<｜begin▁of▁sentence｜>### Instruction:
Given a plot object in igraph with a bounding box set to (100, 100) and a white background, can you initialize the CoordinateSystem associated with this plot?
### Response:
from igraph.drawing import Plot
from igraph.drawing.coord import CoordinateSystem

# We create a plot with a pre-defined bounding box
plot = Plot(bbox=(100, 100), background='white')
# Initialize the coordinate system
coord_sys = CoordinateSystem(plot.context, plot.bbox)

# Additional drawing can be done here using coord_sys
# ...

# Save the plot
plot.save('plot_with_coordinate_system.png')
<|EOT|>
