[Python-ideas] Why is design-by-contracts not widely adopted?

[Robert Collins]

On Thu, 27 Sep 2018 at 00:44, Marko Ristin-Kaufmann
<marko.ristin at gmail.com> wrote:
>
> P.S. My offer still stands: I would be very glad to annotate with contracts a set of functions you deem representative (e.g., from a standard library or from some widely used library). Then we can discuss how these contracts. It would be an inaccurate estimate of the benefits of DbC in Python, but it's at least better than no estimate. We can have as little as 10 functions for the start. Hopefully a couple of other people would join, so then we can even see what the variance of contracts would look like.

i think requests would be a very interesting library to annotate. Just
had a confused developer wondering why calling an API with
session.post(...., data={...some object dict here}) didn't work
properly. (Solved by s/data/json), but perhaps illustrative of
something this might help with?

-Rob