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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 getLastRabaId(self, cls) : 		"""keep track all loaded raba classes"""

		self.loadedRabaClasses[cls.__name__] = cls
		sql = 'SELECT MAX(raba_id) from %s LIMIT 1' % (cls.__name__)
		cur = self.execute(sql)
		res = cur.fetchone()
		try :
			return int(res[0])+1
		except TypeError:
			return  0