import numpy import tables fileName = 'carray1.h5' shape = (200, 300) atom = tables.UInt8Atom() filters = tables.Filters(complevel=5, complib='zlib') h5f = tables.open_file(fileName, 'w') ca = h5f.create_carray(h5f.root, 'carray', atom, shape, filters=filters) # Fill a hyperslab in ``ca``. ca[10:60, 20:70] = numpy.ones((50, 50)) h5f.close() # Re-open and read another hyperslab h5f = tables.open_file(fileName) print h5f print h5f.root.carray[8:12, 18:22] h5f.close()