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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 import_backend(config):
 """ Imports and initializes the Backend class. """

    backend_name = config['backend']
    path = backend_name.split('.')
    backend_mod_name, backend_class_name = '.'.join(path[:-1]), path[-1]
    backend_mod = importlib.import_module(backend_mod_name)
    backend_class = getattr(backend_mod, backend_class_name)
    return backend_class(config['settings'])