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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 normalize(self, timestamp, steps=0):
    '''
    Normalize a timestamp according to the interval configuration. Optionally
    can be used to calculate the timestamp N steps away.
    '''
    # So far, the only commonality with RelativeTime
    return self.from_bucket( self.to_bucket(timestamp, steps) )