How to draw arrows and arcs in a contour plot using Python matplotlib

Question

I have made a contour plot like that using Python Matplot lib

I would like to know how can I add arrows like those white ones, and something like this little arc on bellow the angle theta (to show the angle)

It wold be really helpful

Thank you.

Answer 1

You could use pyplot.annotate() . Here is a tutorial with example code.