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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 get_role(self, key):
 """Return id of named role."""


        json_resp = self.get_roles()
        for item in json_resp:
            if key in item["name"]:
                return item["id"]
        raise CerberusClientException("Key '%s' not found" % key)