Python- compress lower end of y-axis in contourf plot

The issue I have a contourf plot I made with a pandas dataframe that plots some 2-dimensional value with time on the x-axis and vertical pressure level on the y-axis. The field, time, and pressure …

How to fix “only integers, slices (`:`), ellipsis (`…`), numpy.newaxis (`None`) and integer or boolean arrays are valid indices” in this example

I have the following type of data. This is what I tried: And I got the error. Answer All you should need is: