Scripts helpful for python development
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README.md
_delete_virtualenv
_init_package
_setup_venv_scripts
_switch_virtualenv
requirements.txt

README.md

python-scripts

Scripts helpful for python development.

Setup

Add the following to your .bashrc to make these commands available globally.

source /path/to/python-dev-scripts/_setup_venv_scripts

_switch_virtualenv

Creates and switches to a new virtual environment. Just switches if the venv exists. This creates a dedicated hidden directory in your home dir (/home/$USER/.venvs) where all venvs created by this script will be placed.

The default python version used is whatever is represented by the command python.

This way, you can use tree without having the screen get flooded with the contents of the venv.

Pip is automatically upgraded to the latest available version when creating a new venv.

$ _switch_virtualenv venv  # Creates venv
(venv) $ _switch_virtualenv venv2  # Creates venv2
(venv2) $ _switch_virtualenv venv  # Just switches back to venv

To specify the python version, add the -p flag. The value provided to this must either be a path to the python executable or an existing python command.

$ _switch_virtualenv venv -p python3.5  # Create venv using python3.5
$ _switch_virtualenv venv -p /usr/bin/python2.7  # Python version from path

To automatically install modules in a requirements file when creating a new venv, add the -r flag to _switch_virtualenv.

$ _switch_virtualenv venv -r my_requirements.txt

If you run into any errors creating the inital virtualenv relating to pip, just run the same command again. I have not yet looked into what's causing it, but running the same command seems to fix it and successfully create the venv.

Default modules

To install modules by default in a new venve created with _switch_virtualenv, include it in the requirements.txt located in the same directory as the _switch_virtualenv script.

The following modules are located in this requirements.txt and installed by default:

  • ipython
  • requests

_delete_virtualenv

Deletes a virtual environment created with _switch_virtualenv. If you are in the venv you are about to delete, the venv is deactivated then deleted. If you are in a different venv from the one you are deleting, the venv will just be deleted and you will remain in the current venv.

$ _switch_virtualenv venv  # Create and switch to venv
(venv) $ _switch_virtualenv venv2  # Create and switch to venv2
(venv2) $ _delete_virtualenv venv  # Delete venv
(venv2) $ _delete_virtualenv venv2  # Deactivate and delete venv2

_init_package

Creates files in the current directory for setting up a package. Created files:

  • README.md
  • setup.py
  • project directory
  • requirements.txt
  • dev-requirements.txt
  • python .gitignore
$ _init_package project_name

##_setup_venv_scripts Sets up autocompletion for _switch_virtualenv and _delete_virtualenv. Hitting tab when using these scripts will list any existing virtualenvs in /home/$USER/.venvs.

$ source _setup_venv_scripts
$ _switch_virtualenv venv
(venv) $ _switch_virtualenv v[TAB]
venv
(venv) $ _switch_virtualenv venv2
(venv2) $ _delete_virtualenv v[TAB]
venv venv2