Ubuntu/20/Python3.14

You cannot install Python 3.14 via the deadsnakes PPA on Ubuntu 20.04 (Focal Fossa), because Ubuntu 20.04 has reached end-of-standard-support and deadsnakes does not build newer Python versions for legacy releases.

For Ubuntu 22, 24, 26 see Ubuntu/Python3.14

See:

• https://launchpad.net/~deadsnakes/+archive/ubuntu/ppa
• https://ubuntuhandbook.org/index.php/2025/05/install-python-3-14-ubuntu/

To use Python 3.14 on Ubuntu 20.04, compile it from source or upgrade your operating system to a newer release like Ubuntu 24.04 (Noble Numbat) where Python 3.14 packages are available.

Compile Python 3.14 from Source on Ubuntu 20.04

WARNING: THIS WILL BE USING AN OLDER VERSION OF OPENSSL, UNLESS YOU BUILD AND COMPILE A NEWER OPENSSL AS WELL

1. Update your system and install build dependencies:bash

sudo apt update
sudo apt install build-essential libssl-dev zlib1g-dev libncurses5-dev \
libreadline-dev libffi-dev libsqlite3-dev wget curl llvm libbz2-dev

2.. Download the Python 3.14 source code (replace with the specific release version/rc):

wget https://python.org
tar -xf Python-3.14.0.tar.xz
cd Python-3.14.0

3. Configure and compile:bash

./configure --enable-optimizations
make -j$(nproc)
sudo make altinstall

3. Verify the installation:bash

python3.14 --version