Power BI: How to use Python with multiple tables in the Power Query Editor?

Question

How can you create a new table with a Python script that uses two existing tables as input? For example by performing a left join using pandas merge?

Answer 1

You can create a Blank Query and replace its contents in Advanced Editor:

let
    Source = Python.Execute("# Python:#(lf)",[df1=Table1, df2=Table2])
in
    Source

After you can click on the gear by the Source to add your python code where you can use df1 and df2.