PyCon UK 2019

Nick Sarbicki

I'm a consultant Python developer helping teams to solve a variety of problems ranging from fighting fake news with ML to scaling sites for Google.

Contributor to Open Source.

Blogger at

Admin of the Python Slack workspace (

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Mutability for good not evil
Nick Sarbicki

Mutability is a common GOTCHA for new pythonistas. So where is it a good idea to use mutability? And more importantly where is it a bad idea?

Ferrier Hall