Solved Modular plugin programming

Hi All,

I'm writing a plugin that imports, processes and exports 3d files (whatever cinema4d supports). It has two way of working:

  1. using parameter -scene, it checks merges all the top level objects and check if there are duplicates, and then checks if the object is already stored in a database
  2. using parameter -object, it just merges everything in the scene (removing cameras lamps etc) and then exports the object

I wanted to keep the code in modules, storing the first part in a and the second one in and here comes the problems. I don't know if it's because the plugin is in a .pyp file, but the import just doesn't work.
What should I do to keep the code modular?


there should be no problem importing *.py files form a *.pyp file. What do you mean with "import just doesn't work."?

For example: you can have a file (next to your *.pyp) that looks like this:

def SomeCalculation():

    return 5

you can import int in your *.pyp just with

import formulas

and then use

number = formulas.SomeCalculation()

It gets a little bit more complicated if you want to register plugins in your sub-modules. In that case you would have to hand over the __res__ structure to these modules.

best wishes,

Let me share you an example.

This is a simple hello world program.
In 'hello.pyp' I have (how do I format the text to code?):

import c4d
import sys
import hello_function

def PluginMessage(id, data):
        hello_function.say('Hello World')
        return True
    return False

In '' I have:

def say(word):

When I run this from commandline, in the console I get the error that the hello_function package has not being found. They're on the same folder. I don't see any reason why this is not working


you find information on how to format code in this thread: How to Post Questions.

best wishes,


Any hint why the hello world code I wrote is not working?


you might have to add the pyp file path to the system path using:



import sys
import os

import hello_function

best wishes,