human
Solve the following python programming problem given the following code:
@ patch.object (SuiteImporter, 'import_suites') 
def test_unknown_exception_rollback(self, new_import_suites) : 
    '
        An unknown exception is thrown by the import_suites method of
        SuiteImporter, so the entire transaction is rolled back and no
        cases are imported.
        ' 
    case_suite_data = { 
        'suites' : [{ 
            'name' : 'FooSuite', 
            'description' : 'indescribable', 
}], 
        'cases' : [{ 
            'name' : 'FooCase', 
            'steps' : [{ 
                'instruction' : 'do this', 
}], 
}, { 
            'name' : 'BarCase', 
            'steps' : [{ 
                'instruction' : 'do this', 
}], 
}], 
} 
    class SurpriseException (RuntimeError) : 
        pass 
def raise_exception() : 
        raise SurpriseException ('Surprise!') 
new_import_suites.side_effect = self 
    with self.assertRaises (SurpriseException) : 
        self.import_data (case_suite_data) 
self.assertEqual (self.model.Case.objects.count (), 0) 
    self.assertEqual (self.model.CaseVersion.objects.count (), 0) 

    
    

    Fix the buggy line: new_import_suites.side_effect = self
assistant
#Here is Python code to fix the buggy line: new_import_suites.

new_import_suites.side_effect = def raise_exception(