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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 app_loader(app, entry_points=None, modules=None):
 """Run default application loader. :param entry_points: List of entry points providing to Flask extensions. :param modules: List of Flask extensions. .. versionadded: 1.0.0 """

    _loader(app, lambda ext: ext(app), entry_points=entry_points,
            modules=modules)