Many times we end up with machine having older version of Python, especially CentOS. In this quick tutorial, we will see how to install python from source. We are installing the latest Python version 3.8.3 here. But you can apply these steps for any version. Just make sure to update source link accordingly.
Update system and install basic development environment
yum update -y yum groupinstall -y 'Development Tools' yum install -y wget zlib-devel
Grab Python tarball of version your required.
Extract tarball and go to root directory
tar -xf Python-3.8.3.tar.xz cd Python-3.8.3
Configure the source. Here we are specifying two switches.
–prefix Determines where to keep installation files
–enabled-shared To make share shared libraries are build for this version
./configure --prefix=/usr/local --enable-shared
Time to build the source. Execute below commands
Install the source. IMPORTANT: Don’t use ‘install‘ but use ‘altinstall‘ . This will take care of not messing existing Python installation.
Because we used flag ‘–enabled-shared‘, we have to add links to newly created shared libraries. To do this, first find the location of newly generated shared library. (Replace 3.8.3 with your version)
find / -name libpython3.8.so.1.0
You will get list of multiple files. Something like below.
First file is where my source is. We are not using it. Second file is what we looking for.
Now open /etc/ld.so.conf in your favourite editor and append the path of directory of above file to it. Below is my /etc/ld.so.conf after appending directory name.
include /etc/ld.so.conf.d/*.conf /usr/local/lib
Save and exit. Then run below command to create link.
Done ! Now try to access python.
If it works, we are good. Now let’s setup pip for this installation. First grab ‘get-pip.py’ script.
curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py
Run this script using python executable we setup just now.
Check if pip is installed properly
Now we are all set. Whenever you want to install pip package, make sure to specify exact pip version. Something like below.
pip3 install poetry
In case you face errors in building/compilation, and want to start again from scratch, make sure to clean source using below commands.
make clean make distclean
Hope this helps you. Stay Awesome !