# Source code for sqlobject.util.moduleloader

    import os
    import sys
    from sqlobject.compat import load_module_from_file

    def load_module(module_name):
        mod = __import__(module_name)
        components = module_name.split('.')
        for comp in components[1:]:
            mod = getattr(mod, comp)
        return mod

    def load_module_from_name(filename, module_name):
        if module_name in sys.modules:
            return sys.modules[module_name]
        init_filename = os.path.join(os.path.dirname(filename), '__init__.py')
        if not os.path.exists(init_filename):
            try:
                f = open(init_filename, 'w')
            except (OSError, IOError) as e:
                raise IOError(
                    'Cannot write __init__.py file into directory %s (%s)\n'
                    % (os.path.dirname(filename), e))
            f.write('#\n')
            f.close()
        if module_name in sys.modules:
            return sys.modules[module_name]
        if '.' in module_name:
            parent_name = '.'.join(module_name.split('.')[:-1])
            base_name = module_name.split('.')[-1]
            load_module_from_name(os.path.dirname(filename), parent_name)
        else:
            base_name = module_name
        return load_module_from_file(base_name, module_name, filename)