gistfile1.txt

        mock = Mock()
        oid_mock = Mock(side_effect=ImportError('test: No Module named v3'))
 
        modules = {'pysnmp': mock,
                   'pysnmp.asn1': mock.asn1,
                   'pysnmp.asn1.oid': oid_mock,
                   'pysnmp.mapping': mock.mapping,
                   'pysnmp.mapping.udp': mock.mapping.udp,
                   'pysnmp.mapping.udp.role': mock.mapping.udp.role,
                   'pysnmp.proto': mock.proto,
                   'pysnmp.proto.api': mock.proto.api
        }
 
        with patch.dict('sys.modules', modules):
            pytest.raises(ImportError, 'from nav.Snmp.pysnmp_se import Snmp')