prog2

def sv_main(num_verts=20, radius=5):
 
    # in boilerplate, could be less verbose
    in_sockets = [
        [int, 'num_verts',  num_verts],
        [float, 'radius',  radius]
    ]
 
    # arbitrary user code
    from math import sin, cos, pi
    TWO_PI = 2*pi
    v = []
    angle = TWO_PI/num_verts
    for i in range(num_verts):
        theta = angle*i
        v.append((sin(theta)*radius, cos(theta)*radius, 0))
     
    # out boilerplate
    out_sockets = [
        [str, v, 'Vertices']
    ]
 
    return in_sockets, out_sockets
 
if __name__ == "__main__":
    prog2 = sv_main({0},{1})