Pipenv! Python dev workflow for humans.

Pipenv! Python Dev Workflow for Humans Andreu Vallbona Pycones 2018

Pipenv: Python Dev Workflow for Humans Andreu Vallbona - Pycones
- October 2018 Who am I Andreu Vallbona @avallbona Bachelor degree in computer science Web developer at APSL, Mallorca, Spain Mainly developing with Python and Django

- October 2018 What we do at APSL Web development Systems engineering - devops Data science Mobile apps Consulting and formation

- October 2018 What it is? it’s a package and virtualenv managing system it’s aimed to replace the use of pip and virtualenv

- October 2018 Created by Kenneth Reitz Creator of many useful projects such as: Requests: HTTP for Humans Maya: Datetimes for Humans Records: SQL for Humans Requests-HTML: HTML Parsing for Humans

- October 2018 Current state of the art Before pipenv we used to create a python environment with virtualenv install some packages freeze the dependencies

- October 2018 requirements.txt anatomy list of dependencies with pinned versions

- October 2018 Problems Problems

- October 2018 Problems pip and virtualenv are concepts difficult to understand for beginners

- October 2018 Problems requirements.txt is difficult to maintain

- October 2018 Problems we have to remember to update the requirements.txt file

- October 2018 Problems For different environments we need to maintain several requirements.txt files

- October 2018 Problems we do not easily know what python version the project uses

- October 2018 Problems transitive relations A -> B -> C

- October 2018 Solutions Solutions

- October 2018 What problems does pipenv solve? avoid manually maintenance of the dependencies

- October 2018 What problems does pipenv solve? easy to know which version of python the project uses

- October 2018 What problems does pipenv solve? show us the dependencies in a more concise way

- October 2018 What problems does pipenv solve? update dependencies securely and automatically

- October 2018 What problems does pipenv solve? allow us to have a default environment and a development environment

- October 2018 Installation Installation

- October 2018 Installation pip install --user pipenv

- October 2018 Pipfile anatomy Specify the packages we want Production and development sections Human readable Toml format Specify the python version

- October 2018 Pipfile.lock anatomy Specify the packages we need Json format Machine readable Easy to parse Pinned versions Hashes

- October 2018 Usage Usage

- October 2018 Usage pipenv install creates the virtualenv

- October 2018 Usage

- October 2018 Usage pipenv shell activates the virtualenv

- October 2018 Usage pipenv install <package-name> install a package

- October 2018 Usage pipenv install <package-name> --dev install a package in the development environment

- October 2018 Usage pipenv uninstall <package-name> uninstall a package

- October 2018 Usage pipenv clean uninstall packages not specified in Pipfile.lock

- October 2018 Usage pipenv graph Displays currently installed dependency graph information

- October 2018 Usage pipenv run command runs a command inside the virtualenv without activating it

- October 2018 Usage pipenv check checks for security vulnerabilities

- October 2018 Usage pipenv lock -r > requirements.txt generates a requirements.txt file

- October 2018 Usage pipenv install -r requirements.txt imports a requirements.txt file

- October 2018 Usage load .env files automatically

- October 2018 usage pipenv install -c . can discover requirements from the codebase

- October 2018 usage

- October 2018 usage pipenv check --unused . show potentially unused dependencies

- October 2018 usage

- October 2018 Integration Integration

- October 2018 Integration with pyenv pipenv --python 3.4.1 install integrates well with pyenv

- October 2018 Integration with pyenv

- October 2018 Integration with docker

- October 2018 Integration with platforms and editors integrated with platforms and editors Heroku (Cloud Hosting) Platform.sh (Cloud Hosting) PyUp (Security Notification) Emacs (Editor Integration) Fish Shell (Automatic $ pipenv shell!) VS Code (Editor Integration) PyCharm (Editor Integration)

- October 2018 utility Utility

- October 2018 utility Pipenv Pipes https://github.com/gtalarico/pipenv-pipes Pipenv Environment Switcher

- October 2018 utility

- October 2018 caveats Caveats

- October 2018 caveats It’s slow when locking dependencies Always tries to update dependencies by default

- October 2018 alternatives Alternatives

- October 2018 alternatives Poetry https://poetry.eustace.io/ Hatch https://github.com/ofek/hatch

- October 2018 thanks Thank you! Questions? @avallbona

- October 2018 resources of interest https://www.pythonforbeginners.com/basics/how-to-use-pip-and-pypi https://realpython.com/pipenv-guide/ https://www.kennethreitz.org/essays/announcing-pipenv https://nvie.com/posts/better-package-management/ https://nvie.com/posts/pin-your-packages/ https://medium.com/@jimjh/managing-dependencies-in-python-applications-b9c93dda98c2

- October 2018 resources of interest https://www.promptworks.com/blog/pin-all-dependencies https://www.well-typed.com/blog/2008/04/the-dreaded-diamond-dependency-problem/ https://medium.com/@DJetelina/pipenv-review-after-using-in-production-a05e7176f3f0 https://chriswarrick.com/blog/2018/07/17/pipenv-promises-a-lot-delivers-very-little/ https://np.reddit.com/r/Python/comments/8jd6aq/why_is_pipenv_the_recommended_packaging_tool_by/ http://journal.kennethreitz.org/entry/r-python

Pipenv! Python dev workflow for humans.

Pipenv! Python dev workflow for humans.

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