getting MemoryError with dicts; suspect memory fragmentation

[dmtr]

I'm still unconvinced that it is a memory fragmentation problem. It's
very rare.
Can you give more concrete example that one can actually try to
execute? Like:

python -c "list([list([0]*xxx)+list([1]*xxx)+list([2]*xxx)
+list([3]*xxx) for xxx in range(100000)])" &

-- Dmitry