{"id":592,"date":"2024-11-20T23:25:58","date_gmt":"2024-11-20T15:25:58","guid":{"rendered":"http:\/\/www.chan.ink\/?p=592"},"modified":"2024-11-20T23:26:02","modified_gmt":"2024-11-20T15:26:02","slug":"%e3%80%90python%e3%80%91dict-getmobile_phone-%e5%92%8c-dictmobile_phone-%e7%9a%84%e5%8c%ba%e5%88%ab","status":"publish","type":"post","link":"http:\/\/www.chan.ink\/index.php\/2024\/11\/20\/%e3%80%90python%e3%80%91dict-getmobile_phone-%e5%92%8c-dictmobile_phone-%e7%9a%84%e5%8c%ba%e5%88%ab\/","title":{"rendered":"\u3010Python\u3011dict.get(&#8216;mobile_phone&#8217;) \u548c dict[&#8216;mobile_phone&#8217;] \u7684\u533a\u522b"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">mobile_phone = self.cleaned_data.get(&#8216;mobile_phone&#8217;)\u4e0e mobile_phone = self.cleaned_data[&#8216;mobile_phone&#8217;]\u6709\u4f55\u533a\u522b<\/p>\n\n\n\n<h6 class=\"wp-block-heading\">ChatGPT \u8bf4\uff1a<\/h6>\n\n\n\n<p class=\"wp-block-paragraph\"><code>self.cleaned_data.get('mobile_phone')<\/code> \u548c <code>self.cleaned_data['mobile_phone']<\/code> \u7684\u533a\u522b\u4e3b\u8981\u5728\u4e8e\u5b83\u4eec\u5728\u5b57\u5178\u64cd\u4f5c\u4e2d\u7684\u5bb9\u9519\u6027\u4e0d\u540c\u3002\u5177\u4f53\u5982\u4e0b\uff1a<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. <strong><code>self.cleaned_data.get('mobile_phone')<\/code><\/strong><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u7279\u70b9\uff1a<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f7f\u7528\u7684\u662f\u5b57\u5178\u7684 <code>get()<\/code> \u65b9\u6cd5\u3002<\/li>\n\n\n\n<li><strong>\u5b89\u5168\u6027\u66f4\u9ad8<\/strong>\uff1a\u5f53\u952e <code>'mobile_phone'<\/code> \u4e0d\u5b58\u5728\u65f6\uff0c\u4e0d\u4f1a\u629b\u51fa\u5f02\u5e38\uff0c\u800c\u662f\u8fd4\u56de <code>None<\/code> \u6216\u4e00\u4e2a\u6307\u5b9a\u7684\u9ed8\u8ba4\u503c\uff08\u5982\u679c\u63d0\u4f9b\u4e86\uff09\u3002<\/li>\n\n\n\n<li>\u53ef\u4ee5\u4e3a\u8fd4\u56de\u503c\u8bbe\u7f6e\u9ed8\u8ba4\u503c\uff0c\u5982\uff1apython\u590d\u5236\u4ee3\u7801<code>mobile_phone = self.cleaned_data.get('mobile_phone', 'default_value')<\/code><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u7528\u9014\uff1a<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5e38\u7528\u4e8e\u4e0d\u786e\u5b9a\u952e\u662f\u5426\u5b58\u5728\u7684\u60c5\u51b5\u4e0b\uff0c\u4f8b\u5982\u5728\u5904\u7406\u8868\u5355\u6570\u636e\u65f6\uff0c\u67d0\u4e9b\u5b57\u6bb5\u53ef\u80fd\u662f\u53ef\u9009\u7684\u3002<\/li>\n\n\n\n<li>\u907f\u514d\u56e0\u4e3a\u7f3a\u5c11\u67d0\u4e2a\u952e\u800c\u5bfc\u81f4\u4ee3\u7801\u62a5\u9519\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u793a\u4f8b\uff1a<\/h4>\n\n\n\n<pre class=\"wp-block-preformatted\">python\u590d\u5236\u4ee3\u7801<code>self.cleaned_data = {'email': 'user@example.com'}\n\n# \u4f7f\u7528 get()\uff0c\u5982\u679c 'mobile_phone' \u4e0d\u5b58\u5728\uff0c\u8fd4\u56de None\nmobile_phone = self.cleaned_data.get('mobile_phone')  # \u8fd4\u56de None\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">2. <strong><code>self.cleaned_data['mobile_phone']<\/code><\/strong><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u7279\u70b9\uff1a<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f7f\u7528\u7684\u662f\u5b57\u5178\u7684\u952e\u8bbf\u95ee\u64cd\u4f5c\u3002<\/li>\n\n\n\n<li><strong>\u4e25\u683c\u6027\u66f4\u9ad8<\/strong>\uff1a\u5f53\u952e <code>'mobile_phone'<\/code> \u4e0d\u5b58\u5728\u65f6\uff0c\u4f1a\u629b\u51fa <code>KeyError<\/code> \u5f02\u5e38\u3002<\/li>\n\n\n\n<li>\u5982\u679c\u4f60\u786e\u4fe1 <code>'mobile_phone'<\/code> \u4e00\u5b9a\u5b58\u5728\uff0c\u53ef\u4ee5\u4f7f\u7528\u8fd9\u79cd\u65b9\u5f0f\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u7528\u9014\uff1a<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5e38\u7528\u4e8e\u6570\u636e\u5b8c\u6574\u6027\u5f97\u5230\u4fdd\u969c\u7684\u573a\u666f\uff0c\u4f8b\u5982\uff0c\u5b57\u6bb5\u662f\u8868\u5355\u7684\u5fc5\u586b\u9879\u6216\u8005\u7ecf\u8fc7\u9a8c\u8bc1\u4e00\u5b9a\u5b58\u5728\u7684\u60c5\u51b5\u4e0b\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u793a\u4f8b\uff1a<\/h4>\n\n\n\n<pre class=\"wp-block-preformatted\">python\u590d\u5236\u4ee3\u7801<code>self.cleaned_data = {'email': 'user@example.com'}\n\n# \u76f4\u63a5\u8bbf\u95ee\u952e 'mobile_phone'\uff0c\u5982\u679c\u4e0d\u5b58\u5728\uff0c\u629b\u51fa KeyError\nmobile_phone = self.cleaned_data['mobile_phone']  # \u629b\u51fa KeyError: 'mobile_phone'\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u9002\u7528\u573a\u666f\u6bd4\u8f83<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u64cd\u4f5c\u65b9\u5f0f<\/th><th>\u662f\u5426\u629b\u5f02\u5e38<\/th><th>\u7528\u9014\u573a\u666f<\/th><\/tr><\/thead><tbody><tr><td><code>self.cleaned_data.get('key')<\/code><\/td><td>\u4e0d\u4f1a\u629b\u5f02\u5e38<\/td><td>\u5f53\u952e\u53ef\u80fd\u4e0d\u5b58\u5728\u65f6\uff0c\u4f7f\u7528\u6b64\u65b9\u6cd5\u4ee5\u907f\u514d\u5f02\u5e38\uff0c\u540c\u65f6\u53ef\u4ee5\u8bbe\u7f6e\u9ed8\u8ba4\u503c\u3002<\/td><\/tr><tr><td><code>self.cleaned_data['key']<\/code><\/td><td>\u4f1a\u629b\u5f02\u5e38<\/td><td>\u5982\u679c\u786e\u4fdd\u952e\u4e00\u5b9a\u5b58\u5728\uff08\u4f8b\u5982\u8868\u5355\u5b57\u6bb5\u9a8c\u8bc1\u5df2\u7ecf\u786e\u4fdd\u4e86\u5176\u5b58\u5728\uff09\uff0c\u4f7f\u7528\u6b64\u65b9\u6cd5\u53ef\u4ee5\u66f4\u76f4\u63a5\u3001\u660e\u786e\u5730\u8bbf\u95ee\u503c\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u63a8\u8350\u7528\u6cd5<\/strong><\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5982\u679c\u5b57\u6bb5\u662f <strong>\u53ef\u9009\u5b57\u6bb5<\/strong>\uff0c\u4f7f\u7528 <code>.get()<\/code>\uff1apython\u590d\u5236\u4ee3\u7801<code>mobile_phone = self.cleaned_data.get('mobile_phone') # \u5982\u679c\u4e0d\u5b58\u5728\uff0c\u8fd4\u56de None<\/code><\/li>\n\n\n\n<li>\u5982\u679c\u5b57\u6bb5\u662f <strong>\u5fc5\u586b\u5b57\u6bb5<\/strong>\uff0c\u4f7f\u7528 <code>[]<\/code>\uff1apython\u590d\u5236\u4ee3\u7801<code>mobile_phone = self.cleaned_data['mobile_phone'] # \u5982\u679c\u4e0d\u5b58\u5728\uff0c\u4f1a\u629b\u51fa\u5f02\u5e38\uff0c\u63d0\u9192\u5f00\u53d1\u8005\u4fee\u590d\u95ee\u9898<\/code><\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>\u6269\u5c55\uff1aDjango \u8868\u5355\u4e2d\u7684 <code>cleaned_data<\/code><\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728 Django \u7684\u8868\u5355\u5904\u7406\u4e2d\uff0c<code>self.cleaned_data<\/code> \u662f\u4e00\u4e2a\u5305\u542b\u8868\u5355\u6e05\u7406\u540e\u6570\u636e\u7684\u5b57\u5178\u3002\u5b57\u6bb5\u662f\u5426\u5728 <code>cleaned_data<\/code> \u4e2d\uff0c\u53d6\u51b3\u4e8e\u4ee5\u4e0b\u56e0\u7d20\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5b57\u6bb5\u662f\u5426\u901a\u8fc7\u4e86\u8868\u5355\u9a8c\u8bc1\u3002<\/li>\n\n\n\n<li>\u5982\u679c\u9a8c\u8bc1\u5931\u8d25\uff0c\u8be5\u5b57\u6bb5\u4e0d\u4f1a\u51fa\u73b0\u5728 <code>cleaned_data<\/code> \u4e2d\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u56e0\u6b64\uff0c\u63a8\u8350\u5728\u5904\u7406\u975e\u5fc5\u586b\u5b57\u6bb5\u65f6\u4f7f\u7528 <code>.get()<\/code> \u65b9\u6cd5\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u5065\u58ee\u6027\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>mobile_phone = self.cleaned_data.get(&#8216;mobile_phon [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-592","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/posts\/592","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/comments?post=592"}],"version-history":[{"count":1,"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/posts\/592\/revisions"}],"predecessor-version":[{"id":593,"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/posts\/592\/revisions\/593"}],"wp:attachment":[{"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/media?parent=592"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/categories?post=592"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.chan.ink\/index.php\/wp-json\/wp\/v2\/tags?post=592"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}