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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 blueprint_loader(app, entry_points=None, modules=None):
 """Run default blueprint loader. The value of any entry_point or module passed can be either an instance of ``flask.Blueprint`` or a callable accepting a ``flask.Flask`` application instance as a single argument and returning an instance of ``flask.Blueprint``. :param entry_points: List of entry points providing to Blueprints. :param modules: List of Blueprints. .. versionadded: 1.0.0 """

    url_prefixes = app.config.get('BLUEPRINTS_URL_PREFIXES', {})

    def loader_init_func(bp_or_func):
        bp = bp_or_func(app) if callable(bp_or_func) else bp_or_func
        app.register_blueprint(bp, url_prefix=url_prefixes.get(bp.name))

    _loader(app, loader_init_func, entry_points=entry_points, modules=modules)