example of exception in python for balanced

gistfile1.py

    def addClient(self, email, cardUri):
        try:
            client = balanced.Marketplace.my_marketplace.create_buyer(email, cardUri)
            
            return True
        except balanced.exc.HttpError as e:
            if e.category_code == "duplicate-email-address":
                buyer = balanced.Account.query.filter(email_address=email)
                print buyer
                buyer = buyer[0]
                buyer.add_card(cardUri)
            else:
                print e
        
        return False