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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 copy(self):
 """Returns a copy of the projection matrix"""

        params = {}
        for key, val in self.__dict__.items():
            if 'matrix' not in key:
                k = key[1:] if key[0] == '_' else key
                params[k] = val
        # params = {param: params[param] for param in params}
        return self.__class__(**params)