How can I create a fields plot on a line with pyaedt in Ansys Maxwell?

[pasc1377]

I want to plot the flux density in the air gap along a line. I can do it manually and also in the old IronPython, but not with pyaedt. Can anyone help me?

I've tried something like:
m2d.post.create_report( expressions="Mag_B", domain="Sweep", variations={"Time": "9375000ns"}, primary_sweep_variable="Time", report_category="Fields", plot_type="Rectangular Plot", polyline_points=1001, plot_name="Test", )

Many thanks in advance.