CentOS common exceptions and solutions

1.pip3 install mysqlclient error python setup.py egg_info Check the logs for full command output.

When deploying a Django project on CentOS, it is often necessary to install a MySQL database engine, such as mysqlclient. When executing a pip3 install mysqlclientcommand, an error may be reported as follows:

ERROR: Command errored out with exit status 1:
     command: /usr/bin/python3 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-zmnd8v74/mysqlclient/setup.py'"'"'; __file__='"'"'/tmp/pip-install-zmnd8v74/mysqlclient/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-pip-egg-info-jpy0d_w0
         cwd: /tmp/pip-install-zmnd8v74/mysqlclient/
    Complete output (12 lines):
    /bin/sh: mysql_config: command not found
    /bin/sh: mariadb_config: command not found
    /bin/sh: mysql_config: command not found
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-install-zmnd8v74/mysqlclient/setup.py", line 15, in <module>
        metadata, options = get_config()
      File "/tmp/pip-install-zmnd8v74/mysqlclient/setup_posix.py", line 65, in get_config
        libs = mysql_config("libs")
      File "/tmp/pip-install-zmnd8v74/mysqlclient/setup_posix.py", line 31, in mysql_config
        raise OSError("{} not found".format(_mysql_config_path))
    OSError: mysql_config not found
    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

This is because the mysql-devel package is missing and needs to be installed now. At the same time, in order to resolve package version conflicts and dependency conflicts, you need to download and install the yum source of mysql. The command is as follows:

# 下载对应版本mysql的yum源的rpm包
wget http://repo.mysql.com/mysql57-community-release-el7-8.noarch.rpm

# 安装rpm包
rpm -ivh mysql57-community-release-el7-8.noarch.rpm

Then execute the yum install mysql-develcommand to install the mysql-devel package and print as follows:

Loaded plugins: fastestmirror
mysql-connectors-community                                                                                                                                                                 | 2.6 kB  00:00:00     
mysql-tools-community                                                                                                                                                                      | 2.6 kB  00:00:00     
mysql57-community                                                                                                                                                                          | 2.6 kB  00:00:00     
Loading mirror speeds from cached hostfile
Resolving Dependencies
--> Running transaction check
---> Package mysql-community-devel.x86_64 0:5.7.32-1.el7 will be installed
--> Finished Dependency Resolution

The mysql-devel package is installed successfully.

Finally, execute the pip3 install mysqlclientcommand to successfully install the mysqlclient engine.