Imports a module specifically from a file.
    
    :param      filename | <str>
    
    :return     <module> || None

def importfile(filename):
    """
    Imports a module specifically from a file.
    
    :param      filename | <str>
    
    :return     <module> || None
    """
    pkg = packageFromPath(filename, includeModule=True)
    root = packageRootPath(filename)

    if root not in sys.path:
        sys.path.insert(0, root)

    __import__(pkg)
    return sys.modules[pkg]