[Python-Dev] Python 3.x Adoption for PyPI and PyPI Download Numbers (original) (raw)

Guido van Rossum guido at python.org
Tue Apr 21 20:01:15 CEST 2015

Thanks for the detailed research!

On Tue, Apr 21, 2015 at 10:54 AM, Donald Stufft <donald at stufft.io> wrote:

Just thought I'd share this since it shows how what people are using to download things from PyPI have changed over the past year. Of particular interest to most people will be the final graphs showing what percentage of downloads from PyPI are for Python 3.x or 2.x.

As always it's good to keep in mind, "Lies, Damn Lies, and Statistics". I've tried not to bias the results too much, but some bias is unavoidable. Of particular note is that a lot of these numbers come from pip, and as of version 6.0 of pip, pip will cache downloads by default. This would mean that older versions of pip are more likely to "inflate" the downloads than newer versions since they don't cache by default. In addition if a project has a file which is used for both 2.x and 3.x and they do a pip install on the 2.x version first then it will show up as counted under 2.x but not 3.x due to caching (and of course the inverse is true, if they install on 3.x first it won't show up on 2.x). Here's the link: https://caremad.io/2015/04/a-year-of-pypi-downloads/ Anyways, I'll have access to the data set for another day or two before I shut down the (expensive) server that I have to use to crunch the numbers so if there's anything anyone else wants to see before I shut it down, speak up soon. --- Donald Stufft PGP: 7C6B 7C5D 5E2B 6356 A926 F04F 6E3C BCE9 3372 DCFA

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