# for blender
# resets the radius used by the skin modifier to the desired value

import bpy
import math

def set_all_vertex_skin_radius(obj, radius):
    for v in obj.data.skin_vertices:
        for d in v.data:
            d.radius = (radius,radius)

def main():
    set_all_vertex_skin_radius(bpy.context.active_object, 1)

main()