A tiny Python script to draw beautiful circles, with standard library turtle. Demo here.

./cadraw.py [base radius] [circle list] [args...]

base radius is radius of base circle, which is the only full circle in the picture.

circle list is a list of triple tuples. For each tuple, the first element is either 'i' or 'o'. It indicates the circle is inside of base circle or outside of it. The second n and third d are two integers, which mean one component arc of current circle crosses n/d of perimeter of the circle it lives on.

Use --preview to draw circles super fastly, and use --no-scale to disable scaling action per circle.

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