Python interactive mode history and arrow keys

Question

I was wondering if anyone can explain why all of a sudden in Python interactive mode all arrow keys are failing?

When I press up button for example to go through com

Answer 1

If you are using homebrew, this is an easy fix:

brew uninstall python
brew uninstall readline
brew install readline  --universal
brew install python

That fixed it for me (running OS X Mavericks 10.9.5)