Environment: Ubuntu 18.04

Error 1. OSError: mysql_config not found

Solution 1

sudo apt-get install libmysqlclient-dev -y

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Error 2. unable to execute ‘x86_64-linux-gnu-gcc’: No such file or directory

Solution 2

sudo apt-get install gcc -y

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Error 3. MySQLdb/_mysql.c:46:10: fatal error: Python.h: No such file or directory

Solution 3

sudo apt-get install python3-dev -y

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Final Code

sudo apt-get update
sudo apt-get install python3-venv -y
sudo apt-get install libmysqlclient-dev -y
sudo apt-get install gcc -y
sudo apt-get install python3-dev -y
python3 -m venv venv
. venv/bin/activate
pip install mysqlclient

Happy Coding!