The command yum install python36-devel python36 gcc allows you to install Python 3.6 along with the C compiler and development packages on CentOS, AlmaLinux, and RHEL-based systems. This process is often necessary for compiling Python modules (especially those written in C).

Packages Included in the Command:

python36: Basic installation of Python version 3.6.
python36-devel: Includes header files and compilation tools for Python 3.6. It is especially required for some modules during pip install.
gcc: GNU C Compiler. It is mandatory for C-based Python modules to be compiled on the system.

When to Use?

When you get errors like "Python.h not found" while installing packages with pip install.
When installing Python modules that require compilation, such as uwsgi, lxml, cryptography, numpy, pandas.
When preparing system dependencies for Python-based web applications (Django, Flask, etc.).

Example Usage:

yum install -y python36 python36-devel gcc

What to Do Next:

You can install Python modules:

pip3 install numpy
pip3 install uwsgi

Or you can create a virtual environment for a specific project:

python3.6 -m venv venv
source venv/bin/activate

Things to Consider:

Python 3.6 is an old version. 3.8+ is recommended for new projects.
On yum-based systems, Python versions are provided through the EPEL (Extra Packages for Enterprise Linux) repository. If necessary, EPEL must be installed first: