Thanks, I was able to install my custom app adding the packages to requiremets.txt in my local machine I have added this

'external_dependencies': {         
	​'python': ['sqlalchemy','pymysql'],    
},

to the manifest of my custom app and as you said also installing the packages in the virtual environment VENV in VS Code 

Thanks in advance

Hi,

1. Make sure that you installed the mariadb package in the same environment that Odoo is using.

Then, install the mariadb package using the correct Python environment

python3 -m pip install mariadb

2. Install the Package Globally or in a Virtual Environment:

pip install mariadb

3. If you're not using a virtual environment, you may need to install the package globally:

sudo pip3 install mariadb

Regards