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Part 1 Introduction to Python Packages

thefern profile image Fernando B ๐Ÿš€ Originally published at kodaman2.github.io on ใƒป2 min read

This will be the first article in the series, where I intent to show you everything about Python Packaging. Well maybe not everything, but everything you need to know about creating a self contained module that you can deploy to the Python Packing Index aka PyPi, and Github for the world to consume.

The list as of today for the topics in the series

  • Introduction to Python Packages
  • A Basic Package
  • Another Package with Cookiecutter
  • Argparse and Script Entry Points
  • Package and Deployment

Why should you ever need a package?

If you are a programmer, and chances are 99% certain since you are reading this article. There comes a time where a lightbulb goes off in your head. You have an idea for a wonderful python project. Even better you think it would benefit the community or certain group. It can be a tool, helper functions, even a small script. Whatever the idea might be, publishing a package can make sure your work is available for others to use, or even future you should something happen to your computer. (Yeah I know thatโ€™s the monitor lol)

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Benefits of using a package manager

Package Installer for Python (pip) is not the only package manager out there. There are other managers which youโ€™ve probably used, homebrew, apt-get, rpm, and the list goes on and on.

We will concentrate in pip, since it is built around python and is cross platform, and well documented. In addition you can easily install other pip packages, and dependencies for your project. You can create multi-platform package. You can easily install/update via simple commands.

What does a package manager actually do?

Package managers attempt to solve one problem, and that is to make it easy and accessible for users to download modules, while at the same time assisting programmers to build packages in a sane way by providing the tools required for deployment. Imagine if each time someone needed to print a statement, they had to go the internet to download some awesome print module, then copy and paste in a designated folder. What happens if that print module got a new version, now you have to rinse and repeat.

One does not think much of what it takes to maintain a package until you have to maintain a package. Update repo, version, contributors list, distributables, etc.

The basic premise of pip is that it is a full cmd utility.

  • pip install some_package
  • pip search some_package
  • pip install some_package โ€“upgrade
  • pip uninstall some_package
  • pip install git+https://github.com/some\_repo/a\_repo.git
  • pip freeze > requirements.txt (Sends a list of installed packages to a text file)
  • pip install -r requirements.txt (Where requirements is one package per line, awesome when building a new virtualenv)

Next article

Ok, lots of good information in this article. In the next one we will setup our development environment, and create a basic package. Thanks for reading!

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Diego bruning

๐Ÿ‘ very good

i am learning python and your article will help