`

    import quickfix
    import quickfix42

    noMDEntries = quickfix.NoMDEntries()
    message.getField(noMDEntries)

    group = quickfix42.MarketDataSnapshotFillRefresh.NoMDEntries()
    MDEntryType = quickfix.MDEntryType()
    MDEntryPx = quickfix.MDEntryPx()
    MDEntrySize = quickfix.MDEntrySize()
    orderID = quickfix.OrderID();

    message.getGroup(1, group);
    group.getField(MDEntryType);
    group.getField(MDEntryPx);
    group.getField(MDEntrySize);
    group.getField(orderID);

    message.getGroup(2, group);
    group.getField(MDEntryType);
    group.getField(MDEntryPx);
    group.getField(MDEntrySize);
    group.getField(orderID);

`