<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[csdnypp的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/csdnypp</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; csdnypp]]></copyright><item><title><![CDATA[row_number 语法]]></title><link>https://blog.youkuaiyun.com/csdnypp/article/details/126744851</link><guid>https://blog.youkuaiyun.com/csdnypp/article/details/126744851</guid><author>csdnypp</author><pubDate>Wed, 07 Sep 2022 14:19:32 +0800</pubDate><description><![CDATA[row_number 语法]]></description><category></category></item><item><title><![CDATA[pandas_profiling]]></title><link>https://blog.youkuaiyun.com/csdnypp/article/details/126624788</link><guid>https://blog.youkuaiyun.com/csdnypp/article/details/126624788</guid><author>csdnypp</author><pubDate>Wed, 31 Aug 2022 15:27:58 +0800</pubDate><description><![CDATA[pandas_profiling 包]]></description><category></category></item><item><title><![CDATA[jupyter notebook报错ImportError: cannot import name ‘soft_unicode‘ from ‘markupsafe‘ 的解决办法]]></title><link>https://blog.youkuaiyun.com/csdnypp/article/details/126587520</link><guid>https://blog.youkuaiyun.com/csdnypp/article/details/126587520</guid><author>csdnypp</author><pubDate>Mon, 29 Aug 2022 16:37:56 +0800</pubDate><description><![CDATA[报错ImportError: cannot import name ‘soft_unicode‘ from ‘markupsafe‘ 的解决办法]]></description><category></category></item><item><title><![CDATA[Python在安装包时，报错拒绝访问的错误 [WinError 5]]]></title><link>https://blog.youkuaiyun.com/csdnypp/article/details/126541434</link><guid>https://blog.youkuaiyun.com/csdnypp/article/details/126541434</guid><author>csdnypp</author><pubDate>Fri, 26 Aug 2022 13:15:22 +0800</pubDate><description><![CDATA[Python在安装包时，报错拒绝访问]]></description><category></category></item><item><title><![CDATA[Anaconda安装XGBoost(pip install)]]></title><link>https://blog.youkuaiyun.com/csdnypp/article/details/126501741</link><guid>https://blog.youkuaiyun.com/csdnypp/article/details/126501741</guid><author>csdnypp</author><pubDate>Wed, 24 Aug 2022 11:53:01 +0800</pubDate><description><![CDATA[Anaconda安装XGBoost]]></description><category></category></item><item><title><![CDATA[sklearn train_test_split 中stratify参数解析]]></title><link>https://blog.youkuaiyun.com/csdnypp/article/details/126462241</link><guid>https://blog.youkuaiyun.com/csdnypp/article/details/126462241</guid><author>csdnypp</author><pubDate>Mon, 22 Aug 2022 11:23:34 +0800</pubDate><description><![CDATA[sklearn train_test_split 中stratify参数解析]]></description><category></category></item><item><title><![CDATA[No module named ‘graphviz‘（解决）]]></title><link>https://blog.youkuaiyun.com/csdnypp/article/details/126420715</link><guid>https://blog.youkuaiyun.com/csdnypp/article/details/126420715</guid><author>csdnypp</author><pubDate>Fri, 19 Aug 2022 11:04:28 +0800</pubDate><description><![CDATA[No module named 'graphviz']]></description><category></category></item><item><title><![CDATA[win10找不到gpedit.msc怎么办]]></title><link>https://blog.youkuaiyun.com/csdnypp/article/details/106209210</link><guid>https://blog.youkuaiyun.com/csdnypp/article/details/106209210</guid><author>csdnypp</author><pubDate>Tue, 19 May 2020 10:38:49 +0800</pubDate><description><![CDATA[win10找不到gpedit.msc是因为win10系统是家庭版。

大家都认为，Windows家庭版中并不包含组策略，其实不然，它是有相关文件的，只是不让你使用而已。那么我们让系统允许你使用就好了。首先你需要在桌面上新建一个txt文本文档。然后将以下代码复制到这个新建的txt文本文档中。


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			@echooff

			pushd"%~dp0"

			dir/bC:\Windows\servicing\Pa...]]></description><category></category></item><item><title><![CDATA[iOS 各种设备ID]]></title><link>https://blog.youkuaiyun.com/csdnypp/article/details/105529993</link><guid>https://blog.youkuaiyun.com/csdnypp/article/details/105529993</guid><author>csdnypp</author><pubDate>Wed, 15 Apr 2020 10:51:04 +0800</pubDate><description><![CDATA[1.mac地址

在苹果新发布的iOS7上，如果请求Mac地址都会返回一个固定值02:00:00:00:00:00，跟UDID一样相当于被禁用。 所以Mac Address 是不能够被使用为获取设备唯一标识的。

2.IDFA

在同一个设备上的所有App都会取到相同的值。但是有几种情况下，会重新生成广告标示符。

(1)如果用户完全重置系统（(设置程序 -&gt; 通用 -&gt; 还原 -&g...]]></description><category></category></item><item><title><![CDATA[sql中的left join以及on、where关键字的区别]]></title><link>https://blog.youkuaiyun.com/csdnypp/article/details/105506453</link><guid>https://blog.youkuaiyun.com/csdnypp/article/details/105506453</guid><author>csdnypp</author><pubDate>Tue, 14 Apr 2020 10:29:51 +0800</pubDate><description><![CDATA[sql中的left join以及on、where关键字的区别

创建两张表并插入一些数据




create table class(
  class_id int,
  class_name varchar(20),
  class_grade char(1)
);
 
insert into class values (1,'语文','A');
insert into class value...]]></description><category></category></item><item><title><![CDATA[python中安装包出现Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None))…………]]></title><link>https://blog.youkuaiyun.com/csdnypp/article/details/103971456</link><guid>https://blog.youkuaiyun.com/csdnypp/article/details/103971456</guid><author>csdnypp</author><pubDate>Tue, 14 Jan 2020 13:21:03 +0800</pubDate><description><![CDATA[问题：

安装包出现Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ConnectTimeoutError

解决办法：

pip install selectivesearch -i http://pypi.douban.com/s...]]></description><category></category></item><item><title><![CDATA[sql 单表distinct/多表group by查询去除重复记录]]></title><link>https://blog.youkuaiyun.com/csdnypp/article/details/99675478</link><guid>https://blog.youkuaiyun.com/csdnypp/article/details/99675478</guid><author>csdnypp</author><pubDate>Fri, 16 Aug 2019 12:04:10 +0800</pubDate><description><![CDATA[单表distinct 多表group by

group by 必须放在 order by 和 limit之前，不然会报错



在使用mysql时，有时需要查询出某个字段不重复的记录，虽然mysql提供有distinct这个关键字来过滤掉多余的重复记录只保留一条，但往往只用它来返回不重复记录的条数，而不是用它来返回不重记录的所有值。其原因是distinct只能返回它的目标字段，而无法返回其它字...]]></description><category></category></item><item><title><![CDATA[sql 查询数据库中某表的所有字段及字段类型、属性等]]></title><link>https://blog.youkuaiyun.com/csdnypp/article/details/98848700</link><guid>https://blog.youkuaiyun.com/csdnypp/article/details/98848700</guid><author>csdnypp</author><pubDate>Thu, 08 Aug 2019 10:25:27 +0800</pubDate><description><![CDATA[SELECT column_name,column_type,IS_NULLABLE,column_key FROM information_schema.columns WHERE
table_schema= '数据库名' AND table_name = '表名'




]]></description><category></category></item><item><title><![CDATA[pandas 读取csv文件]]></title><link>https://blog.youkuaiyun.com/csdnypp/article/details/95048995</link><guid>https://blog.youkuaiyun.com/csdnypp/article/details/95048995</guid><author>csdnypp</author><pubDate>Mon, 08 Jul 2019 11:20:14 +0800</pubDate><description><![CDATA[今天开始研究pandas数据分析，文件读取时出现问题
通过os.getcwd可查询目前工作目录，将result.csv文件放入目录后可以解决。
但如果文件不在这个目录又如何？
直接调用文件路径出问题，因为Windows系统目录命名方式是‘c:\\users\...’
但是python中，\t,\n这些字符是有其他含义的，因此用‘c:/users/...’的形式来命名。
结果依旧不...]]></description><category></category></item><item><title><![CDATA[ZERO to 100]]></title><link>https://blog.youkuaiyun.com/csdnypp/article/details/50395411</link><guid>https://blog.youkuaiyun.com/csdnypp/article/details/50395411</guid><author>csdnypp</author><pubDate>Thu, 24 Dec 2015 16:39:30 +0800</pubDate><description><![CDATA[2015即将过去，一年的经历感慨良多。考虑转型，希望自己以后能成为一名合格的程序员，但基础太差，路还很长。和盼聊过，她是支持我把自己的经历在博客中记录下来的，而我，总是推脱，也许只是因为自己学的太少没有什么可以写的吧。既往不恋，当下不杂，未来不迎。错过了很多，就在新年里重新给自己一次开始的机会吧，相信自己原创百篇博客时，也会有所收获。不管怎么说，情况在变好，2016，给自己加油！]]></description><category></category></item></channel></rss>