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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 determine_2(self, container_name, container_alias, meta, val):
 """"Default the alias to the name of the container"""

        if container_alias is not NotSpecified:
            return container_alias
        return container_name[container_name.rfind(":")+1:].replace('/', '-')