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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def resource_filename_mod_entry_point(module_name, entry_point):
 """ If a given package declares a namespace and also provide submodules nested at that namespace level, and for whatever reason that module is needed, Python's import mechanism will not have a path associated with that module. However, if given an entry_point, this path can be resolved through its distribution. That said, the default resource_filename function does not accept an entry_point, and so we have to chain that back together manually. """


    if entry_point.dist is None:
        # distribution missing is typically caused by mocked entry
        # points from tests; silently falling back to basic lookup
        result = pkg_resources.resource_filename(module_name, '')
    else:
        result = resource_filename_mod_dist(module_name, entry_point.dist)

    if not result:
        logger.warning(
            "resource path cannot be found for module '%s' and entry_point "
            "'%s'", module_name, entry_point
        )
        return None
    if not exists(result):
        logger.warning(
            "resource path found at '%s' for module '%s' and entry_point "
            "'%s', but it does not exist", result, module_name, entry_point,
        )
        return None
    return result