Script creates new Sweep Nurbs object from selected edge

SweepNObject_from_EdgeSelection.py

import c4d
from c4d import utils

# This script creates new Sweep Nurbs object from selected edge
# Author: Mike Udin, 
# Tutorial here http://mikeudin.net/2017/01/10/cinema-4d-python-send-modelling-command
# 2016

def main():

    settings = c4d.BaseContainer()  
        
    res = utils.SendModelingCommand(command = c4d.MCOMMAND_EDGE_TO_SPLINE,
                                    list = [op],
                                    mode = c4d.MODELINGCOMMANDMODE_EDGESELECTION,
                                    bc = settings,
                                    doc = doc)
               
    sweep = c4d.BaseObject(5118)
    
    circle = c4d.BaseObject(5181)
    circle[c4d.PRIM_CIRCLE_RADIUS] = 5
    
    circle.InsertUnder(sweep)
    op.GetDown().InsertAfter(circle)
    
    doc.InsertObject(sweep)
    c4d.EventAdd()
    

if __name__=='__main__':
    main()