Author Archives: Robins

Microsoft Store install Ubuntu

Search for Ubuntu in the Microsoft Store (I only tested this system. If someone likes to toss, they can also try other systems, such as SUSE and Debian). The process of installing Ubuntu in the application page is very simple, just like installing software.

Search for Ubuntu in Cortana in the lower left corner, and click to enter. The interface you see is just like our terminal interface in Ubuntu. Test the LS command in this window, and it is correct.

Windows 10 Linux subsystem graphical interface
Update

sudo apt-get update

Install xorg

sudo apt-get install xorg

Install xfce4

sudo apt-get install xfce4

Installing xrdp

sudo apt-get install xrdp

Configuring xrdp

sudo sed -i ‘s/port=3389/port=3390/g’ /etc/xrdp/ xrdp.ini

Above is the configuration port

Write xfce4 session to xsession

sudo echo xfce4-session >~/.xsession

Restart xrdp service

sudo service xrdp restart

If there is a firewall, just allow it.

Search for remote desktop connection in Cortana, click enter, input local IP: port, and subsystem user name (in step 2, before the @ symbol in the terminal window)

Graphical interface of Linux subsystem under Windows 10
graphical interface of Linux subsystem under Windows 10
login is successful, and the graphical interface of Ubuntu is displayed.

Graphical interface of Linux subsystem under Windows 10

Xrdp should be started in the terminal before each remote connection, and the window cannot be closed.

Latex: How to enter an underline

By default, latex sets the_ “As a part of the subscript representation in the mathematical model, this kind of processing is very unpleasant in many cases, such as the underlined variable: host in the code_ Name or something. Although you can use “host”\_ “Name” and so on, but it’s not easy to read. The following method can deal with most problems.

 

If not, please refer to http://www.tex.ac.uk/cgi-bin/texfaq2html?label=underscore

 

 

%%%%%%%Handling underlines._%%%%%%%%%
\usepackage{underscore}
%%%%%%%Handling underlines._%%%%%%%%%

 

WeChat official account web page authorized, redirect_ Uri parameter error, solution!

Recently, WeChat has been experiencing some problems, such as WeChat official account authorization, redirect_ The URI parameter is wrong, but many articles on the Internet can’t be explained clearly. They have been revised over and over again, but they still can’t.

The callback in WeChat official account can only be a full domain name, such as your visit. http://www.xx.com/authorize Authentication, but callback to fill in www.xx.com And then the request parameter is HTTP% 3A% 2F% 2 fwww.xx.com%2fauthorize , URLEncode is required

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException

If there is no problem with the annotation, I suggest you check it web.xml Configuration, I was sliding monitoring class introduction error, resulting in an error.
That’s right:

<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

This is hand skating:

<listener>
    <listener-class>org.springframework.web.context.ContextLoader</listener-class>
  </listener>

AttributeError: module ‘cv2.cv2‘ has no attribute ‘face‘

Today, there was an error when running opencv module attributeerror: module 'CV2. CV2' has no attribute 'face' , CSDN checked and said that it was necessary to uninstall opencv first and then install it again. I felt that it was too troublesome, so I tried to find the answer in stackoverflow, which was effective. I specially recorded it

Opencv has two modules, OpenCV_ contrib_ python、opencv_ Python let their two version numbers be the same is OK.
If not, adjust the version number of the two modules at the same time and try again. Remember to be consistent

PIP install the specified version

pip install opencv_contrib_python == version

If this helps you, please click like to support it 😀

Git: How to delete stash content

Delete the content of stash, feel the whole world is clean:

In fact, there are just a few commands:

Git stash list / / view the stash list

If you get this result, your stash has nothing
in it

This means that there is a queue
in the queue

 

Then you can execute git stash clear: note that this is to clear all your content

$ git stash drop stash@{0}  This is the first queue to be deleted

 

(20210301 solved) can’t connect to HTTPS URL because the SSL module is not available

Overview uses requests to send a message with the following error:

Can’t connect to HTTPS URL because the SSL module is not available.

there is no problem with the requested URL, and the Linux side is running normally. Only Anaconda under Windows runs abnormally. In the solution reference, 3, 4 and 5 are common explanations, which have no effect on my situation. In my case, I use the second answer in reference 1:

# copy the files
libcrypto-1_1-x64.*
libssl-1_1-x64.*
# from ~\anaconda3\Library\bin to ~\anaconda2\DLLs

This can solve the problem, the specific reason is still not understand, mainly for the SSL network transmission level understanding is not deep enough. References

    requests (caused by sslerror (“can’t connect to HTTPS URL because the SSL module is not available.”) error in pychar requesting websitecan’t connect to HTTPS URL because the SSL module is not available ⁑ python3 sends an HTTPS request using the requests module, indicating caused by SSL error, can’t connect to HTTPS URL because the SSL module is not available When using the requests library, python reports an error when visiting the website of HTTPS. SSL module is not available. Python encounters can’t connect to HTTPS URL because the SSL module is not available.

C++ compiler prompt “undefined reference to…”[How to Fix]

Write a simple C + + clock class, put into the header file, the main function in the call header file compilation error, the specific code is as follows:

clock.h:

#include <iostream>
using namespace std;

class Clock
{
    private:
        int h,m,s;
    public:
        Clock();
        ~Clock();
        void SetTime(int h,int m,int s);
        void AddOneS();
        void ShowTime();
};
void Clock::SetTime(int h,int m,int s)
{
    
    this->h = h;
    this->m = m;
    this->s = s;
}
void Clock::ShowTime()
{
    cout<<h<<":"<<m<<":"<<s<<endl;
}

Main function:

#include "clock.h"   //When calling custom headers, use "" instead of<>
using namespace std;

int main(void)
{
    Clock c1,c2;
    c1.SetTime(2,45,36);
    c2.SetTime(6,40,34);
    c1.ShowTime();
    c2.ShowTime();
return 0;
}

Error prompt:

Check the error because “reference clock:: clock() and clock:: clock() are not defined”

It turns out that there is no function body for constructors and destructors

(1) : define function body in class: clock () {} ~ clock () {}

(2) : define function body outside class: void clock:: clock() {} void clock:: ~ clock() {}

MyBatis: Mapped Statements collection does not contain value for xxx

Complete error message:

Nov 03, 2015 10:01:08 AM org.apache.catalina.core.StandardWrapperValve invoke
Warming: Servlet.service() for servlet [springmvc] in context with path [/xinghe-platform-web] threw exception [Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for ResScore.getByResourceLocalIds
### Cause: java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for ResScore.getByResourceLocalIds] with root cause
java.lang.IllegalArgumentException: Mapped Statements collection does not contain value for ResScore.getByResourceLocalIds
    at org.apache.ibatis.session.Configuration$StrictMap.get(Configuration.java:797)
    at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:631)
    at org.apache.ibatis.session.Configuration.getMappedStatement(Configuration.java:624)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:107)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102)
    at sun.reflect.GeneratedMethodAccessor71.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:358)
    at com.sun.proxy.$Proxy17.selectList(Unknown Source)
    at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:198)
    at com.xinghe.platform.dao.ResScoreDao.getByResourceLocalId(ResScoreDao.java:43)
    at com.xinghe.platform.service.ResScoreManager.getByResourceLocalId(ResScoreManager.java:41)
    at com.xinghe.platform.service.ResScoreManager$$FastClassBySpringCGLIB$$68ba2513.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:717)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:653)
    at com.xinghe.platform.service.ResScoreManager$$EnhancerBySpringCGLIB$$8cc6352f.getByResourceLocalId(<generated>)
    at com.xinghe.platform.action.ResResourcePublic.getScore(ResResourcePublic.java:433)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:177)
    at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:446)
    at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:434)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:857)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at com.auth.filter.AuthorizationFilter.doFilterInternal(AuthorizationFilter.java:77)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:344)
    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:261)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at com.auth.filter.AuthenticationFilter.doFilterInternal(AuthenticationFilter.java:115)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:344)
    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:261)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at com.xinghe.activate.filter.ActivateFilter.doFilterInternal(ActivateFilter.java:52)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:344)
    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:261)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:617)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:668)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1521)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1478)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Unknown Source)

Environment: Java project, spring MVC + mybatis framework,
source code location of this error:
when you see mybatis SystemException, you first think that the error may occur in ResScoreMapper.xml File, but Dao layer is directly related to Mapper.xml If you view the error information, you can see the following information: com.xinghe.platform . dao.ResScoreDao.getByResourceLocalId ( ResScoreDao.java:43 ）
the mistake I encountered happened here!
error reason:
said the cause of the error, here made a mistake in pediatrics, copied the code from other Dao files, changed the name of the method, and changed the command space and method name in the Mapper that was invoked in selectOne, resulting in this error;
Mapped Statements collection does not does ResScore.getByResourceLocalIds
This is because the map getbyresourcelocalids cannot be found in mapper.

Python: How to Find the square root and square of numbers (Several methods)

Method 1: use the built-in module

>>> import math

>>> math.pow(12, 2)     # Request Square
144.0

>>> math.sqrt(144)      # Find the square root
12.0

>>>

Method 2: use expression

>>> 12 ** 2             # Request Square
144

>>> 144 ** 0.5          # Find the square root
12.0

>>>

Method 3: use built-in function

>>> pow(12, 2)          # Request Square
144

>>> pow(144, .5)        # Find the square root
12.0

>>>

Tensorflow import Error: ImportError: libcuda.so.1: cannot open shared object file: No such file or dire

sudo nvidia-docker run -p 8888:8888  –name tf1.11_py3 -it   -v /home/wang/:/home/wang 0641cda31e80
How to Fix this issue:
>>> import tensorflow
Traceback (most recent call last):
File “<stdin>”, line 1, in <module>
File “/usr/local/lib/python2.7/dist-packages/tensorflow/__init__.py”, line 22, in <module>
from tensorflow.python import pywrap_tensorflow  # pylint: disable=unused-import
File “/usr/local/lib/python2.7/dist-packages/tensorflow/python/__init__.py”, line 49, in <module>
from tensorflow.python import pywrap_tensorflow
File “/usr/local/lib/python2.7/dist-packages/tensorflow/python/pywrap_tensorflow.py”, line 74, in <module>
raise ImportError(msg)
ImportError: Traceback (most recent call last):
File “/usr/local/lib/python2.7/dist-packages/tensorflow/python/pywrap_tensorflow.py”, line 58, in <module>
from tensorflow.python.pywrap_tensorflow_internal import *
File “/usr/local/lib/python2.7/dist-packages/tensorflow/python/pywrap_tensorflow_internal.py”, line 28, in <module>
_pywrap_tensorflow_internal = swig_import_helper()
File “/usr/local/lib/python2.7/dist-packages/tensorflow/python/pywrap_tensorflow_internal.py”, line 24, in swig_import_helper
_mod = imp.load_module(‘_pywrap_tensorflow_internal’, fp, pathname, description)
Tensorflow import error ImportError: libcuda.so.1: cannot open shared object file: No such file or directory
When starting docker, the original use was.
sudo docker run -p 8888:8888  –name tf1.11_py2 -it   -v /home//wang/:/home//wang 0641cda31e80
switch to
sudo nvidia-docker run -p 8888:8888  –name tf1.11_py3 -it   -v /home/wang/:/home/wang 0641cda31e80