Now I want the main script to talk to the python tag script and hand over some information.

I do it in an incredibly hacky way, and like to know if this is appropriate, or if there is a more elegant/reliable way to do it?

def add_python_tag(obj, crtl1, crtl2):
    if not obj:
        return

    pos_1 = get_global_position(crtl1)
    pos_2 = get_global_position(crtl2)

    distance_init = (pos_1 - pos_2).GetLength()

    python_tag = c4d.BaseTag(c4d.Tpython)

    python_code = """

import c4d

def main():

    #some more code ...

    pos_1 = get_global_position(ctrl_01)
    pos_2 = get_global_position(ctrl_02)

    distance_const = distance_init

    distance = (pos_1 - pos_2).GetLength()
    stretch_coefficient = distance_const / distance

    # and even more code ... 


# Execution
if __name__ == '__main__':
    main()

"""
    
    python_code = python_code.replace("distance_init", str(distance_init))

    python_tag[c4d.TPYTHON_CODE] = python_code
    obj.InsertTag(python_tag)

    c4d.EventAdd()