Excel VBA to Python code (Filter function)

I’m new to python. Some help would be great, thanks in advance too. I am trying to get the various average salary based on Units.

In Excel, I would do =AVERAGE(FILTER(B:B,A:A=D3)). Where Column B is all the individual salaries and Column A is the various Unit.

I have managed to do an array of the different units:

DiffUnits = df["Unit"].unique()

My data:

Expected result (In the form of a table, if possible):

>Solution :

import pandas as pd

df = pd.DataFrame({'Units': ['IT', 'Math', 'Math', 'Science', 'IT', 'Science'],
                   'Salary': [500, 3000, 1200, 700, 2000, 1800]})

df2 = df.groupby('Units').mean().reset_index()

df2

gives you:

     Units  Salary
0       IT    1250
1     Math    2100
2  Science    1250