{"id":219,"date":"2023-07-16T01:05:01","date_gmt":"2023-11-29T01:34:48","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/python%e7%9a%84log%e5%87%bd%e6%95%b0%e7%94%a8%e4%ba%8e%e8%ae%a1%e7%ae%97%e5%af%b9%e6%95%b0%e3%80%82\/"},"modified":"2025-08-01T02:32:44","modified_gmt":"2025-07-31T18:32:44","slug":"python%e7%9a%84log%e5%87%bd%e6%95%b0%e7%94%a8%e4%ba%8e%e8%ae%a1%e7%ae%97%e5%af%b9%e6%95%b0%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/python%e7%9a%84log%e5%87%bd%e6%95%b0%e7%94%a8%e4%ba%8e%e8%ae%a1%e7%ae%97%e5%af%b9%e6%95%b0%e3%80%82\/","title":{"rendered":"Python log()\u51fd\u6570\u8be6\u89e3\uff1a\u8ba1\u7b97\u81ea\u7136\u5bf9\u6570\u3001\u5e38\u7528\u5bf9\u6570\u53ca\u4efb\u610f\u5e95\u5bf9\u6570"},"content":{"rendered":"<p>\u8fd9\u662f\u6587\u7ae0\u300aPython\u7684log()\u51fd\u6570\u7528\u4e8e\u8ba1\u7b97\u5bf9\u6570\u300b\u7684\u7b2c1\u90e8\u5206\uff08\u51712\u90e8\u5206\uff09\u3002<\/p>\n<p>\u5185\u5bb9\u7247\u6bb5: \u5bf9\u6570\u88ab\u7528\u6765\u63cf\u8ff0\u548c\u8868\u793a\u5927\u6570\u5b57\u3002\u5bf9\u6570\u662f\u6307\u6570\u7684\u5012\u6570\u3002\u672c\u6587\u5c06\u6df1\u5165\u4ecb\u7ecdPython\u7684log()\u51fd\u6570\u3002Python\u7684\u5bf9\u6570\u51fd\u6570\u53ef\u4ee5\u5e2e\u52a9\u7528\u6237\u66f4\u8f7b\u677e\u9ad8\u6548\u5730\u627e\u5230\u6570\u5b57\u7684\u5bf9\u6570\u3002<\/p>\n<hr \/>\n<h2>\u7406\u89e3Python\u4e2d\u7684log()\u51fd\u6570<\/h2>\n<p>\u4e3a\u4e86\u4f7f\u7528\u5bf9\u6570\u51fd\u6570\u7684\u529f\u80fd\uff0c\u6211\u4eec\u9700\u8981\u4f7f\u7528\u4ee5\u4e0b\u8bed\u53e5\u5bfc\u5165\u6570\u5b66\u6a21\u5757\uff1a<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">import<\/span> math\r\n<\/code><\/pre>\n<p>\u6211\u4eec\u9700\u8981\u6ce8\u610f\u5230\u4e00\u4e2a\u4e8b\u5b9e\uff0cPython\u7684\u5bf9\u6570\u51fd\u6570\u4e0d\u80fd\u76f4\u63a5\u8bbf\u95ee\u3002\u6211\u4eec\u9700\u8981\u4f7f\u7528<code>math<\/code>\u6a21\u5757\u6765\u5728\u4ee3\u7801\u4e2d\u8bbf\u95ee\u5bf9\u6570\u51fd\u6570\u3002<\/p>\n<h3>\u8bed\u6cd5:<\/h3>\n<pre class=\"post-pre\"><code>math<span class=\"token punctuation\">.<\/span>log<span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">)<\/span>\r\n<\/code><\/pre>\n<p>\u6570\u5b66\u4e2d\u7684<code>math.log(x)<\/code>\u51fd\u6570\u7528\u4e8e\u8ba1\u7b97\u4f20\u9012\u7ed9\u5b83\u7684\u53c2\u6570\u503c\uff08\u6570\u503c\u8868\u8fbe\u5f0f\uff09\u7684\u81ea\u7136\u5bf9\u6570\u503c\uff0c\u5373\u4ee5e\u4e3a\u5e95\u7684\u5bf9\u6570\uff08\u6b27\u62c9\u6570\u7ea6\u4e3a2.71828\uff09\u3002<\/p>\n<p>\u793a\u4f8b\uff1a<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">import<\/span> math   \r\n\r\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"Log value: \"<\/span><span class=\"token punctuation\">,<\/span> math<span class=\"token punctuation\">.<\/span>log<span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u7247\u6bb5\u4e2d\uff0c\u6211\u4eec\u6b63\u5728\u8bf7\u6c422\u7684\u5bf9\u6570\u503c\u3002<\/p>\n<h3>\u8f93\u51fa\uff1a<\/h3>\n<pre class=\"post-pre\"><code>Log value<span class=\"token punctuation\">:<\/span>  <span class=\"token number\">0.6931471805599453<\/span>\r\n<\/code><\/pre>\n<hr \/>\n<h2>Python\u7684log()\u51fd\u6570\u7684\u53d8\u4f53<\/h2>\n<p>\u4ee5\u4e0b\u662fPython\u4e2d\u57fa\u672c\u5bf9\u6570\u51fd\u6570\u7684\u53d8\u79cd\uff1a<\/p>\n<ul class=\"post-ul\">\n<li><code>log2(x)<\/code><\/li>\n<li><code>log(x, Base)<\/code><\/li>\n<li><code>log10(x)<\/code><\/li>\n<li><code>log1p(x)<\/code><\/li>\n<\/ul>\n<hr \/>\n<h3>1. \u4ee52\u4e3a\u5e95\u7684log(x) &#8211; <code>math.log2(x)<\/code><\/h3>\n<p><code>math.log2(x)<\/code>\u51fd\u6570\u7528\u4e8e\u8ba1\u7b97\u4ee52\u4e3a\u5e95\u7684\u6570\u503c\u8868\u8fbe\u5f0f\u7684\u5bf9\u6570\u503c\u3002<\/p>\n<h3>\u8bed\u6cd5\uff1a<\/h3>\n<pre class=\"post-pre\"><code>math.log2(numeric expression)\r\n<\/code><\/pre>\n<h3>\u793a\u4f8b\uff1a<\/h3>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">import<\/span> math \r\n\r\n<span class=\"token keyword\">print<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token string\">\"\u4ee52\u4e3a\u5e95\u7684\u5bf9\u6570\u503c: \"<\/span><span class=\"token punctuation\">)<\/span> \r\n<span class=\"token keyword\">print<\/span> <span class=\"token punctuation\">(<\/span>math<span class=\"token punctuation\">.<\/span>log2<span class=\"token punctuation\">(<\/span><span class=\"token number\">20<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> \r\n\r\n<\/code><\/pre>\n<h3>\u7ed3\u679c\uff1a<\/h3>\n<pre class=\"post-pre\"><code>\u4ee52\u4e3a\u5e95\u7684\u5bf9\u6570\u503c: \r\n<span class=\"token number\">4.321928094887363<\/span>\r\n<\/code><\/pre>\n<hr \/>\n<h3>2. \u4ee5Base\u4e3a\u5e95\u7684log(x) &#8211; <code>math.log(x, Base)<\/code><\/h3>\n<p><code>math.log(x, Base)<\/code>\u51fd\u6570\u7528\u4e8e\u8ba1\u7b97\u4ee5\u7279\u5b9a\uff08\u671f\u671b\uff09\u5e95\u6570\u503c\u4e3a\u57fa\u7840\u7684\u6570\u503c\u8868\u8fbe\u5f0fx\u7684\u5bf9\u6570\u503c\u3002<\/p>\n<h3>\u8bed\u6cd5\uff1a<\/h3>\n<pre class=\"post-pre\"><code>math<span class=\"token punctuation\">.<\/span>log<span class=\"token punctuation\">(<\/span>numeric_expression<span class=\"token punctuation\">,<\/span>base_value<span class=\"token punctuation\">)<\/span>\r\n<\/code><\/pre>\n<p>\u8fd9\u4e2a\u51fd\u6570\u63a5\u53d7\u4e24\u4e2a\u53c2\u6570\u3002<\/p>\n<ul class=\"post-ul\">\n<li>\u6570\u503c\u8868\u8fbe\u5f0f (numeric expression)<\/li>\n<li>\u5e95\u6570 (Base value)<\/li>\n<\/ul>\n<p>\u6ce8\u610f\uff1a\u5982\u679c\u51fd\u6570\u4e2d\u672a\u63d0\u4f9b\u57fa\u503c\uff0c\u5219<code>math.log(x, (Base))<\/code>\u5c06\u4f5c\u4e3a\u57fa\u672c\u7684\u5bf9\u6570\u51fd\u6570\uff0c\u5e76\u8ba1\u7b97\u6570\u503c\u8868\u8fbe\u5f0f\u4ee5\u81ea\u7136\u5bf9\u6570\u4e3a\u5e95\u7684\u5bf9\u6570\u3002<\/p>\n<h3>\u793a\u4f8b\uff1a<\/h3>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">import<\/span> math \r\n\r\n<span class=\"token keyword\">print<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token string\">\"\u4ee54\u4e3a\u5e95\u7684\u5bf9\u6570\u503c: \"<\/span><span class=\"token punctuation\">)<\/span> \r\n<span class=\"token keyword\">print<\/span> <span class=\"token punctuation\">(<\/span>math<span class=\"token punctuation\">.<\/span>log<span class=\"token punctuation\">(<\/span><span class=\"token number\">20<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> \r\n\r\n<\/code><\/pre>\n<h3>\u8f93\u51fa\uff1a<\/h3>\n<pre class=\"post-pre\"><code>\u4ee54\u4e3a\u5e95\u7684\u5bf9\u6570\u503c: \r\n<span class=\"token number\">2.1609640474436813<\/span>\r\n<\/code><\/pre>\n<hr \/>\n<h3>3. log10(x) &#8211; \u4ee510\u4e3a\u5e95\u7684\u5bf9\u6570<\/h3>\n<p>\u6570\u5b66\u51fd\u6570<code>math.log10(x)<\/code>\u8ba1\u7b97\u6570\u503c\u8868\u8fbe\u5f0f\u5728\u4ee510\u4e3a\u5e95\u7684\u5bf9\u6570\u503c\u3002<\/p>\n<h3>\u8bed\u6cd5\uff1a<\/h3>\n<pre class=\"post-pre\"><code>math<span class=\"token punctuation\">.<\/span>log10<span class=\"token punctuation\">(<\/span>numeric_expression<span class=\"token punctuation\">)<\/span>\r\n<\/code><\/pre>\n<h3>\u793a\u4f8b\uff1a<\/h3>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">import<\/span> math \r\n\r\n<span class=\"token keyword\">print<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token string\">\"\u4ee510\u4e3a\u5e95\u7684\u5bf9\u6570\u503c: \"<\/span><span class=\"token punctuation\">)<\/span> \r\n<span class=\"token keyword\">print<\/span> <span class=\"token punctuation\">(<\/span>math<span class=\"token punctuation\">.<\/span>log10<span class=\"token punctuation\">(<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> \r\n\r\n<\/code><\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u7247\u6bb5\u4e2d\uff0c\u8ba1\u7b97\u4e86\u4ee510\u4e3a\u5e95\u768415\u7684\u5bf9\u6570\u503c\u3002<\/p>\n<h3>\u8f93\u51fa\uff1a<\/h3>\n<pre class=\"post-pre\"><code>\u4ee510\u4e3a\u5e95\u7684\u5bf9\u6570\u503c: \r\n<span class=\"token number\">1.1760912590556813<\/span>\r\n<\/code><\/pre>\n<hr \/>\n<h3>4. log1p(x) &#8211; \u5bf9\u6570\u589e\u91cf\u51fd\u6570<\/h3>\n<p>\u8fd9\u662f\u6587\u7ae0\u300aPython\u7684log()\u51fd\u6570\u7528\u4e8e\u8ba1\u7b97\u5bf9\u6570\u300b\u7684\u7b2c2\u90e8\u5206\uff08\u51712\u90e8\u5206\uff09\u3002<\/p>\n<h3>\u6570\u5b66\u51fd\u6570 math.log1p(x)<\/h3>\n<p>\u6570\u5b66\u51fd\u6570 <code>math.log1p(x)<\/code> \u7528\u4e8e\u8ba1\u7b97\u7ed9\u5b9a\u8f93\u5165\u503c <code>x<\/code> \u7684 <code>log(1+x)<\/code>\u3002<\/p>\n<p><strong>\u6ce8\u610f\uff1a<\/strong><code>math.log1p(1+x)<\/code> \u7b49\u540c\u4e8e <code>math.log(x)<\/code>\u3002<\/p>\n<h4>\u8bed\u6cd5\uff1a<\/h4>\n<pre class=\"post-pre\"><code>math.log1p(numeric_expression)\r\n<\/code><\/pre>\n<h4>\u793a\u4f8b\uff1a<\/h4>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">import<\/span> math \r\n\r\n<span class=\"token keyword\">print<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token string\">\"Log value(1+15) for x = 15 is: \"<\/span><span class=\"token punctuation\">)<\/span> \r\n<span class=\"token keyword\">print<\/span> <span class=\"token punctuation\">(<\/span>math<span class=\"token punctuation\">.<\/span>log1p<span class=\"token punctuation\">(<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> \r\n<\/code><\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u7247\u6bb5\u4e2d\uff0c\u8ba1\u7b97\u4e86\u8f93\u5165\u8868\u8fbe\u5f0f15\u7684 <code>log(1+15)<\/code> \u7684\u5bf9\u6570\u503c\u3002<\/p>\n<p>\u56e0\u6b64\uff0c<code>math.log1p(15)<\/code> \u4e0e <code>math.log(16)<\/code> \u7b49\u4ef7\u3002<\/p>\n<h4>\u8f93\u51fa\uff1a<\/h4>\n<pre class=\"post-pre\"><code>Log value<span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token operator\">+<\/span><span class=\"token number\">15<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">for<\/span> x <span class=\"token operator\">=<\/span> <span class=\"token number\">15<\/span> <span class=\"token keyword\">is<\/span><span class=\"token punctuation\">:<\/span> \r\n<span class=\"token number\">2.772588722239781<\/span>\r\n<\/code><\/pre>\n<hr \/>\n<h2>\u7406\u89e3 Python NumPy \u4e2d\u7684\u5bf9\u6570\u51fd\u6570<\/h2>\n<p>Python NumPy \u5141\u8bb8\u6211\u4eec\u540c\u65f6\u8ba1\u7b97\u8f93\u5165 NumPy \u6570\u7ec4\u5143\u7d20\u7684\u81ea\u7136\u5bf9\u6570\u503c\u3002<\/p>\n<p>\u4e3a\u4e86\u4f7f\u7528 <code>numpy.log()<\/code> \u65b9\u6cd5\uff0c\u6211\u4eec\u9700\u8981\u4f7f\u7528\u4e0b\u9762\u7684\u8bed\u53e5\u5bfc\u5165 NumPy \u6a21\u5757\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">import<\/span> numpy\r\n<\/code><\/pre>\n<h4>\u8bed\u6cd5\uff1a<\/h4>\n<pre class=\"post-pre\"><code>numpy<span class=\"token punctuation\">.<\/span>log<span class=\"token punctuation\">(<\/span>input_array<span class=\"token punctuation\">)<\/span>\r\n<\/code><\/pre>\n<p><code>numpy.log()<\/code> \u51fd\u6570\u63a5\u53d7\u6570\u7ec4\u4f5c\u4e3a\u53c2\u6570\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u5305\u542b\u5176\u5143\u7d20\u5bf9\u6570\u503c\u7684\u6570\u7ec4\u3002<\/p>\n<h4>\u793a\u4f8b\uff1a<\/h4>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">import<\/span> numpy <span class=\"token keyword\">as<\/span> np \r\n\r\ninp_arr <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">20<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">30<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">40<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">50<\/span><span class=\"token punctuation\">]<\/span> \r\n<span class=\"token keyword\">print<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token string\">\"Array input elements:\\n\"<\/span><span class=\"token punctuation\">,<\/span> inp_arr<span class=\"token punctuation\">)<\/span> \r\n\r\nres_arr <span class=\"token operator\">=<\/span> np<span class=\"token punctuation\">.<\/span>log<span class=\"token punctuation\">(<\/span>inp_arr<span class=\"token punctuation\">)<\/span> \r\n<span class=\"token keyword\">print<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token string\">\"Resultant array elements:\\n\"<\/span><span class=\"token punctuation\">,<\/span> res_arr<span class=\"token punctuation\">)<\/span> \r\n<\/code><\/pre>\n<h4>\u8f93\u51fa\uff1a<\/h4>\n<pre class=\"post-pre\"><code>Array <span class=\"token builtin\">input<\/span> elements<span class=\"token punctuation\">:<\/span>\r\n <span class=\"token punctuation\">[<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">20<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">30<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">40<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">50<\/span><span class=\"token punctuation\">]<\/span>\r\nResultant array elements<span class=\"token punctuation\">:<\/span>\r\n <span class=\"token punctuation\">[<\/span> <span class=\"token number\">2.30258509<\/span>  <span class=\"token number\">2.99573227<\/span>  <span class=\"token number\">3.40119738<\/span>  <span class=\"token number\">3.68887945<\/span>  <span class=\"token number\">3.91202301<\/span><span class=\"token punctuation\">]<\/span>\r\n<\/code><\/pre>\n<hr \/>\n<h2>\u7ed3\u8bba<\/h2>\n<p>\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5df2\u7ecf\u4e86\u89e3\u4e86 Python \u7684\u5bf9\u6570\u51fd\u6570\u7684\u5de5\u4f5c\u539f\u7406\uff0c\u5e76\u63ed\u793a\u4e86 Python \u4e2d\u5bf9\u6570\u51fd\u6570\u7684\u53d8\u4f53\u3002<\/p>\n<hr \/>\n<h2>\u53c2\u8003\u6587\u732e<\/h2>\n<ul class=\"post-ul\">\n<li><a href=\"#\">Python log function Documentation<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u8fd9\u662f\u6587\u7ae0\u300aPython\u7684log()\u51fd\u6570\u7528\u4e8e\u8ba1\u7b97\u5bf9\u6570\u300b\u7684\u7b2c1\u90e8\u5206\uff08\u51712\u90e8\u5206\uff09\u3002 \u5185\u5bb9\u7247\u6bb5: \u5bf9\u6570\u88ab\u7528\u6765\u63cf\u8ff0\u548c\u8868\u793a [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[845,32,846,847,307],"class_list":["post-219","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-log","tag-python","tag-846","tag-847","tag-307"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ 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