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

Gregory P. Smith greg at krypto.org
Wed Apr 22 05:35:21 CEST 2015

On Tue, Apr 21, 2015 at 10:55 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.

Thanks!

I like your focus on particular packages of note such as django and requests.

How do CDNs influence these "lies"? I thought the download counts on PyPI were effectively meaningless due to CDN mirrors fetching and hosting things?

Do we have user-agent logs from all PyPI package CDN mirrors or just from the master?

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