pip install lxml

to install mmcv-full requires the following command:

pip uninstall mmcv mmcv-full
git clone https://github.com/open-mmlab/mmcv.git
cd mmcv
MMCV_WITH_OPS=1 pip install -e .

the following error occurred while performing the last step:

command 'gcc' failed with exit status 4

so the solution:

1, check to see if disk space is sufficient

2.

pip install lxml

Can't exec "aclocal": No such file or directory at /usr/local/Cellar/autoconf/2.69/share/autoconf/Autom4te/FileUtils.pm line 326.
autoreconf: failed to run aclocal: No such file or directory

installation

automake

       
       

       
The

error occurs when you write to an editor, such as the log redirection described earlier, and occurs when you double-click.

problem is solved by locating the specific code, and then delaying the execution of this line of code. The delay time is when the editor GUI is updated, there is a corresponding callback in unity, and the code can be executed by putting it in the callback. For example, the log redirection corresponds to the following change:

EditorApplication.delayCall = delegate(){ AssetDatabase.OpenAsset(obj, line); };
  

• 1

An error occured when installing mysql service today,

The action ‘Install’ for product ‘MySQL Server 5.7.19’ failed.

attempted to uninstall the file, it was useless to reinstall, finally found a solution:

32 Visual C++ Redistributable Packages for Visual Studio 2013!! 32 bit . Even if your computer is 64 bit

installation site: https://www.microsoft.com/zh-cn/download/details.aspx?id=40784

although do not know why, but the problem has been solved, mysql service installed successfully.

MySQL installation: http://jingyan.baidu.com/article/cd4c2979033a17756f6e6047.html

reproduced from http://blog.csdn.net/JINsweet/article/details/78110835?locationNum=5

after installing the win10 virtual machine on the ubuntu20.04 host by VM Workstation Pro, some errors occur when you first boot:

VMWare Virtual Machine Monitor Failed

The

link may help you, it has solved my problem :

click this link
you may not know the following operations :

so see this link :
how to disable secure boot in my BIOS

When

has completed all operations, execute this command :

 vmware-modconfig --console --install-all

if this page appears :

congratulations, you have succeeded!

1. First, set IP

in Hosts

2. Named rows run: net start OracleDBConsoleTC

run oleview.exe with administrator privileges (Visual Studio Tools\VS20XX developer command prompt -> Run with administrator privileges -& GT; Enter OleView)

http://stackoverflow.com/questions/7621461/dllregisterserver-in-iviewers-failed

is now ubiquitous for sites that begin with HTTPS, and urllib2 can request SSL certificates for HTTPS, just like a web browser, if the site’s SSL certificate is CA certified, it can be accessed normally,

if SSL certificate authentication fails, or if the operating system does not trust the server’s security certificate, such as when the browser visits the 12306 site, it warns the user that the certificate is not trusted. (it is said that 12306 website certificate is done by oneself, did not pass CA authentication)

warns the user that the certificate is not trusted

urllib2 will report SSLError when accessing:

import urllib2
url = "https://www.12306.cn/mormhweb/"
headers = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.99 Safari/537.36"}
request = urllib2.Request(url, headers = headers)
response = urllib2.urlopen(request)
print response.read()

operation results:

urllib2.URLError: < urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:590)>

therefore, if we encounter such a site in the future, we need to process SSL certificates separately, let the program ignore SSL certificate validation errors, can be normal access.

import urllib
import urllib2

# 1. 导入Python SSL处理模块
import ssl
 
# 2. 表示忽略未经核实的SSL证书认证
context = ssl._create_unverified_context()
 
url = "https://www.12306.cn/mormhweb/"
headers = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.99 Safari/537.36"}
request = urllib2.Request(url, headers = headers)
 
# 3. 在urlopen()方法里 指明添加 context 参数
response = urllib2.urlopen(request, context = context)
print response.read()

Summary: the solution includes the following two ways:

1. Use SSL to create an unauthenticated context, passing in the context parameter

in urlopen

import ssl
import urllib2
context = ssl._create_unverified_context()
print urllib2.urlopen("https://www.12306.cn/mormhweb/", context=context).read()

2. Global cancel certificate validation

import ssl
import urllib2
 
ssl._create_default_https_context = ssl._create_unverified_context
print urllib2.urlopen("https://www.12306.cn/mormhweb/").read()

About CA

CA(Certificate Authority) is the short name of digital Certificate certification Authority, which refers to a trusted third-party organization that issues, manages and abolishes digital certificates,

The

CA checks the legitimacy of the certificate holder’s identity and issues certificates to prevent certificates from being forged or tampered with, as well as to manage certificates and keys.

id can be used to prove identity in real life, so in the network world, digital certificate is id. Different from the real life, not every Internet user has a digital certificate, often only when a person needs to prove their identity to use the digital certificate.

the average user generally does not need, because the website does not care who visits the website, now the website only CARES about the traffic. But in turn, the site needs to prove its identity.