<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[饭饭童鞋的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/continuing1234</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; continuing1234]]></copyright><item><title><![CDATA[TypeError: Request url must be str or unicode, got Selector]]></title><link>https://blog.youkuaiyun.com/continuing1234/article/details/130141733</link><guid>https://blog.youkuaiyun.com/continuing1234/article/details/130141733</guid><author>continuing1234</author><pubDate>Thu, 13 Apr 2023 22:26:21 +0800</pubDate><description><![CDATA[使用scrapy进行爬虫时出现如下报错：TypeError: Request url must be str or unicode, got Selector的解决方法]]></description><category></category></item><item><title><![CDATA[事务、数据备份与恢复]]></title><link>https://blog.youkuaiyun.com/continuing1234/article/details/128645110</link><guid>https://blog.youkuaiyun.com/continuing1234/article/details/128645110</guid><author>continuing1234</author><pubDate>Wed, 11 Jan 2023 15:54:28 +0800</pubDate><description><![CDATA[事务的特性：原子性；一致性；隔离性；持久性]]></description><category></category></item><item><title><![CDATA[刷题随记2]]></title><link>https://blog.youkuaiyun.com/continuing1234/article/details/126875632</link><guid>https://blog.youkuaiyun.com/continuing1234/article/details/126875632</guid><author>continuing1234</author><pubDate>Tue, 20 Dec 2022 19:30:44 +0800</pubDate><description><![CDATA[sorted和sort的区别：
（1）sort函数没有返回值，会改变原元素的值；sorted函数有返回值，不会改变原元素的值。
（2）sort()一般作用于列表；sorted()作用于任意可迭代的对象。
（3）sort使用方法为ls.sort()，而sorted使用方法为sorted(ls)。]]></description><category></category></item><item><title><![CDATA[操作系统的接口]]></title><link>https://blog.youkuaiyun.com/continuing1234/article/details/128120681</link><guid>https://blog.youkuaiyun.com/continuing1234/article/details/128120681</guid><author>continuing1234</author><pubDate>Wed, 30 Nov 2022 20:00:25 +0800</pubDate><description><![CDATA[操作系统接口分类：命令接口、图形接口、程序接口]]></description><category></category></item><item><title><![CDATA[操作系统的特征和性能指标]]></title><link>https://blog.youkuaiyun.com/continuing1234/article/details/127538741</link><guid>https://blog.youkuaiyun.com/continuing1234/article/details/127538741</guid><author>continuing1234</author><pubDate>Wed, 26 Oct 2022 19:37:01 +0800</pubDate><description><![CDATA[操作系统特征：共享性、并发性、虚拟性、异步性
性能指标：可靠性、吞吐量、响应时间、资源利用率、可移植性 
]]></description><category></category></item><item><title><![CDATA[操作系统的分类]]></title><link>https://blog.youkuaiyun.com/continuing1234/article/details/127136333</link><guid>https://blog.youkuaiyun.com/continuing1234/article/details/127136333</guid><author>continuing1234</author><pubDate>Sat, 01 Oct 2022 19:02:06 +0800</pubDate><description><![CDATA[操作系统的分类—— 四个大类：单用户OS、多道批处理OS、分时OS、实时OS]]></description><category></category></item><item><title><![CDATA[操作系统基本概述]]></title><link>https://blog.youkuaiyun.com/continuing1234/article/details/127035512</link><guid>https://blog.youkuaiyun.com/continuing1234/article/details/127035512</guid><author>continuing1234</author><pubDate>Sun, 25 Sep 2022 11:13:40 +0800</pubDate><description><![CDATA[从资源管理的角度看操作系统的五大功能：存储器管理、处理器管理、设备管理、用户接口、文件管理]]></description><category></category></item><item><title><![CDATA[操作系统的发展过程的三个阶段]]></title><link>https://blog.youkuaiyun.com/continuing1234/article/details/126296830</link><guid>https://blog.youkuaiyun.com/continuing1234/article/details/126296830</guid><author>continuing1234</author><pubDate>Fri, 12 Aug 2022 09:24:21 +0800</pubDate><description><![CDATA[操作系统的发展过程——三个阶段：人工操作阶段、早期批处理阶段、多道程序设计阶段]]></description><category></category></item><item><title><![CDATA[刷题知识点随记]]></title><link>https://blog.youkuaiyun.com/continuing1234/article/details/124011384</link><guid>https://blog.youkuaiyun.com/continuing1234/article/details/124011384</guid><author>continuing1234</author><pubDate>Mon, 18 Jul 2022 11:42:46 +0800</pubDate><description><![CDATA[VLOOKUP的使用方法
VLOOKUP(要查找的值，查找的区域，查找区域返回的列，查找模式)
第4个参数，查找模式：0表示精确匹配，1表示模糊匹配
比如查询当前用户id的性别：
VLOOKUP(用户id,A2:C6,性别,1)
]]></description><category></category></item><item><title><![CDATA[使用pytesseract库进行图片文字识别报错]]></title><link>https://blog.youkuaiyun.com/continuing1234/article/details/125203127</link><guid>https://blog.youkuaiyun.com/continuing1234/article/details/125203127</guid><author>continuing1234</author><pubDate>Sun, 12 Jun 2022 16:04:34 +0800</pubDate><description><![CDATA[pytesseract.pytesseract.TesseractError: (1, 'Error opening data file D:\\pycharm2019\\tesseract-ocr/chi_sim.traineddata Please make sure the TESSDATA_PREFIX environment variable is set to your "tessdata" directory. Failed loading language \'chi_sim\' Tesse]]></description><category></category></item><item><title><![CDATA[使用py2neo创建知识图谱报错The following settings are not supported:{‘http_port‘:7474}]]></title><link>https://blog.youkuaiyun.com/continuing1234/article/details/124525976</link><guid>https://blog.youkuaiyun.com/continuing1234/article/details/124525976</guid><author>continuing1234</author><pubDate>Sun, 01 May 2022 22:21:49 +0800</pubDate><description><![CDATA[The following settings are not supported:{'http_port':7474}]]></description><category></category></item><item><title><![CDATA[pycharm安装pytesseract，进行图片文字识别]]></title><link>https://blog.youkuaiyun.com/continuing1234/article/details/124231528</link><guid>https://blog.youkuaiyun.com/continuing1234/article/details/124231528</guid><author>continuing1234</author><pubDate>Sun, 17 Apr 2022 17:36:23 +0800</pubDate><description><![CDATA[今天使用pytesseract包进行自动化验证登录时，对pytesseract进行下载，其中出现了很多的问题，我直接先使用命令：pip install pytesseract进行下载，下载成功

然后测试看看能不能识别出图片中的文字，然后报错

查阅了资料发现还要安装pillow和Tesseract-OCR
下载Tesseract-OCR链接：https://digi.bib.uni-mannheim.de/tesseract/tesseract-ocr-setup-4.00.00dev.exe
然后一路默]]></description><category></category></item><item><title><![CDATA[neobolt.exceptions.ServiceUnavailable: Failed to establish connection to (‘某主机ip‘, 7687)]]></title><link>https://blog.youkuaiyun.com/continuing1234/article/details/123722425</link><guid>https://blog.youkuaiyun.com/continuing1234/article/details/123722425</guid><author>continuing1234</author><pubDate>Thu, 24 Mar 2022 22:25:50 +0800</pubDate><description><![CDATA[neobolt.exceptions.ServiceUnavailable: Failed to establish connection to ('某主机ip', 7687) (reason [WinError 10061] 由于目标计算机积极拒绝，无法连接。)]]></description><category></category></item><item><title><![CDATA[Mysql编程基础与触发器]]></title><link>https://blog.youkuaiyun.com/continuing1234/article/details/123514222</link><guid>https://blog.youkuaiyun.com/continuing1234/article/details/123514222</guid><author>continuing1234</author><pubDate>Tue, 15 Mar 2022 22:41:45 +0800</pubDate><description><![CDATA[一、Mysql编程基础
1.标识符
以“＠”开头的标识符表示一个局部变量或是一个函数的参数
以“＠＠”开头的标识符表示一个全局变量。
2.注释
单行注释：#开始事务
多行注释：/*不能从数据库中删除拥有安全对象的用户 */
3.常量与变量
常量也称为文字值或标量值，是指程序运行中值始终不改的量。
变量就是在程序执行过程中，其值是可以改变的量。
在MySQL系统中，存在两种类型的变量：一种是系统定义和维护的全局变量；另一种是局部变量。
1）系统全局变量
系统全局变量是MySQL系统提供并赋值的变量。全局变量以]]></description><category></category></item><item><title><![CDATA[数据库学习之视图管理]]></title><link>https://blog.youkuaiyun.com/continuing1234/article/details/123091073</link><guid>https://blog.youkuaiyun.com/continuing1234/article/details/123091073</guid><author>continuing1234</author><pubDate>Wed, 23 Feb 2022 15:47:47 +0800</pubDate><description><![CDATA[一、视图的特点

虚表，是从一个或几个基本表（或视图）导出的表，既重新创建的表+查询语句，其实也是看得见的表。
即存放视图的定义，也存放视图对应的数据
基本表中的数据发生变化，从视图中查询出的数据也随之改变

二、创建视图
1、语句格式：
CREATE  VIEW 
    &lt;视图名&gt;  [(&lt;列名&gt;  [,&lt;列名&gt;]…)]
AS  &lt;子查询&gt;
[WITH  CHECK  OPTION];

WITH CHECK OPTION是对视图进行UPDATE，INSE]]></description><category></category></item><item><title><![CDATA[python将dict数据写入json文件中]]></title><link>https://blog.youkuaiyun.com/continuing1234/article/details/122555075</link><guid>https://blog.youkuaiyun.com/continuing1234/article/details/122555075</guid><author>continuing1234</author><pubDate>Tue, 18 Jan 2022 10:49:05 +0800</pubDate><description><![CDATA[现在获取一个医药网站的数据，最终转换成dict类型，需要将数据写入JSON文件中，以方便后面数据的使用
with open('./medical.json', 'w',encoding='utf-8') as fp:
   json.dump(data, fp)

但得到的最终数据却是这样：

本来应该是正常的中文字符串，却是ASCII编码，因此在dump方法中添加一个ensure_ascii参数，原因是dump()方法将字典转化为字符串，会默认将其中unicode码以ascii编码的方式输入到字符串中
w]]></description><category></category></item><item><title><![CDATA[DeprecationWarning: use options instead of chrome_options driver = webdriver.Chrome(path, chrome_o]]></title><link>https://blog.youkuaiyun.com/continuing1234/article/details/122336366</link><guid>https://blog.youkuaiyun.com/continuing1234/article/details/122336366</guid><author>continuing1234</author><pubDate>Thu, 06 Jan 2022 09:15:05 +0800</pubDate><description><![CDATA[使用selenium进行获取一些数据时，运行时一直报警告：‘DeprecationWarning: use options instead of chrome_options driver = webdriver.Chrome(path, chrome_options=option)’

虽然不是个错误，但还是解决一下，可能是参数进行了替换吧，将chrome_options变成options就行了

...]]></description><category></category></item><item><title><![CDATA[1054, “Unknown column ‘pname‘ in ‘field list‘“]]></title><link>https://blog.youkuaiyun.com/continuing1234/article/details/122246772</link><guid>https://blog.youkuaiyun.com/continuing1234/article/details/122246772</guid><author>continuing1234</author><pubDate>Thu, 30 Dec 2021 22:36:49 +0800</pubDate><description><![CDATA[1054, "Unknown column 'pname' in 'field list'"]]></description><category></category></item><item><title><![CDATA[not all arguments converted during string formatting]]></title><link>https://blog.youkuaiyun.com/continuing1234/article/details/122208727</link><guid>https://blog.youkuaiyun.com/continuing1234/article/details/122208727</guid><author>continuing1234</author><pubDate>Wed, 29 Dec 2021 09:36:59 +0800</pubDate><description><![CDATA[在使用python将获取的数据存入mysql中时，一直报错

后来发现是自己写sql的插入数据语句出现了问题，前面的需要的参数数量和后面%s格式化数量不一致，只需要写一致就可以啦

]]></description><category></category></item><item><title><![CDATA[TypeError: can only concatenate str (not “module“) to str]]></title><link>https://blog.youkuaiyun.com/continuing1234/article/details/122148265</link><guid>https://blog.youkuaiyun.com/continuing1234/article/details/122148265</guid><author>continuing1234</author><pubDate>Sat, 25 Dec 2021 20:34:08 +0800</pubDate><description><![CDATA[在使用python进行数据爬取时，直接将需要的字段进行合并，然鹅出现了以下的错误

因为只能连接str到str，所以将字段类型转换成str类型就行了

]]></description><category></category></item></channel></rss>