MemoryError Numarray

[Bernhard Reimar Hoefle]

I have the following python script:
#######################################
from numarray import *

while 1:
        a=arange(1,300000000)
        b=a*100/100
        del a
        del b
#######################################

This script crashes after a few minutes with an error:

MemoryError: Couldn't allocate requested memory

How can I avoid python to use new memory space for each loop?
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