importer.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Sat May  1 11:54:40 2021

@author: maherme
"""

import os.path
import types
import sys

print('Running importer.py')

def import_(module_name, module_file, module_path):
    if module_name in sys.modules:
        return sys.modules[module_name]
    
    module_rel_file_path = os.path.join(module_path, module_file)
    module_abs_file_path = os.path.abspath(module_rel_file_path)
    
    # read source code from file
    with open(module_rel_file_path, 'r') as code_file:
        source_code = code_file.read()

    # create a module object
    mod = types.ModuleType(module_name)
    mod.__file__ = module_abs_file_path
    
    # set a ref in sys.modules
    sys.modules[module_name] = mod
    
    # compile source code
    code = compile(source_code, filename=module_abs_file_path, mode='exec')
    
    # execute compiled source code
    exec(code, mod.__dict__)
    
    return sys.modules[module_name]