{"id":51883,"date":"2025-08-11T08:34:16","date_gmt":"2025-08-11T00:34:16","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/51883.html"},"modified":"2025-08-11T08:34:16","modified_gmt":"2025-08-11T00:34:16","slug":"python%e4%b9%8b%e9%ad%94%e6%9c%af%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/51883.html","title":{"rendered":"Python\u4e4b\u9b54\u672f\u65b9\u6cd5"},"content":{"rendered":"<p>\u201c\u9b54\u672f\u65b9\u6cd5\u201d&#xff08;Magic Methods&#xff09;&#xff0c;\u53c8\u53eb \u7279\u6b8a\u65b9\u6cd5 \u6216 \u53cc\u4e0b\u65b9\u6cd5&#xff08;dunder methods&#xff09;&#xff0c;\u662f Python \u4e2d\u4ee5\u53cc\u4e0b\u5212\u7ebf __xxx__ \u547d\u540d\u7684\u51fd\u6570\u3002\u8fd9\u4e9b\u65b9\u6cd5\u4e0d\u662f\u4f60\u76f4\u63a5\u8c03\u7528\u7684&#xff0c;\u800c\u662f\u7531 Python \u5728\u7279\u5b9a\u64cd\u4f5c\u65f6\u81ea\u52a8\u89e6\u53d1\u7684\u3002<\/p>\n<p>\u4f8b\u5982&#xff1a;<\/p>\n<ul>\n<li>__init__ \u4f1a\u5728\u5bf9\u8c61\u521b\u5efa\u65f6\u88ab\u8c03\u7528&#xff1b;<\/li>\n<li>__str__ \u4f1a\u5728\u4f7f\u7528 print(obj) \u65f6\u8c03\u7528&#xff1b;<\/li>\n<li>__add__ \u4f1a\u5728\u4f7f\u7528 &#043; \u8fd0\u7b97\u7b26\u65f6\u8c03\u7528\u3002<\/li>\n<\/ul>\n<hr \/>\n<h3>&#x1f9e0; \u9b54\u672f\u65b9\u6cd5\u7684\u547d\u540d\u89c4\u5219<\/h3>\n<p>\u6240\u6709\u9b54\u672f\u65b9\u6cd5\u90fd\u9075\u5faa\u8fd9\u6837\u7684\u547d\u540d\u683c\u5f0f&#xff1a;<\/p>\n<p>__\u65b9\u6cd5\u540d__  &#xff08;\u6ce8\u610f\u524d\u540e\u90fd\u6709\u4e24\u4e2a\u4e0b\u5212\u7ebf&#xff09;<\/p>\n<p>\u4f60\u81ea\u5df1\u4e0d\u8981\u521b\u5efa\u968f\u610f\u547d\u540d\u7684\u53cc\u4e0b\u65b9\u6cd5&#xff0c;\u9664\u975e\u662f\u5728\u5b9e\u73b0 Python \u7684\u7ea6\u5b9a\u63a5\u53e3\u3002<\/p>\n<hr \/>\n<h3>&#x1f9e9; \u9b54\u672f\u65b9\u6cd5\u5206\u7c7b\u603b\u89c8<\/h3>\n<h4>\u2705 1. \u5bf9\u8c61\u751f\u547d\u5468\u671f\u76f8\u5173<\/h4>\n<table>\n<tr>\u65b9\u6cd5\u540d\u7528\u9014<\/tr>\n<tbody>\n<tr>\n<td>__init__(self, &#8230;)<\/td>\n<td>\u521d\u59cb\u5316\u5bf9\u8c61&#xff08;\u6784\u9020\u51fd\u6570&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>__new__(cls, &#8230;)<\/td>\n<td>\u521b\u5efa\u5bf9\u8c61&#xff08;\u7f55\u89c1&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>__del__(self)<\/td>\n<td>\u6790\u6784\u65b9\u6cd5&#xff08;\u5bf9\u8c61\u88ab\u9500\u6bc1\u65f6&#xff09;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h4>\u2705 2. \u5b57\u7b26\u4e32\u8868\u793a\u4e0e\u6253\u5370<\/h4>\n<table>\n<tr>\u65b9\u6cd5\u540d\u8bf4\u660e<\/tr>\n<tbody>\n<tr>\n<td>__str__<\/td>\n<td>str(obj) \u6216 print(obj) \u65f6\u8c03\u7528<\/td>\n<\/tr>\n<tr>\n<td>__repr__<\/td>\n<td>repr(obj)\u3001\u63a7\u5236\u53f0\u76f4\u63a5\u8f93\u5165\u5bf9\u8c61\u65f6\u8c03\u7528<\/td>\n<\/tr>\n<tr>\n<td>__format__<\/td>\n<td>&#034;{:&gt;10}&#034;.format(obj) \u65f6\u8c03\u7528<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h4>\u2705 3. \u7b97\u672f\u8fd0\u7b97\u7b26\u91cd\u8f7d<\/h4>\n<table>\n<tr>\u65b9\u6cd5\u540d\u8fd0\u7b97\u7b26\u793a\u4f8b\u8868\u8fbe\u5f0f<\/tr>\n<tbody>\n<tr>\n<td>__add__<\/td>\n<td>&#043;<\/td>\n<td>a &#043; b<\/td>\n<\/tr>\n<tr>\n<td>__sub__<\/td>\n<td>&#8211;<\/td>\n<td>a &#8211; b<\/td>\n<\/tr>\n<tr>\n<td>__mul__<\/td>\n<td>*<\/td>\n<td>a * b<\/td>\n<\/tr>\n<tr>\n<td>__truediv__<\/td>\n<td>\/<\/td>\n<td>a \/ b<\/td>\n<\/tr>\n<tr>\n<td>__floordiv__<\/td>\n<td>\/\/<\/td>\n<td>a \/\/ b<\/td>\n<\/tr>\n<tr>\n<td>__mod__<\/td>\n<td>%<\/td>\n<td>a % b<\/td>\n<\/tr>\n<tr>\n<td>__pow__<\/td>\n<td>**<\/td>\n<td>a ** b<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h4>\u2705 4. \u6bd4\u8f83\u8fd0\u7b97\u7b26\u91cd\u8f7d<\/h4>\n<table>\n<tr>\u65b9\u6cd5\u540d\u8fd0\u7b97\u7b26\u793a\u4f8b<\/tr>\n<tbody>\n<tr>\n<td>__eq__<\/td>\n<td>&#061;&#061;<\/td>\n<td>a &#061;&#061; b<\/td>\n<\/tr>\n<tr>\n<td>__ne__<\/td>\n<td>!&#061;<\/td>\n<td>a !&#061; b<\/td>\n<\/tr>\n<tr>\n<td>__lt__<\/td>\n<td>&lt;<\/td>\n<td>a &lt; b<\/td>\n<\/tr>\n<tr>\n<td>__le__<\/td>\n<td>&lt;&#061;<\/td>\n<td>a &lt;&#061; b<\/td>\n<\/tr>\n<tr>\n<td>__gt__<\/td>\n<td>&gt;<\/td>\n<td>a &gt; b<\/td>\n<\/tr>\n<tr>\n<td>__ge__<\/td>\n<td>&gt;&#061;<\/td>\n<td>a &gt;&#061; b<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h4>\u2705 5. \u5bb9\u5668\/\u7d22\u5f15\u884c\u4e3a<\/h4>\n<table>\n<tr>\u65b9\u6cd5\u540d\u793a\u4f8b\u7528\u6cd5<\/tr>\n<tbody>\n<tr>\n<td>__len__<\/td>\n<td>len(obj)<\/td>\n<\/tr>\n<tr>\n<td>__getitem__<\/td>\n<td>obj[key]<\/td>\n<\/tr>\n<tr>\n<td>__setitem__<\/td>\n<td>obj[key] &#061; value<\/td>\n<\/tr>\n<tr>\n<td>__delitem__<\/td>\n<td>del obj[key]<\/td>\n<\/tr>\n<tr>\n<td>__iter__<\/td>\n<td>for x in obj<\/td>\n<\/tr>\n<tr>\n<td>__next__<\/td>\n<td>next(iterator)<\/td>\n<\/tr>\n<tr>\n<td>__contains__<\/td>\n<td>x in obj<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h4>\u2705 6. \u4e0a\u4e0b\u6587\u7ba1\u7406\u5668&#xff08;with&#xff09;<\/h4>\n<table>\n<tr>\u65b9\u6cd5\u540d\u7528\u9014<\/tr>\n<tbody>\n<tr>\n<td>__enter__<\/td>\n<td>\u8fdb\u5165 with \u8bed\u53e5\u5757<\/td>\n<\/tr>\n<tr>\n<td>__exit__<\/td>\n<td>\u79bb\u5f00 with \u8bed\u53e5\u5757<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h4>\u2705 7. \u53ef\u8c03\u7528\u5bf9\u8c61<\/h4>\n<table>\n<tr>\u65b9\u6cd5\u540d\u7528\u6cd5<\/tr>\n<tbody>\n<tr>\n<td>__call__<\/td>\n<td>obj() \u65f6\u8c03\u7528<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h4>\u2705 8. \u7c7b\u884c\u4e3a\u76f8\u5173<\/h4>\n<table>\n<tr>\u65b9\u6cd5\u540d\u7528\u6cd5<\/tr>\n<tbody>\n<tr>\n<td>__getattr__<\/td>\n<td>\u8bbf\u95ee\u4e0d\u5b58\u5728\u5c5e\u6027\u65f6\u89e6\u53d1<\/td>\n<\/tr>\n<tr>\n<td>__getattribute__<\/td>\n<td>\u6240\u6709\u5c5e\u6027\u8bbf\u95ee\u65f6\u89e6\u53d1&#xff08;\u8c28\u614e\u7528&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>__setattr__<\/td>\n<td>\u8bbe\u7f6e\u5c5e\u6027\u65f6\u89e6\u53d1<\/td>\n<\/tr>\n<tr>\n<td>__delattr__<\/td>\n<td>\u5220\u9664\u5c5e\u6027\u65f6\u89e6\u53d1<\/td>\n<\/tr>\n<tr>\n<td>__dir__<\/td>\n<td>dir(obj) \u65f6\u8c03\u7528<\/td>\n<\/tr>\n<tr>\n<td>__instancecheck__<\/td>\n<td>isinstance(obj, cls)<\/td>\n<\/tr>\n<tr>\n<td>__subclasscheck__<\/td>\n<td>issubclass(sub, cls)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h3>&#x1f3af; \u793a\u4f8b&#xff1a;\u81ea\u5b9a\u4e49\u7c7b\u91cd\u8f7d &#043; \u8fd0\u7b97\u7b26<\/h3>\n<p><span class=\"token keyword\">class<\/span> <span class=\"token class-name\">Point<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">def<\/span> <span class=\"token function\">__init__<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">,<\/span> x<span class=\"token punctuation\">,<\/span> y<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        self<span class=\"token punctuation\">.<\/span>x <span class=\"token operator\">&#061;<\/span> x<br \/>\n        self<span class=\"token punctuation\">.<\/span>y <span class=\"token operator\">&#061;<\/span> y<\/p>\n<p>    <span class=\"token keyword\">def<\/span> <span class=\"token function\">__add__<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">,<\/span> other<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> Point<span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">.<\/span>x <span class=\"token operator\">&#043;<\/span> other<span class=\"token punctuation\">.<\/span>x<span class=\"token punctuation\">,<\/span> self<span class=\"token punctuation\">.<\/span>y <span class=\"token operator\">&#043;<\/span> other<span class=\"token punctuation\">.<\/span>y<span class=\"token punctuation\">)<\/span><\/p>\n<p>    <span class=\"token keyword\">def<\/span> <span class=\"token function\">__str__<\/span><span class=\"token punctuation\">(<\/span>self<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token string-interpolation\"><span class=\"token string\">f&#034;(<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>self<span class=\"token punctuation\">.<\/span>x<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">, <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>self<span class=\"token punctuation\">.<\/span>y<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">)&#034;<\/span><\/span><\/p>\n<p>p1 <span class=\"token operator\">&#061;<\/span> Point<span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><br \/>\np2 <span class=\"token operator\">&#061;<\/span> Point<span class=\"token punctuation\">(<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">4<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>p1 <span class=\"token operator\">&#043;<\/span> p2<span class=\"token punctuation\">)<\/span>   <span class=\"token comment\"># \u8c03\u7528 __add__&#xff0c;\u8f93\u51fa: (4, 6)<\/span><\/p>\n<hr \/>\n<h3>\u2705 \u603b\u7ed3<\/h3>\n<table>\n<tr>\u7c7b\u578b\u5e38\u7528\u9b54\u672f\u65b9\u6cd5<\/tr>\n<tbody>\n<tr>\n<td>\u6784\u9020\/\u9500\u6bc1<\/td>\n<td>__init__, __del__<\/td>\n<\/tr>\n<tr>\n<td>\u8868\u793a<\/td>\n<td>__str__, __repr__<\/td>\n<\/tr>\n<tr>\n<td>\u8fd0\u7b97\u7b26\u91cd\u8f7d<\/td>\n<td>__add__, __eq__, \u7b49\u7b49<\/td>\n<\/tr>\n<tr>\n<td>\u5bb9\u5668\u884c\u4e3a<\/td>\n<td>__getitem__, __len__, \u7b49\u7b49<\/td>\n<\/tr>\n<tr>\n<td>\u4e0a\u4e0b\u6587\u7ba1\u7406\u5668<\/td>\n<td>__enter__, __exit__<\/td>\n<\/tr>\n<tr>\n<td>\u51fd\u6570\u6a21\u62df<\/td>\n<td>__call__<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n","protected":false},"excerpt":{"rendered":"<p>\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb15\u6b21\u3002self.x = xself.y = yreturn f&quot;(self . y } )&quot; p1 = Point(1 , 2) p2 = Point(3 , 4) print(p1 + p2) # \u8c03\u7528 __add__\uff0c\u8f93\u51fa: (4, 6)self . y } )&quot; p1 = Point(1 , 2) p2 = Point(3 , 4) print(p1 + p2) # \u8c03\u7528 __add__\uff0c\u8f93\u51fa: (4, 6)<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[81,5166],"topic":[],"class_list":["post-51883","post","type-post","status-publish","format-standard","hentry","category-server","tag-python","tag-5166"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Python\u4e4b\u9b54\u672f\u65b9\u6cd5 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/51883.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Python\u4e4b\u9b54\u672f\u65b9\u6cd5 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb15\u6b21\u3002self.x = xself.y = yreturn f&quot;(self . y } )&quot; 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