{"provider_name":"Hatena Blog","title":"\u8f9e\u66f8\u306eget\u3068setdefault","image_url":null,"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fpylet.hatenadiary.org%2Fentry%2F20080416%2Fsetdefault\" title=\"\u8f9e\u66f8\u306eget\u3068setdefault - pylet\u306e\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","type":"rich","published":"2008-04-16 00:00:00","blog_url":"https://pylet.hatenadiary.org/","description":"\u8f9e\u66f8\u306b\u5b58\u5728\u3057\u306a\u3044\u30ad\u30fc\u3092\u666e\u901a\u306b[]\u3067\u53c2\u7167\u3059\u308b\u3068KeyError\u306b\u306a\u308a\u307e\u3059\u3002 >>> d = {} >>> d['foo'] Traceback (most recent call last): File \"<stdin>\", line 1, in <module> KeyError: 'foo'd.get()\u3092\u4f7f\u3046\u3068\u3001\u30ad\u30fc\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306b\u8fd4\u5374\u3059\u308b\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u6307\u5b9a\u3067\u304d\u307e\u3059\u3002\u304c\u3001d\u306e\u4e2d\u81ea\u4f53\u306f\u5909\u66f4\u3057\u307e\u305b\u3093\u3002 d.setdefault()\u3092\u4f7f\u3046\u3068\u3001\u30ad\u30fc\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u8fd4\u5374\u3057\u3001\u304b\u3064d\u306e\u4e2d\u3082\u5909\u66f4\u3057\u3066\u304f\u308c\u307e\u3059\u3002 >>> d.get('foo', 'bar') 'bar' >>> d {} \u2026","author_name":"pylet","provider_url":"https://hatena.blog","version":"1.0","height":"190","categories":[],"url":"https://pylet.hatenadiary.org/entry/20080416/setdefault","author_url":"https://blog.hatena.ne.jp/pylet/","width":"100%","blog_title":"pylet\u306e\u65e5\u8a18"}