code: def setUp(self):
      super(TestDecodingLongBlock, self).setUp()
      self.blocksize = 1024 * 8 * 2
  
imports: from __future__ import division
  from timeside.plugins.decoder.array import ArrayDecoder
  from unit_timeside import *
  import numpy
label_desc: Use image node_id 1 for calling the TestDecodingLongBlock obj's underlying member method code with example usage: obj.setUp() without return types