• .pop() on a pandas dataframe

  • I knew you could call .pop(key) on a python dictionary, but didnt realize you could call it on a dataframe as well. Performs same as it would on a dictionary; returns series and removes series from original dataframe

I was reading some stuff in scikit learn's docs, and they used a '%' oddly, so I looked it up. Apparently:

If the first argument is a string, it formats it using the second argument. This is a bit involved, so I will refer to the documentation, but just as an example:

>>> "foo %d bar" % 5
'foo 5 bar'

That's the absolute worst, please never use this.