Get Python Requirements Package Hashes

By  on  

Python's (pip's) requirements.txt file is the equivalent to package.json in the JavaScript / Node.js world.  This requirements.txt file isn't as pretty as package.json but it not only defines a version but goes a step further, providing a sha hash to compare against to ensure package integrity:

Flask==0.12.1 \
Jinja2==2.9.6 \
MarkupSafe==1.0 \


Coming from the JavaScript / package.json world, you only need to provide the package name and version.  To get the hash of a python package, you can use hashin.  The first step is installing hashin:

pip install hashin

Once hashin is installed, you can get the package hash easily:

hashin Flask==0.12.1

The code above adds the package name, version, and available hashes to your requirements.txt file automatically.  Unfortunately I'm not aware of a method for recursive hashin checks, so if a package dependency doesn't use hashes, you'll need to run hashin for each of those packages manually.

Recent Features

  • By
    5 More HTML5 APIs You Didn’t Know Existed

    The HTML5 revolution has provided us some awesome JavaScript and HTML APIs.  Some are APIs we knew we've needed for years, others are cutting edge mobile and desktop helpers.  Regardless of API strength or purpose, anything to help us better do our job is a...

  • By
    CSS vs. JS Animation: Which is Faster?

    How is it possible that JavaScript-based animation has secretly always been as fast — or faster — than CSS transitions? And, how is it possible that Adobe and Google consistently release media-rich mobile sites that rival the performance of native apps? This article serves as a point-by-point...

Incredible Demos


  1. I think in your second snippet you mean hashin Flask==0.12.1.

    Also, hashin works by just specifying the package name. It’ll then install the latest version. E.g. hashin Flask.

  2. Check out for getting both recursive checks and hashes.

  3. F Fouvry

    pip-compile (from pip-tools) can generate hashes in a requirements file, using the option --generate-hashes.

Wrap your code in <pre class="{language}"></pre> tags, link to a GitHub gist, JSFiddle fiddle, or CodePen pen to embed!