<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[nini3816的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/nini3816</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; nini3816]]></copyright><item><title><![CDATA[买硬盘注意了，别买到叠瓦盘]]></title><link>https://blog.youkuaiyun.com/nini3816/article/details/115720073</link><guid>https://blog.youkuaiyun.com/nini3816/article/details/115720073</guid><author>nini3816</author><pubDate>Thu, 15 Apr 2021 11:40:54 +0800</pubDate><description><![CDATA[本人最近买了个硬盘，买到了叠瓦，动不动就卡死。现在的厂家和商家都不标注是叠瓦的，标了就卖不出去了。

怎么分辨呢，便宜而且缓存256M的，大概率叠瓦。

终极方法，只要不在商品标题上标明是垂直的，你默认是叠瓦，哈哈
...]]></description><category></category></item><item><title><![CDATA[stack与unstack]]></title><link>https://blog.youkuaiyun.com/nini3816/article/details/113877798</link><guid>https://blog.youkuaiyun.com/nini3816/article/details/113877798</guid><author>nini3816</author><pubDate>Sat, 20 Feb 2021 10:24:40 +0800</pubDate><description><![CDATA[stack： 二维压缩为一维

unstack：一维展开为二维


stack和unstack默认操作为最内层，可以用level参数指定操作层.


stack和unstack默认旋转轴的级别将会成果结果中的最低级别（最内层）


stack转换dataframe时，若只有一层列索引则转换后的类型为series，否则为dataframe
...]]></description><category></category></item><item><title><![CDATA[转载《港股基础知识大全》]]></title><link>https://blog.youkuaiyun.com/nini3816/article/details/113859666</link><guid>https://blog.youkuaiyun.com/nini3816/article/details/113859666</guid><author>nini3816</author><pubDate>Fri, 19 Feb 2021 11:06:57 +0800</pubDate><description><![CDATA[港股基础知识大全

2020-11-0209:12:06发表评论1,643 views

港股是指在中华人民共和国香港特别行政区香港联合交易所上市的股票。香港的股票交易市场早内地一个世纪，香港股市比内地股市悠久、成熟、理性，对世界的行情反映灵敏。港股分为主板与创业板两个板块，主板的上市门槛5亿港元，创业板上市门槛1亿港元。主板的规格高于创业板、流通性也好于创业板。

港交所主要历程

1891年，香港第一家证券交易所即股票经纪协会成立，1921年香港成立了第二家证券交易所——香港证券经纪人协会，194...]]></description><category></category></item><item><title><![CDATA[Pycharm 设置每行最大字符数，免得粘贴时总是自动换行]]></title><link>https://blog.youkuaiyun.com/nini3816/article/details/113517353</link><guid>https://blog.youkuaiyun.com/nini3816/article/details/113517353</guid><author>nini3816</author><pubDate>Mon, 01 Feb 2021 14:52:31 +0800</pubDate><description><![CDATA[File/settings/editor/code style/Hard wrap at

把hard wrap at 改成你想舍得字符数，设得大一点。
]]></description><category></category></item><item><title><![CDATA[datetime的timedelta居然没有hour和 minute]]></title><link>https://blog.youkuaiyun.com/nini3816/article/details/103351182</link><guid>https://blog.youkuaiyun.com/nini3816/article/details/103351182</guid><author>nini3816</author><pubDate>Mon, 02 Dec 2019 16:30:14 +0800</pubDate><description><![CDATA[t1=datetime(2018,4,13)
t2=datetime.now()
print(type(t2-t1))
print("seconds",(t2-t1).seconds)
print("days",(t2-t1).days)
# print("hour",(t2-t1).hour)#没有hour,minute



]]></description><category></category></item><item><title><![CDATA[python pandas 清空一个DataFrame表，保留表头]]></title><link>https://blog.youkuaiyun.com/nini3816/article/details/103277891</link><guid>https://blog.youkuaiyun.com/nini3816/article/details/103277891</guid><author>nini3816</author><pubDate>Wed, 27 Nov 2019 16:16:33 +0800</pubDate><description><![CDATA[有两种写法


df=df.drop(index=df.index)
或
df.drop(df.index, inplace=True)



这两种都可以
]]></description><category></category></item><item><title><![CDATA[python 删除 DataFrame表的最后一行的正确方法]]></title><link>https://blog.youkuaiyun.com/nini3816/article/details/102939424</link><guid>https://blog.youkuaiyun.com/nini3816/article/details/102939424</guid><author>nini3816</author><pubDate>Wed, 06 Nov 2019 17:32:01 +0800</pubDate><description><![CDATA[import pandas as pd
import numpy as np
df = pd.DataFrame(np.arange(12).reshape(3,4), columns=['A', 'B', 'C', 'D'])
print("df",df)

# df.drop([-1],inplace=True)
df.drop([len(df)-1],inplace=True)
print...]]></description><category></category></item><item><title><![CDATA[python3报错Error in sitecustomize; set PYTHONVERBOSE for traceback: NameError: name 'modules_list' ...]]></title><link>https://blog.youkuaiyun.com/nini3816/article/details/102478634</link><guid>https://blog.youkuaiyun.com/nini3816/article/details/102478634</guid><author>nini3816</author><pubDate>Thu, 10 Oct 2019 12:16:06 +0800</pubDate><description><![CDATA[报错Error in sitecustomize; set PYTHONVERBOSE for traceback: NameError: name 'modules_list' is not ...



原文链接:https://www.jianshu.com/p/b1ed42918380

Error in sitecustomize; set PYTHONVERBOSE for trac...]]></description><category></category></item><item><title><![CDATA[常见符号的对应英文]]></title><link>https://blog.youkuaiyun.com/nini3816/article/details/100093130</link><guid>https://blog.youkuaiyun.com/nini3816/article/details/100093130</guid><author>nini3816</author><pubDate>Tue, 27 Aug 2019 10:11:27 +0800</pubDate><description><![CDATA[period:句号

comma：逗号

semicolon:分号

parentthesis：圆括号

exclamationpoint：感叹号

apostrophe：撇号

quotemarks：引号

hyphen:连词号

dash：中横线

brackets:中括号（方括号），易与圆括号混淆。

slash：斜杠

ellipsis:省略号/顿号

、、、、、、、、、、、、、、、、、、...]]></description><category></category></item><item><title><![CDATA[asp.net获得网站的当前目录]]></title><link>https://blog.youkuaiyun.com/nini3816/article/details/97259766</link><guid>https://blog.youkuaiyun.com/nini3816/article/details/97259766</guid><author>nini3816</author><pubDate>Thu, 25 Jul 2019 14:24:25 +0800</pubDate><description><![CDATA[string sPath = System.Web.HttpContext.Current.Request.MapPath("/");//网站根目录
    string strReadFilePath = sPath+"youfile.txt";//你的文件
]]></description><category></category></item><item><title><![CDATA[c# 模拟qt的信号和槽的例子]]></title><link>https://blog.youkuaiyun.com/nini3816/article/details/91846779</link><guid>https://blog.youkuaiyun.com/nini3816/article/details/91846779</guid><author>nini3816</author><pubDate>Thu, 13 Jun 2019 13:42:26 +0800</pubDate><description><![CDATA[用惯了qt的信号和槽，转到c#觉得很别扭。微软擅长把简单的东西设计的很复杂。不过吐吐也就习惯了。

下面的例子是一个公司里面有职员和hr,职员要加薪，发射信号给hr和公司的例子。同时用到了平行传递和向上传递信号。


using System;
using System.Collections.Generic;
using System.Text;
using System.Threading;
...]]></description><category></category></item><item><title><![CDATA[c# 使用console.writeline居然遇到阻塞]]></title><link>https://blog.youkuaiyun.com/nini3816/article/details/89562196</link><guid>https://blog.youkuaiyun.com/nini3816/article/details/89562196</guid><author>nini3816</author><pubDate>Fri, 26 Apr 2019 17:22:17 +0800</pubDate><description><![CDATA[udp server里接收数据里的一段代码

     while (true)
      {       
       if (cts) break;
       byte[] data = new byte[1024];
       int recv = server.ReceiveFrom(data...]]></description><category></category></item><item><title><![CDATA[c#  tcpclient   连接超时的设置]]></title><link>https://blog.youkuaiyun.com/nini3816/article/details/89509156</link><guid>https://blog.youkuaiyun.com/nini3816/article/details/89509156</guid><author>nini3816</author><pubDate>Thu, 25 Apr 2019 13:10:18 +0800</pubDate><description><![CDATA[比如timeOut为1秒,BeginConnect是异步连接


var client = new TcpClient();
var result = client.BeginConnect("remotehost", this.Port, null, null);

var success = result.AsyncWaitHandle.WaitOne(TimeSpan.FromSeco...]]></description><category></category></item><item><title><![CDATA[c# wpf  通过控制台打印输出的两种方法]]></title><link>https://blog.youkuaiyun.com/nini3816/article/details/89487964</link><guid>https://blog.youkuaiyun.com/nini3816/article/details/89487964</guid><author>nini3816</author><pubDate>Wed, 24 Apr 2019 10:41:59 +0800</pubDate><description><![CDATA[1.用trace
using System.Diagnostics;
…
Trace.WriteLine(“text”);
2.改wpf工程的属性
右键单击项目，“属性”，“应用程序”选项卡，将“输出类型”更改为“控制台应用程序”。
推荐第一种，第二种感觉怪怪的。

...]]></description><category></category></item><item><title><![CDATA[c# 读取json 的嵌套或多层嵌套数据的简单姿势]]></title><link>https://blog.youkuaiyun.com/nini3816/article/details/89138966</link><guid>https://blog.youkuaiyun.com/nini3816/article/details/89138966</guid><author>nini3816</author><pubDate>Tue, 09 Apr 2019 11:13:01 +0800</pubDate><description><![CDATA[看了一些资料，感觉都很垃圾，或者废话多，将自己搜寻的比较简单的方法写下。需要用NuGet安装Newtonsoft.Json库

json文件为configWRC.json如下内容

{
 "JiDianQi_IP": "192.168.1.253",
 "QuanJingCameraIP": "192.168.1.123",
 "Name":"jueshi",
 "Damage":21,
...]]></description><category></category></item><item><title><![CDATA[c# 调用外部 exe]]></title><link>https://blog.youkuaiyun.com/nini3816/article/details/88973674</link><guid>https://blog.youkuaiyun.com/nini3816/article/details/88973674</guid><author>nini3816</author><pubDate>Tue, 02 Apr 2019 15:45:08 +0800</pubDate><description><![CDATA[using System.Diagnostics;

Process proc = Process.Start("..\\..\\MultiPlayDemo\\MultiPlayDemo\\bin\\Debug\\MultiPlayDemo.exe");

&nbsp;proc.WaitForExit();//这句加了就会卡在这里，外部程序退出才能继续执行


...]]></description><category></category></item><item><title><![CDATA[c#  socket操作智嵌物联的网络继电器板]]></title><link>https://blog.youkuaiyun.com/nini3816/article/details/88952092</link><guid>https://blog.youkuaiyun.com/nini3816/article/details/88952092</guid><author>nini3816</author><pubDate>Mon, 01 Apr 2019 17:18:21 +0800</pubDate><description><![CDATA[c#操作智嵌 IO 控制板 1BX3C8-I，这里只给出打开和关闭，其它的可以根据他们的手册自己添加。

最近因为工作的关系要用c#操作智嵌 IO 控制板 1BX3C8-I,他们只提供了mfc版本的程序，而且编译还有问题。看了下他们的用户手册，感觉就是一个普通的tcp/ip socket通讯，于是用c# socket来搞，半天搞定。



要使用string和hex互换函数，别的很简单，没啥好说...]]></description><category></category></item><item><title><![CDATA[python  的1970年秒数和datetime互相转换]]></title><link>https://blog.youkuaiyun.com/nini3816/article/details/81053994</link><guid>https://blog.youkuaiyun.com/nini3816/article/details/81053994</guid><author>nini3816</author><pubDate>Sun, 15 Jul 2018 16:34:31 +0800</pubDate><description><![CDATA[1 .datetime转1970年秒数import time,datetime
timeDateStr=&quot;2014-07-29 00:00:00&quot;
time1=datetime.datetime.strptime(timeDateStr,&quot;%Y-%m-%d %H:%M:%S&quot;)
secondsFrom1970=time.mktime(time1.timetuple())2.1970年秒数转date...]]></description><category></category></item><item><title><![CDATA[如何快速简单的复制sql server 2008的数据库]]></title><link>https://blog.youkuaiyun.com/nini3816/article/details/80919404</link><guid>https://blog.youkuaiyun.com/nini3816/article/details/80919404</guid><author>nini3816</author><pubDate>Wed, 04 Jul 2018 22:20:18 +0800</pubDate><description><![CDATA[网上找了很多教程，基本没几个能行的通的，而且颇为复杂。

我自己尝试了一个简单的方法：

1.把你要复制的数据库文件，mdf和ldf文件都复制到另一个地方，不用重名民。比如xxx.mdf,xxx_log.ldf.

注意:需要先把sql server 服务停止。

2.打开sql server management studio,在要复制的数据库上右键，点重命名，随便输名字，比如xxx_bakc...]]></description><category></category></item></channel></rss>