At EuroPython 2014, there was a talk about "What Python can learn from Haskell", which was very interesting, and seems to have sparkled the PEP 484 (type annotations in python 3.5). This shows once more that sharing between languages can result in improvements for everybody involved.
In this talk, we take another look at Haskell. However, rather than looking at the language itself, we'll look at how the community finds ideas for tools and libraries by exploring the "design space"
I gave this talk at EuroPython 2015. The quality of the video is not very good (my blue-coloring vga output doesn't help), so here is a link to the slides.