Apply a custom function to each column of a pandas dataframe

Let say I have below dataframe

import pandas as pd
Dat = pd.DataFrame({'a' : [1,2], 'b' : [3,4]})

def MyFunc(x, y) :
  return x + y ** (.5)

Now I want to apply above custom function to elements of each of the columns of Dat.

Is there any function/method to achieve this?

I have gone through different suggestions over internet, however all of them talk mainly application of standard python function e.g. sum()

Any pointer will be very helpful.

>Solution :

You don’t need a function, you can use directly:

Dat.iloc[0]+Dat.iloc[1]**.5

If really you need the function:

MyFunc(Dat.iloc[0], Dat.iloc[1])

Or:

tmp = Dat.T

MyFunc(tmp[0], tmp[1])

Output:

a    2.414214
b    5.000000
dtype: float64