code: def __init__(self, *args, **kwargs):
      Test.__init__(self, *args, dtype="float64", **kwargs)
  
imports: import os
  import unittest
  import uuid
  import gc
  from scipy import sparse
  import numpy
  from tick.array.serialize import serialize_array, load_array
label_desc: Use image node_id 1 to create a new TestFloat64 object from inherited base classes: Test, unittest with example: obj = TestFloat64()