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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 getConnectionStats(self):
 """Returns dictionary with number of connections for each database. @return: Dictionary of database connection statistics. """

        cur = self._conn.cursor()
        cur.execute("""SELECT datname,numbackends FROM pg_stat_database;""")
        rows = cur.fetchall()
        if rows:
            return dict(rows)
        else:
            return {}