Pipenv harnesses Pipfile, Pip, and Virtualenv together in unison to create a single, high-quality tool that is optimized for workflow efficiency and best practices.

Pipenv automatically creates and manages the virtualenvs of your projects, as well as adds/removes packages from your Pipfile as you install/uninstall packages. The lock command generates a lockfile (Pipfile.lock).

The propblems that Pipenv seeks to solve are multi-faceted:

• When using Pipenv, you no longer need to use pip and virtualenv separately. They work together.
• Managing a requirements.txt file can be problematic, so Pipenv uses the upcoming Pipfile and Pipfile.lock instead, which is superior for basic use cases.

Jannis Leidel, former pip maintainer—

Pipenv is the porcelain I always wanted built for pip. It fits my brain and mostly replaces virtualenvwrapper and manual pip calls for me. Use it.

Jhon Crypt—

pipenv is the best thing since pip, thank you!

Isaac Sanders—

pipenv is literally the best thing about my day today. Thanks, Kenneth!

• Enables truly deterministic builds, while easily specifying what you want.
• Generates and checks file hashes for locked dependencies (via --hashes).
• 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.
• 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 install, uninstall, and lock, which generates a Pipfile.lock. These are intended to replace $ pip install usage, as well as manual virtualenv management (to activate a virtualenv, run $ pipenv shell).

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

• 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.

Set _PIPENV_COMPLETE and then source the output of the program. For example, with fish, put this in your ~/.config/fish/completions/pipenv.fish:

eval (env _PIPENV_COMPLETE=source-fish pipenv)

Magic shell completions are now enabled!

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

Options:
  --where          Output project home information.
  --venv           Output virtualenv information.
  --rm             Remove the virtualenv.
  --bare           Minimal output.
  --three / --two  Use Python 3/2 when creating virtualenv.
  --python TEXT    Specify which version of Python virtualenv should use.
  -h, --help       Show this message then exit.
  --version        Show the version and exit.


Usage Examples:
   Create a new project using Python 3:
   $ pipenv --three

   Install all dependencies for a project (including dev):
   $ pipenv install --dev

   Create a lockfile:
   $ pipenv lock

Commands:
  check      Checks PEP 508 markers provided in Pipfile.
  install    Installs provided packages and adds them to...
  lock       Generates Pipfile.lock.
  run        Spawns a command installed into the...
  shell      Spawns 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/.local/share/virtualenvs/test-EJkjoYts
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 install --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...

$ 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)$

$ pip install pipenv

✨🍰✨

Documentation resides over at pipenv.org.