settingup-devbox.md

Linux Ubuntu DevBox Setup

Ubuntu 22.04 comes with Python 3.10.12.

How to Install and Manage Other Versions of Python Interpreters

The default Python interpreter is located at /usr/bin/python3.

Display All Installed Dependencies

To list all installed Python dependencies, use the following command:

apt list --installed | grep python

Installing Multiple Versions of Python and Switching Between Them

pyenv is a utility for managing multiple Python versions, similar to nvm for Node.js.

An alternative method is to use apt:

sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt-get update
sudo apt-get install python3.5

Install pyenv

Install Dependencies

This script installs the necessary dependencies and clones the pyenv repository.

# Prerequisites
sudo apt install libedit-dev
sudo apt uninstall python3-pip
sudo apt-get install build-essential zlib1g-dev libffi-dev libssl-dev libbz2-dev libreadline-dev libsqlite3-dev liblzma-dev
sudo apt-get install python-tk python3-tk tk-dev

Install pyenv

curl https://pyenv.run | bash

Update ~/.bashrc File

Add the following lines to the end of your ~/.bashrc file to initialize pyenv:

export PYENV_ROOT="$HOME/.pyenv"
[[ -d $PYENV_ROOT/bin ]] && export PATH="$PYENV_ROOT/bin:$PATH"
eval "$(pyenv init -)"

# Build Location
export TMPDIR="$HOME/.pyenv-tmp"

# Load Virtualenv
# Load pyenv-virtualenv automatically by adding
# the following to ~/.bashrc:
eval "$(pyenv virtualenv-init -)"

Install the Latest Version of Python

pyenv install --list | grep " 3\.[12]"

# Downloads and builds the specified version
pyenv install 3.12.3

# List installed versions
pyenv versions

# Set global Python version
pyenv global 3.12.3

pyenv-virtualenv

Install Aider or Poetry Virtual Environments

Once you have multiple Python versions running, you may need to set up global dependencies for your projects.

Aider

aider is a tool for managing virtual environments.

# Create an environment
pyenv virtualenv 3.12.3 aider

# Display newly created environment
pyenv versions

# Activate the environment
pyenv activate aider

# Deactivate the environment
pyenv deactivate

# Install aider
pip install aider-chat

# Display the number of installed packages
pip freeze | wc -l

By default, auto-commit changes are enabled. To override the default, add the following line to your ~/.bashrc file:

export AIDER_AUTO_COMMITS=0

To add this automatically from a bash command, you can use the following script:

echo 'export AIDER_AUTO_COMMITS=0' >> ~/.bashrc
source ~/.bashrc

#OLLAMA_API_BASE=http://localhost:11434/

# https://aider.chat/docs/llms.html#azure
# aider --model azure/gpt-4-32k --no-auto-commits

AZURE_API_KEY=
AZURE_API_VERSION=
AZURE_API_BASE=


# https://github.com/paul-gauthier/aider/issues/596

# https://aider.chat/docs/llms.html#ollama
# export OLLAMA_API_BASE=http://127.0.0.1:11434
# aider --model ollama/mistral:latest
# aider --model ollama/codellama:7b --no-auto-commits

Poetry

Poetry is another tool for dependency management and packaging in Python.

# Create an environment
pyenv virtualenv 3.12.3 poetry

# Display newly created environment
pyenv versions

# Activate the environment
pyenv activate poetry

# Deactivate the environment
pyenv deactivate

# Install Poetry
curl -sSL https://install.python-poetry.org | python -

# Configure Poetry to create virtual environments inside the project directory
poetry config virtualenvs.in-project true

# Create a new Poetry project
poetry new my-project

# Navigate to the project directory
cd my-project

# Add dependencies
poetry add requests

# Activate the virtual environment
poetry shell

# Deactivate the virtual environment
exit

Additional Useful Commands

Updating Python Packages

To update all installed Python packages, use the following command:

pip list --outdated | grep -v '^\-e' | cut -d ' ' -f1 | xargs -n1 pip install -U

Uninstalling Python Packages

To uninstall a Python package, use the following command:

pip uninstall <package_name>

Creating and Managing Virtual Environments with venv

To create a virtual environment using venv, use the following command:

python3 -m venv myenv

To activate the virtual environment:

source myenv/bin/activate

To deactivate the virtual environment:

deactivate

Checking Python Version

To check the current Python version, use the following command:

python --version

Basic Git Commands

To initialize a new Git repository:

git init

To clone an existing repository:

git clone <repository_url>

To check the status of your repository:

git status

To add changes to the staging area:

git add <file_name>

To commit changes:

git commit -m "Your commit message"

To push changes to a remote repository:

git push origin <branch_name>

References

• pyenvs-python-is-missing-bzip2-module
• How do I install a different Python version using apt-get?
• Managing multiple Python versions on Ubuntu/Pop!_OS