{"id":974447,"date":"2024-12-27T06:05:14","date_gmt":"2024-12-26T22:05:14","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/974447.html"},"modified":"2024-12-27T06:05:16","modified_gmt":"2024-12-26T22:05:16","slug":"python%e5%a6%82%e4%bd%95%e6%94%b9%e5%8f%98%e5%af%b9%e8%b1%a1%e5%b1%9e%e6%80%a7","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/974447.html","title":{"rendered":"python\u5982\u4f55\u6539\u53d8\u5bf9\u8c61\u5c5e\u6027"},"content":{"rendered":"<p style=\"text-align:center;\" ><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/24200147\/7715bcd4-7316-43f8-bac8-6c35e7a5f353.webp\" alt=\"python\u5982\u4f55\u6539\u53d8\u5bf9\u8c61\u5c5e\u6027\" \/><\/p>\n<p><p> <strong>\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u76f4\u63a5\u8bbf\u95ee\u5bf9\u8c61\u7684\u5c5e\u6027\u3001\u4f7f\u7528setter\u65b9\u6cd5\u3001\u901a\u8fc7<code>__dict__<\/code>\u5c5e\u6027\u3001\u4f7f\u7528<code>setattr()<\/code>\u51fd\u6570\u6765\u6539\u53d8\u5bf9\u8c61\u7684\u5c5e\u6027\u3002\u6700\u76f4\u63a5\u7684\u65b9\u6cd5\u662f\u76f4\u63a5\u8bbf\u95ee\u5e76\u4fee\u6539\u5c5e\u6027\u503c\uff0c\u8fd9\u79cd\u65b9\u6cd5\u7b80\u5355\u660e\u4e86\uff0c\u9002\u7528\u4e8e\u5927\u591a\u6570\u60c5\u51b5\u3002<\/strong><\/p>\n<\/p>\n<p><p>\u4e00\u3001\u76f4\u63a5\u8bbf\u95ee\u5bf9\u8c61\u7684\u5c5e\u6027<\/p>\n<\/p>\n<p><p>\u76f4\u63a5\u8bbf\u95ee\u5bf9\u8c61\u7684\u5c5e\u6027\u662fPython\u4e2d\u6700\u7b80\u5355\u548c\u5e38\u7528\u7684\u65b9\u5f0f\u3002\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u7c7b<code>Person<\/code>\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5b9e\u4f8b\u5316\u5bf9\u8c61\u5e76\u76f4\u63a5\u4fee\u6539\u5176\u5c5e\u6027\u6765\u5b9e\u73b0\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">class Person:<\/p>\n<p>    def __init__(self, name, age):<\/p>\n<p>        self.name = name<\/p>\n<p>        self.age = age<\/p>\n<p>person = Person(&quot;Alice&quot;, 30)<\/p>\n<p>person.age = 31  # \u76f4\u63a5\u4fee\u6539\u5c5e\u6027\u503c<\/p>\n<p>print(person.age)  # \u8f93\u51fa\uff1a31<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u901a\u8fc7\u76f4\u63a5\u8bbf\u95ee<code>person<\/code>\u5bf9\u8c61\u7684<code>age<\/code>\u5c5e\u6027\uff0c\u7136\u540e\u5c06\u5176\u503c\u4ece<code>30<\/code>\u6539\u4e3a<code>31<\/code>\u3002\u8fd9\u79cd\u65b9\u6cd5\u7b80\u5355\u76f4\u89c2\uff0c\u9002\u7528\u4e8e\u5927\u591a\u6570\u60c5\u51b5\u4e0b\u7684\u5c5e\u6027\u4fee\u6539\u3002<\/p>\n<\/p>\n<p><p>\u4e8c\u3001\u4f7f\u7528setter\u65b9\u6cd5<\/p>\n<\/p>\n<p><p>\u4f7f\u7528setter\u65b9\u6cd5\u53ef\u4ee5\u5728\u4fee\u6539\u5c5e\u6027\u65f6\u52a0\u5165\u4e00\u4e9b\u63a7\u5236\u903b\u8f91\uff0c\u6bd4\u5982\u9a8c\u8bc1\u6570\u636e\u6216\u89e6\u53d1\u4e8b\u4ef6\u3002\u8fd9\u79cd\u65b9\u6cd5\u66f4\u5177\u7075\u6d3b\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">class Person:<\/p>\n<p>    def __init__(self, name, age):<\/p>\n<p>        self.name = name<\/p>\n<p>        self._age = age<\/p>\n<p>    @property<\/p>\n<p>    def age(self):<\/p>\n<p>        return self._age<\/p>\n<p>    @age.setter<\/p>\n<p>    def age(self, value):<\/p>\n<p>        if value &gt;= 0:<\/p>\n<p>            self._age = value<\/p>\n<p>        else:<\/p>\n<p>            r<a href=\"https:\/\/docs.pingcode.com\/blog\/59162.html\" target=\"_blank\">AI<\/a>se ValueError(&quot;Age cannot be negative&quot;)<\/p>\n<p>person = Person(&quot;Alice&quot;, 30)<\/p>\n<p>person.age = 31  # \u4f7f\u7528setter\u65b9\u6cd5\u4fee\u6539\u5c5e\u6027<\/p>\n<p>print(person.age)  # \u8f93\u51fa\uff1a31<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u4e86<code>@property<\/code>\u88c5\u9970\u5668\u5b9a\u4e49\u4e86\u4e00\u4e2agetter\u65b9\u6cd5\uff0c\u540c\u65f6\u4f7f\u7528<code>@age.setter<\/code>\u5b9a\u4e49\u4e86\u4e00\u4e2asetter\u65b9\u6cd5\u3002\u5728\u8bbe\u7f6e<code>age<\/code>\u5c5e\u6027\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u5bf9\u4f20\u5165\u7684\u503c\u8fdb\u884c\u9a8c\u8bc1\uff0c\u786e\u4fdd\u5176\u7b26\u5408\u9884\u671f\u3002<\/p>\n<\/p>\n<p><p>\u4e09\u3001\u901a\u8fc7<code>__dict__<\/code>\u5c5e\u6027\u4fee\u6539<\/p>\n<\/p>\n<p><p>Python\u4e2d\u7684\u6bcf\u4e2a\u5bf9\u8c61\u90fd\u6709\u4e00\u4e2a\u540d\u4e3a<code>__dict__<\/code>\u7684\u5c5e\u6027\uff0c\u5b83\u662f\u4e00\u4e2a\u5b57\u5178\uff0c\u7528\u4e8e\u5b58\u50a8\u5bf9\u8c61\u7684\u5c5e\u6027\u548c\u5c5e\u6027\u503c\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4fee\u6539<code>__dict__<\/code>\u4e2d\u7684\u503c\u6765\u6539\u53d8\u5bf9\u8c61\u7684\u5c5e\u6027\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">class Person:<\/p>\n<p>    def __init__(self, name, age):<\/p>\n<p>        self.name = name<\/p>\n<p>        self.age = age<\/p>\n<p>person = Person(&quot;Alice&quot;, 30)<\/p>\n<p>person.__dict__[&#39;age&#39;] = 31  # \u901a\u8fc7__dict__\u4fee\u6539\u5c5e\u6027<\/p>\n<p>print(person.age)  # \u8f93\u51fa\uff1a31<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u8fd9\u79cd\u65b9\u6cd5\u867d\u7136\u53ef\u4ee5\u76f4\u63a5\u4fee\u6539\u5bf9\u8c61\u7684\u5c5e\u6027\uff0c\u4f46\u901a\u5e38\u4e0d\u63a8\u8350\u4f7f\u7528\uff0c\u56e0\u4e3a\u5b83\u53ef\u80fd\u7834\u574f\u5c01\u88c5\u6027\u548c\u7c7b\u7684\u8bbe\u8ba1\u610f\u56fe\u3002<\/p>\n<\/p>\n<p><p>\u56db\u3001\u4f7f\u7528<code>setattr()<\/code>\u51fd\u6570<\/p>\n<\/p>\n<p><p><code>setattr()<\/code>\u662fPython\u5185\u7f6e\u51fd\u6570\uff0c\u7528\u4e8e\u52a8\u6001\u5730\u8bbe\u7f6e\u5bf9\u8c61\u7684\u5c5e\u6027\u3002\u5b83\u63a5\u53d7\u4e09\u4e2a\u53c2\u6570\uff1a\u5bf9\u8c61\u3001\u5c5e\u6027\u540d\u548c\u65b0\u7684\u5c5e\u6027\u503c\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">class Person:<\/p>\n<p>    def __init__(self, name, age):<\/p>\n<p>        self.name = name<\/p>\n<p>        self.age = age<\/p>\n<p>person = Person(&quot;Alice&quot;, 30)<\/p>\n<p>setattr(person, &#39;age&#39;, 31)  # \u4f7f\u7528setattr\u4fee\u6539\u5c5e\u6027<\/p>\n<p>print(person.age)  # \u8f93\u51fa\uff1a31<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u4f7f\u7528<code>setattr()<\/code>\u7684\u4f18\u52bf\u5728\u4e8e\u53ef\u4ee5\u52a8\u6001\u5730\u4fee\u6539\u5c5e\u6027\uff0c\u5c24\u5176\u662f\u5728\u5c5e\u6027\u540d\u5728\u8fd0\u884c\u65f6\u624d\u786e\u5b9a\u7684\u60c5\u51b5\u4e0b\u3002<\/p>\n<\/p>\n<p><p>\u4e94\u3001\u603b\u7ed3\u4e0e\u6700\u4f73\u5b9e\u8df5<\/p>\n<\/p>\n<p><p>\u5728Python\u4e2d\uff0c\u6709\u591a\u79cd\u65b9\u5f0f\u53ef\u4ee5\u4fee\u6539\u5bf9\u8c61\u7684\u5c5e\u6027\uff0c\u6bcf\u79cd\u65b9\u5f0f\u90fd\u6709\u5176\u9002\u7528\u7684\u573a\u666f\u548c\u4f18\u7f3a\u70b9\u3002\u5bf9\u4e8e\u5927\u591a\u6570\u60c5\u51b5\uff0c\u76f4\u63a5\u8bbf\u95ee\u5c5e\u6027\u662f\u6700\u7b80\u5355\u548c\u76f4\u89c2\u7684\u65b9\u6cd5\u3002\u7136\u800c\uff0c\u5f53\u9700\u8981\u5728\u4fee\u6539\u5c5e\u6027\u65f6\u8fdb\u884c\u989d\u5916\u7684\u9a8c\u8bc1\u6216\u903b\u8f91\u5904\u7406\u65f6\uff0c\u4f7f\u7528setter\u65b9\u6cd5\u4f1a\u66f4\u5408\u9002\u3002\u6b64\u5916\uff0c<code>setattr()<\/code>\u51fd\u6570\u63d0\u4f9b\u4e86\u5728\u8fd0\u884c\u65f6\u52a8\u6001\u4fee\u6539\u5c5e\u6027\u7684\u7075\u6d3b\u6027\u3002<\/p>\n<\/p>\n<p><p>\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u6211\u4eec\u5e94\u8be5\u6839\u636e\u5177\u4f53\u7684\u9700\u6c42\u548c\u4e0a\u4e0b\u6587\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u3002\u5728\u8bbe\u8ba1\u7c7b\u65f6\uff0c\u5c3d\u91cf\u4fdd\u6301\u5c5e\u6027\u7684\u5c01\u88c5\u6027\uff0c\u907f\u514d\u76f4\u63a5\u64cd\u4f5c<code>__dict__<\/code>\u5c5e\u6027\uff0c\u4ee5\u786e\u4fdd\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027\u548c\u53ef\u8bfb\u6027\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p> <strong>\u5982\u4f55\u5728Python\u4e2d\u52a8\u6001\u6dfb\u52a0\u5bf9\u8c61\u5c5e\u6027\uff1f<\/strong><br \/>\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u7b80\u5355\u7684\u8d4b\u503c\u8bed\u53e5\u6765\u52a8\u6001\u6dfb\u52a0\u5bf9\u8c61\u5c5e\u6027\u3002\u4f8b\u5982\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528<code>obj.new_attribute = value<\/code>\u7684\u65b9\u5f0f\u76f4\u63a5\u4e3a\u5bf9\u8c61<code>obj<\/code>\u6dfb\u52a0\u4e00\u4e2a\u65b0\u7684\u5c5e\u6027<code>new_attribute<\/code>\uff0c\u5e76\u8d4b\u4e88\u5b83\u4e00\u4e2a\u503c\u3002\u8fd9\u79cd\u7075\u6d3b\u6027\u4f7f\u5f97Python\u975e\u5e38\u9002\u5408\u5feb\u901f\u5f00\u53d1\u548c\u539f\u578b\u8bbe\u8ba1\u3002<\/p>\n<p><strong>\u5982\u4f55\u4f7f\u7528Python\u4e2d\u7684getter\u548csetter\u65b9\u6cd5\uff1f<\/strong><br \/>\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u5b9a\u4e49\u7c7b\u7684<code>@property<\/code>\u88c5\u9970\u5668\u6765\u5b9e\u73b0getter\u65b9\u6cd5\uff0c\u800c\u4f7f\u7528<code>@property_name.setter<\/code>\u88c5\u9970\u5668\u6765\u5b9e\u73b0setter\u65b9\u6cd5\u3002\u8fd9\u6837\u53ef\u4ee5\u5728\u8bbf\u95ee\u6216\u4fee\u6539\u5c5e\u6027\u65f6\u6dfb\u52a0\u989d\u5916\u7684\u903b\u8f91\uff0c\u6bd4\u5982\u6570\u636e\u9a8c\u8bc1\u6216\u683c\u5f0f\u5316\u3002\u8fd9\u79cd\u65b9\u6cd5\u63d0\u4f9b\u4e86\u66f4\u597d\u7684\u5c01\u88c5\u6027\u548c\u63a7\u5236\u6027\u3002<\/p>\n<p><strong>\u5982\u4f55\u5728\u5b50\u7c7b\u4e2d\u4fee\u6539\u7236\u7c7b\u5bf9\u8c61\u7684\u5c5e\u6027\uff1f<\/strong><br \/>\u5728\u5b50\u7c7b\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u8c03\u7528<code>super()<\/code>\u51fd\u6570\u6765\u8bbf\u95ee\u548c\u4fee\u6539\u7236\u7c7b\u7684\u5c5e\u6027\u3002\u4f8b\u5982\uff0c\u4f7f\u7528<code>super().__init__()<\/code>\u6765\u521d\u59cb\u5316\u7236\u7c7b\u7684\u5c5e\u6027\u540e\uff0c\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528<code>self.parent_attribute = new_value<\/code>\u6765\u6539\u53d8\u7236\u7c7b\u4e2d\u7684\u5c5e\u6027\u3002\u8fd9\u4f7f\u5f97\u5b50\u7c7b\u80fd\u591f\u6709\u6548\u5730\u7ee7\u627f\u5e76\u6269\u5c55\u7236\u7c7b\u7684\u529f\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u76f4\u63a5\u8bbf\u95ee\u5bf9\u8c61\u7684\u5c5e\u6027\u3001\u4f7f\u7528setter\u65b9\u6cd5\u3001\u901a\u8fc7__dict__\u5c5e\u6027\u3001\u4f7f\u7528setatt [&hellip;]","protected":false},"author":3,"featured_media":974459,"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\/974447"}],"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=974447"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/974447\/revisions"}],"predecessor-version":[{"id":974460,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/974447\/revisions\/974460"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/974459"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=974447"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=974447"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=974447"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}