"Need to know" might be a stretch but you should be familiar with it. There's several times I've come across something in R or Matlab that I want to do in Pyth

"Need to know" might be a stretch but you should be familiar with it. There's several times I've come across something in R or Matlab that I want to do in Python, and it's easier to port over code/processes if you have an awareness. I'm a thousand times better at Python then R/Matlab but being familiar with them has helped me a lot. Since this is a data scientist thread, n=1