217\u8868\u8fde\u63a5\u6210\u4e00\u4e2a\u8fed\u4ee3\u5668\uff0c\u4ece\u800c\u904d\u5386\u6574\u4e2a\u77e9\u9635\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">import itertools<\/p>\n<h2><strong>\u793a\u4f8b\u77e9\u9635<\/strong><\/h2>\n<p>matrix = [<\/p>\n<p>    [1, 2, 3],<\/p>\n<p>    [4, 5, 6],<\/p>\n<p>    [7, 8, 9]<\/p>\n<p>]<\/p>\n<h2><strong>itertools.chain\u904d\u5386\u77e9\u9635<\/strong><\/h2>\n<p>for element in itertools.chain(*matrix):<\/p>\n<p>    print(element)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p><strong>itertools.chain<\/strong>\u51fd\u6570\u53ef\u4ee5\u5c06\u591a\u4e2a\u53ef\u8fed\u4ee3\u5bf9\u8c61\u8fde\u63a5\u6210\u4e00\u4e2a\u5355\u4e00\u7684\u8fed\u4ee3\u5668\u3002\u5728\u904d\u5386\u77e9\u9635\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u5229\u7528\u8be5\u51fd\u6570\u5c06\u77e9\u9635\u4e2d\u7684\u6bcf\u4e00\u884c\u8fde\u63a5\u8d77\u6765\uff0c\u7136\u540e\u9010\u4e2a\u8bbf\u95ee\u5143\u7d20\u3002<\/p>\n<\/p>\n<p><p>\u603b\u7ed3\u6765\u8bf4\uff0c\u904d\u5386\u77e9\u9635\u7684\u65b9\u6cd5\u591a\u79cd\u591a\u6837\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u6700\u9002\u5408\u7684\u65b9\u5f0f\u3002\u5bf9\u4e8e\u7b80\u5355\u7684\u904d\u5386\u4efb\u52a1\uff0c\u5d4c\u5957for\u5faa\u73af\u662f\u6700\u5e38\u7528\u7684\u65b9\u6cd5\uff1b\u800c\u5728\u9700\u8981\u8fdb\u884c\u590d\u6742\u64cd\u4f5c\u6216\u63d0\u9ad8\u6548\u7387\u65f6\uff0cNumPy\u5e93\u548citertools\u6a21\u5757\u5219\u63d0\u4f9b\u4e86\u66f4\u5f3a\u5927\u7684\u5de5\u5177\u3002\u901a\u8fc7\u5bf9\u8fd9\u4e9b\u65b9\u6cd5\u7684\u7075\u6d3b\u8fd0\u7528\uff0cPython\u7a0b\u5e8f\u5458\u53ef\u4ee5\u8f7b\u677e\u5730\u64cd\u4f5c\u548c\u5904\u7406\u77e9\u9635\u6570\u636e\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p> <strong>\u5982\u4f55\u5728Python\u4e2d\u9ad8\u6548\u904d\u5386\u77e9\u9635\uff1f<\/strong><br \/>\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u5d4c\u5957\u5faa\u73af\u6765\u904d\u5386\u77e9\u9635\u3002\u901a\u8fc7\u4e24\u5c42\u5faa\u73af\uff0c\u5916\u5c42\u5faa\u73af\u904d\u5386\u884c\uff0c\u5185\u5c42\u5faa\u73af\u904d\u5386\u5217\u3002\u4f7f\u7528NumPy\u5e93\u65f6\uff0c\u53ef\u4ee5\u5229\u7528\u5176\u5185\u7f6e\u51fd\u6570\u8fdb\u884c\u66f4\u7b80\u6d01\u7684\u904d\u5386\u3002\u4f8b\u5982\uff0c<code>numpy.nditer()<\/code>\u53ef\u4ee5\u9ad8\u6548\u5730\u904d\u5386\u591a\u7ef4\u6570\u7ec4\u3002<\/p>\n<p><strong>\u4f7f\u7528\u54ea\u4e9b\u5e93\u53ef\u4ee5\u7b80\u5316\u77e9\u9635\u904d\u5386\u8fc7\u7a0b\uff1f<\/strong><br \/>\u9664\u4e86Python\u7684\u5185\u7f6e\u5217\u8868\u5916\uff0cNumPy\u662f\u4e00\u4e2a\u975e\u5e38\u5f3a\u5927\u7684\u5e93\uff0c\u4e13\u95e8\u7528\u4e8e\u5904\u7406\u77e9\u9635\u548c\u591a\u7ef4\u6570\u7ec4\u3002\u5b83\u63d0\u4f9b\u4e86\u591a\u79cd\u65b9\u6cd5\u6765\u904d\u5386\u548c\u64cd\u4f5c\u77e9\u9635\uff0c\u4f8b\u5982\u4f7f\u7528<code>numpy.array()<\/code>\u521b\u5efa\u77e9\u9635\uff0c\u7ed3\u5408<code>numpy.flatten()<\/code>\u5c06\u77e9\u9635\u5c55\u5e73\uff0c\u4fbf\u4e8e\u4e00\u7ef4\u904d\u5386\u3002<\/p>\n<p><strong>\u5728\u904d\u5386\u77e9\u9635\u65f6\uff0c\u5982\u4f55\u907f\u514d\u7d22\u5f15\u9519\u8bef\uff1f<\/strong><br \/>\u5728\u904d\u5386\u77e9\u9635\u65f6\uff0c\u53ef\u4ee5\u5148\u786e\u8ba4\u77e9\u9635\u7684\u7ef4\u5ea6\uff0c\u4f8b\u5982\u4f7f\u7528<code>len(matrix)<\/code>\u83b7\u53d6\u884c\u6570\uff0c\u4f7f\u7528<code>len(matrix[0])<\/code>\u83b7\u53d6\u5217\u6570\u3002\u4f7f\u7528\u8fd9\u4e9b\u4fe1\u606f\u53ef\u4ee5\u786e\u4fdd\u5728\u8bbf\u95ee\u5143\u7d20\u65f6\u4e0d\u4f1a\u8d85\u51fa\u77e9\u9635\u7684\u8fb9\u754c\u3002\u6b64\u5916\uff0c\u4f7f\u7528<code>enumerate()<\/code>\u51fd\u6570\u6765\u540c\u65f6\u83b7\u53d6\u7d22\u5f15\u548c\u5143\u7d20\u4e5f\u80fd\u51cf\u5c11\u51fa\u9519\u7684\u6982\u7387\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\uff0c\u904d\u5386\u77e9\u9635\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u8fdb\u884c\uff0c\u4e3b\u8981\u5305\u62ec\u4f7f\u7528\u5d4c\u5957\u7684for\u5faa\u73af\u3001\u5229\u7528NumPy\u5e93\u3001\u5217\u8868\u751f\u6210\u5f0f\u3001\u4ee5 [&hellip;]","protected":false},"author":3,"featured_media":971834,"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\/971830"}],"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=971830"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/971830\/revisions"}],"predecessor-version":[{"id":971839,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/971830\/revisions\/971839"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/971834"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=971830"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=971830"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=971830"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}