 Here is a simplified Python code example using PyAEDT library to create a Maxwell 2D project, run a transient simulation, and plot the results. Please note that this is a basic example and might need adjustments based on your specific project requirements.

```python
from aedt import *
from pyvista import Plotter

# Initialize AEDT session
aedt.initialize()

# Set non-graphical mode
aedt.setOption('NonGraphical', 1)

# Create a new project
project = aedt.createProject('my_project')

# Open the project
project.open()

# Create a Maxwell 2D design
design = project.createDesign('Maxwell 2D')

# Create a rectangle
rectangle = design.createRectangle(0, 0, 1, 1)

# Duplicate the rectangle
duplicate = rectangle.duplicate()

# Create an air region
air_region = design.createAirRegion(0, 0, 2, 2)

# Assign windings to the sheets
rectangle.assignWinding('Winding1')
duplicate.assignWinding('Winding2')

# Assign a balloon to the air region
air_region.assignBalloon('Balloon1')

# Plot the model
design.plot()

# Create a transient setup
transient_setup = design.createTransientSetup()

# Set the transient setup properties
transient_setup.setTimeStep(0.001)
transient_setup.setNumberOfTimeSteps(1000)

# Create a rectangular plot
plot = design.createRectangularPlot()

# Solve the model
design.solve()

# Create output and plot it using PyVista
output = design.getOutput('Winding1', 'H')
data = output.getData()

plotter = Plotter(shape=(640, 480))
plotter.add_mesh(data, show_edges=True, colormap='viridis')
plotter.show()

# Generate the same plot outside AEDT
import numpy as np
import matplotlib.pyplot as plt

plt.imshow(data.to_numpy(), cmap='viridis')
plt.show()

# Close AEDT
aedt.terminate()
```

This code creates a Maxwell 2D project, plots the model, runs a transient simulation, generates and plots the results using PyVista, and generates the same plot outside AEDT. It also closes the AEDT session at the end.