Py Day Mallorca - Pipenv - Python Dev Workflow for Humans

1. Pipenv! Python Dev Workflow for Humans Andreu Vallbona PyDay Mallorca - September 2019

2. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Who am I Andreu Vallbona @avallbona Bachelor degree in computer science Web developer at APSL, Mallorca, Spain Mainly developing with Python and Django

3. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 What we do at APSL Web development Systems engineering - devops Data science Mobile apps Consulting and formation

4. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 What it is? it’s a package and virtualenv managing system it’s aimed to replace the use of pip and virtualenv

5. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 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

6. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Current state of the art Before pipenv we used to create a python environment with virtualenv install some packages freeze the dependencies

7. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 requirements.txt anatomy list of dependencies with pinned versions

8. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Problems Problems

9. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Problems pip and virtualenv are concepts difficult to understand for beginners

10. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Problems requirements.txt is difficult to maintain

11. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Problems we have to remember to update the requirements.txt file

12. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Problems For different environments we need to maintain several requirements.txt files

13. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Problems we do not easily know what python version the project uses

14. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Problems transitive relations A -> B -> C

15. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Solutions Solutions

16. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 What problems does pipenv solve? avoid manually maintenance of the dependencies

17. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 What problems does pipenv solve? easy to know which version of python the project uses

18. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 What problems does pipenv solve? show us the dependencies in a more concise way

19. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 What problems does pipenv solve? update dependencies securely and automatically

20. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 What problems does pipenv solve? allow us to have a default environment and a development environment

21. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Installation Installation

22. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Installation pip install --user pipenv

23. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Pipfile anatomy Specify the packages we want Production and development sections Human readable Toml format Specify the python version

24. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Pipfile.lock anatomy Specify the packages we need Json format Machine readable Easy to parse Pinned versions Hashes

25. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Pipfile.lock anatomy Specify the packages we need Json format Machine readable Easy to parse Pinned versions Hashes

26. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Usage Usage

27. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Usage pipenv install creates the virtualenv

28. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Usage

29. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Usage pipenv shell activates the virtualenv

31. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Usage pipenv install <package-name> install a package

33. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Usage pipenv install <package-name> --dev install a package in the development environment

35. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Usage pipenv uninstall <package-name> uninstall a package

37. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Usage pipenv clean uninstall packages not specified in Pipfile.lock

39. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Usage pipenv graph Displays currently installed dependency graph information

41. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Usage pipenv run command runs a command inside the virtualenv without activating it

43. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Usage pipenv check checks for security vulnerabilities

45. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Usage pipenv lock -r > requirements.txt generates a requirements.txt file

47. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Usage pipenv install -r requirements.txt imports a requirements.txt file

50. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Usage load .env files automatically

52. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 usage pipenv install -c . can discover requirements from the codebase

53. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 usage

54. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 usage pipenv check --unused . show potentially unused dependencies

55. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 usage

56. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Integration Integration

57. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Integration with pyenv pipenv --python 3.4.1 install integrates well with pyenv

58. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Integration with pyenv

59. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Integration with docker

60. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 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)

61. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 utility Utility

62. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 utility Pipenv Pipes https://github.com/gtalarico/pipenv-pipes Pipenv Environment Switcher

63. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 utility

64. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 caveats Caveats

65. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 caveats It’s slow when locking dependencies Always tries to update dependencies by default

66. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 caveats The default It’s update packages always to lastest versions

67. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 caveats But it can be solved !!!

68. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Caveats

69. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 Caveats Or directly pinning all the versions into the Pipfile

70. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 alternatives Alternatives

71. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 alternatives Poetry https://poetry.eustace.io/ Hatch https://github.com/ofek/hatch

72. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 thanks Thank you! Questions? @avallbona

73. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 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

74. Pipenv: Python Dev Workflow for Humans Andreu Vallbona - PyDay Mallorca - September 2019 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

Py Day Mallorca - Pipenv - Python Dev Workflow for Humans

Andreu Vallbona Plazas

Py Day Mallorca - Pipenv - Python Dev Workflow for Humans