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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_weights(self, save_file):
 """Initialize the weights from the given save_file. Assumes that the graph has been constructed, and the save_file contains weights that match the graph. Used to set the weights to a different version of the player without redifining the entire graph."""

        tf.train.Saver().restore(self.sess, save_file)