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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 policyChange(self, updateParams, func):
 		""" update defaultPolicy dict """

		for k,v in updateParams.items():
			k = k.replace('-','_')
			c = globals()[k](v)
			try:
				self.defaultPolicies[k] = getattr(c,func)(self.defaultPolicies[k])
			except Exception, e:
				raise