For example, the master file is named test.org with the following content:
#+title: test
* test
#+BEGIN_SRC python :exports results :results output raw
#! /usr/bin/env python
# -*- coding: utf-8 -*-
print('#+include: "hello.org"')
#+END_SRC
hello.org is in the current folder with the following content:
* hello world
run org-export-to-odt in the buffer of test.org doesn't include hello.org.