"""
working with 30000000 elements
number bytes required 0.030000 GB
works
working with 300000000 elements
number bytes required 0.300000 GB
works
working with 3000000000 elements
number bytes required 3.000000 GB
works
working with 30000000000 elements
number bytes required 30.000000 GB
works
working with 300000000000 elements
number bytes required 300.000000 GB
IOError(28, 'No space left on device')
working with 3000000000000 elements
number bytes required 3000.000000 GB
IOError(28, 'No space left on device')
"""
creating realy huge scipy array