Recently, I encountered some mistakes as shown in the title when doing deep learning classification, but I don’t know how to modify them. Finally, after exploration, I successfully solved them
the problems and solutions are reported directly below.
Error 
Solution
In practice, the label of classification should be long, and the image should be float32
therefore, modifying the data type will succeed
When installing a python module with pip or pychar, you sometimes encounter a readtimeout error. The reason for this problem is probably the network speed
my default source is Tsinghua, sometimes the link network is not good ( the day after the college entrance examination today, it is estimated that there are too many visitors, everyone wants to go to Tsinghua, ha ha ), so I change the source.
pip --default-timeout=100 install pyspark -i http://pypi.douban.com/simple/ --trusted-host pypi.douban.com
Perfect solution
Ubuntu pyinstaller Error when packaging the executable: … qt.qpa.plugin: Could not find the Qt platform plugin “xcb” in “…
Solution to the problem
Problem
Ubuntu pyinstaller reports an error when packaging the executable: .QFactoryLoader::QFactoryLoader() checking directory path “/home/dyj/CarUI/dist/carmain/platforms” … qt.qpa.plugin: Could not find the Qt platform plugin “xcb” in “” This application failed to start because no Qt platform plugin could be initialized.
Solution
Add the following code to your own main program code.
import os
import PySide2
dirname = os.path.dirname(PySide2.__file__)
plugin_path = os.path.join(dirname, 'plugins', 'platforms')
os.environ['QT_QPA_PLATFORM_PLUGIN_PATH'] = plugin_path
View port and resolve port conflict in Windows
netstat -ano
netstat -ano|findstr "9510"
tasklist |findstr "11056"
taskkill /f /t /im "node.exe"
Today, in the mapper. XML file, I mistakenly annotated it with /* * code description */ and then reported this error
the specific exception is as follows
Caused by: org.xml.sax.SAXParseException; lineNumber: 134; columnNumber: 10, The element type "mapper" must match "(cache-ref|cache|resultMap*|parameterMap*|sql*|insert*|update*|delete*|select*)+"。
error code
/** Public conditions */
<sql id="commonIfWhere">
<if test='params.projectId != null and params.projectId != ""'>
and project_id = #{params.projectId}
</if>
<if test='params.id!= null and params.id != ""'>
and id = #{params.id}
</if>
</sql>
after correction
<!-- Public conditions -->
<sql id="commonIfWhere">
<if test='params.projectId != null and params.projectId != ""'>
and project_id = #{params.projectId}
</if>
<if test='params.id!= null and params.id != ""'>
and id = #{params.id}
</if>
</sql>
The problem was solved smoothly
The main class com.hp.springbootapplication cannot be found or loaded
Solution: if the version is too high, change the version of 2.5.0 to a lower version
Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.22.2:test (default-test) on project springboot-sugon-3: There are test failures.
Maven error: Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.22.2:test (default-test) on project springboot-sugon-3: There are test failures.
Please refer to D:\Java_study\springboot\springboot-sugon-3\target\surefire-reports for the individual test results.
Please refer to dump files (if any exist) [date].dump, [date]-jvmRun[N].dump and [date].dumpstream.**
Solution: Add the following code to pom.xml.
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.2</version>
<configuration>
<skipTests>true</skipTests>
</configuration>
</plugin>
Time: 2021.5.28
error: field xxxmapper in com.xxx.service.impl.xxxserviceimpl required a bean of type
When writing the small demo of springboot integrating SSM, Dubbo and redis,
just add the @ mapper annotation 
to the corresponding mapper interface
Background
Charles postman has been opened locally. The post request cannot be sent normally. Error: self signed certificate
Solution
Just turn off the switch
[Solved]RemoveError: ‘requests’ is a dependency of conda and cannot be removed from conda’s operating environment.
Collecting package metadata: done
Solving environment: done
Downloading and Extracting Packages
certifi-2018.1.18 | 144 KB | ############################################################################ | 100%
mkl-2018.0.1 | 155.2 MB | ############################################################################ | 100%
freetype-2.9.1 | 475 KB | ############################################################################ | 100%
scipy-1.0.0 | 13.0 MB | ############################################################################ | 100%
......
......
pyparsing-2.3.1 | 54 KB | ############################################################################ | 100%
kiwisolver-1.0.1 | 60 KB | ############################################################################ | 100%
qt-5.6.2 | 55.6 MB | ############################################################################ | 100%
setuptools-38.4.0 | 540 KB | ############################################################################ | 100%
matplotlib-2.2.2 | 6.5 MB | ############################################################################ | 100%
six-1.12.0 | 21 KB | ############################################################################ | 100%
openssl-1.0.2n | 5.4 MB | ############################################################################ | 100%
pyqt-5.6.0 | 4.5 MB | ############################################################################ | 100%
zlib-1.2.11 | 236 KB | ############################################################################ | 100%
tornado-5.1.1 | 665 KB | ############################################################################ | 100%
sqlite-3.22.0 | 907 KB | ############################################################################ | 100%
cycler-0.10.0 | 8 KB | ############################################################################ | 100%
Preparing transaction: done
Verifying transaction: failed
RemoveError: 'requests' is a dependency of conda and cannot be removed from
conda's operating environment.
conda update --force condaconda update –force conda
conda remove c> create : conda create : conda create : conda remove : conda create :
RemoveError: ‘setuptools’ is a dependency of Conda and cannot be removed from Conda
I checked a bunch of blogs and they all suggested updating Conda.
conda update --force-reinstall conda
The problem came again. After the command was entered, the process kept spinning in circles, and the terminal did not show any idea of updating. Angry dead an ！！！！
I fat tiger not letter can not treat you!!
Solution:
enter the command: gedit. Condarc
the HTTPS instead of HTTP from the original image of the source can be updated again
I will be the original. Condarc file to the following form, for reference only.
ssl_verify: true
channels:
- http://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/
show_channel_urls: true
conda update --force-reinstall conda Be able to normal use after
conda remove or conda create command
Cause of error:
You can’t traverse the key value pairs of the dictionary like this in Python
for k, v in k_map:
It needs to be written
for k, v in k_map.items():