Import polyloader in your python script’s launcher or library, as well as the syntax compiler(s) you plan to use. For example, if you have Mochi and Hy installed, and you wanted to write a Django app, edit manage.py and add the following lines at the top:
from mochi.main import compile_file as mochi_compile
from hy.importer import ast_compile as hy_compile
import polyloader
polyloader.install(mochi_compile, ['.mochi'])
polyloader.install(hy_compile, ['.hy'])}
Now your views can be written in Hy and your models in Mochi, and everything will just work.