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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 initialize(self, *args):
 """Initialize a recommender by resetting stored users and items. """

        # number of observed users
        self.n_user = 0

        # store user data
        self.users = {}

        # number of observed items
        self.n_item = 0

        # store item data
        self.items = {}