Python Cheatsheet

Virtual Environment Link to heading

In this example, folder for the Virtual Environment is .venv

python3 -m venv .venv

source .venv/bin/activate

deactivate

Packages Link to heading

pip install name-of-package

pip uninstall name-of-package

pip install -r requirements.txt

pyenv Link to heading

Manage different versions of python.

List all version installed: pyenv versions

Switch to a particular version example: pyenv global 3.8

Reset back to default: pyenv global system

List all version available for install: pyenv install -l

Install a python version example: pyenv install 3.8

If installation of python version fail, ensure dependencies are installed:

sudo apt update
sudo apt install \
    build-essential \
    curl \
    libbz2-dev \
    libffi-dev \
    liblzma-dev \
    libncursesw5-dev \
    libreadline-dev \
    libsqlite3-dev \
    libssl-dev \
    libxml2-dev \
    libxmlsec1-dev \
    llvm \
    make \
    tk-dev \
    wget \
    xz-utils \
    zlib1g-dev

pyenv usage example Link to heading

Create new virtualenv (use same name as project name to avoid confusion): pyenv virtualenv <version-number> <name-of-venv> For e.g. pyenv virtualenv 3.10 ProjectName

Activate: pyenv local ProjectName