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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_view(self):

 """Clean the tree and view parameters"""

        self.clear()
        self.item_depth = 0   # To be use for collapsing/expanding one level
        self.item_list = []  # To be use for collapsing/expanding one level
        self.items_to_be_shown = {}
        self.current_view_depth = 0