How to Decompose path with attributes by scripting?

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How can perform something similar to “Right Click > Expand Outline” by scripting ?
(To pass from pic1 to pic2)

Capture d’écran 2023-02-02 à 11.33.09
Capture d’écran 2023-02-02 à 11.33.091216×1376 72 KB

Capture d’écran 2023-02-02 à 11.35.39
Capture d’écran 2023-02-02 à 11.35.391124×1320 73.3 KB

2 
l = Layer.copy()
l.flattenOutlines()
Layer.shapes = l.shapes.copy()
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