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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 save(self):
 """Save to database if anything has changed since last load"""

        if ( self._new or
            (self._validID() and self._changed) or
            (self._updated and self._changed > self._updated) ):
            # Don't save if we have not loaded existing data!
            self._saveDB()
            return True
        return False