Dataframe Apply method to return multiple elements (series)

Question

import pandas as pd

Let\'s say I have a dataframe like so:

df = pd.DataFrame({\"a\":range(4),\"b\":range(1,5)})
         


        

Answer 1

df["e"], df["f"] = zip(*df.apply( lambda x: divideAndMultiply(x["a"],2) , axis =1))

Should do the trick.

(I show this example so you can see how to use multiple columns as the input to create multiple new columns)