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MemoryError creating recarrays from medium sized python objects (Trac #479) #1077
The next exposes the (weird) behaviour:
The memory of my machine is 512 MB, and the recarray + python object should fit in far less than 1 MB.
Curiously enough, you can achieve the desired recarray by using a regular numpy array
But note the strange nesting of the resulting recarray (see ticket #1076).