Announcing Pipenv!

I wrote a new tool this weekend, called pipenv. Check it out on GitHub!

Pipenv in action.

Pipenv in action.

Pipenv is an experimental project that aims to bring the best of all packaging worlds to the Python world. It harnesses Pipfile, pip, and virtualenv into one single toolchain. It features very pretty terminal colors.

It automatically creates and manages a virtualenv for your projects, as well as adds/removes packages from your Pipfile as you install/uninstall packages. The lock command generates a lockfile (Pipfile.lock).

☤ Features

  • Automatically finds your project home, recursively, by looking for a Pipfile.
  • Automatically generates a Pipfile, if one doesn't exist.
  • Automatically generates a Pipfile.lock, if one doesn't exist.
  • Automatically creates a virtualenv in a standard location (project/.venv).
  • Automatically adds packages to a Pipfile when they are installed.
  • Automatically removes packages from a Pipfile when they are un-installed.
  • Also automatically updates pip.

The main commands are installuninstall, and lock, which generates a Pipfile.lock. These are intended to replace $ pip install usage, as well as manual virtualenv management.

☤ Basic Concepts

  • A virtualenv will automatically be created, when one doesn't exist.
  • When no parameters are passed to install, all packages specified will be installed.
  • When no parameters are passed to uninstall, all packages will be uninstalled.
  • To initialize a Python 3 virtual environment, run $ pipenv --three first.
  • To initialize a Python 2 virtual environment, run $ pipenv --two first.
  • Otherwise, whatever $ which python will be the default.

☤ Other Commands

  • shell will spawn a shell with the virtualenv activated.
  • run will run a given command from the virtualenv, with any arguments forwarded (e.g. $ pipenv run python).
  • check asserts that PEP 508 requirements are being met by the current environment.

☤ Usage

$ pipenv
Usage: pipenv [OPTIONS] COMMAND [ARGS]...

Options:
  --where          Output project home information.
  --bare           Minimal output.
  --three / --two  Use Python 3/2 when creating virtualenv.
  --version        Show the version and exit.
  --help           Show this message and exit.

Commands:
  check      Checks PEP 508 markers provided in Pipfile.
  install    Installs a provided package and adds it to...
  lock       Generates Pipfile.lock.
  run        Spans a command installed into the...
  shell      Spans a shell within the virtualenv.
  uninstall  Un-installs a provided package and removes it...
  update     Updates pip to latest version, uninstalls all...


$ pipenv --where
Pipfile found at /Users/kennethreitz/repos/kr/pip2/test/Pipfile. Considering this to be the project home.


$ pipenv install
Creating a virtualenv for this project...
...
No package provided, installing all dependencies.
Virtualenv location: /Users/kennethreitz/repos/kr/pip2/test/.venv
Installing dependencies from Pipfile.lock...
...

To activate this project's virtualenv, run the following:
$ pipenv shell


$ pipenv install pytest --dev
Installing pytest...
...
Adding pytest to Pipfile's [dev-packages]...


$ pipenv lock
Assuring all dependencies from Pipfile are installed...
Locking [dev-packages] dependencies...
Locking [packages] dependencies...
Note: your project now has only default [packages] installed.
To install [dev-packages], run: $ pipenv init --dev



$ pipenv install --dev
Pipfile found at /Users/kennethreitz/repos/kr/pip2/test/Pipfile. Considering this to be the project home.
Pipfile.lock out of date, updating...
Assuring all dependencies from Pipfile are installed...
Locking [dev-packages] dependencies...
Locking [packages] dependencies...
Note: your project now has only default [packages] installed.
To install [dev-packages], run: $ pipenv install --dev
Installing dependencies from Pipfile.lock...
...


$ pipenv uninstall
No package provided, un-installing all dependencies.
Found 25 installed package(s), purging...
...
Environment now purged and fresh!


$ pipenv shell
Spawning virtualenv shell (/bin/zsh).
(test)$

 

☤ Installation

$ pip install pipenv

✨🍰✨