code: def setUp(self):
      np.random.seed(0)
  
imports: import warnings
  from builtins import range
  from unittest import TestCase
  import numpy
  import numpy.testing
  import pandas
  import pandas.testing
  from sklearn.exceptions import NotFittedError
  from tsfresh.transformers.per_column_imputer import PerColumnImputer
label_desc: Use image node_id 1 for calling the PerColumnImputerTestCase obj's underlying member method code with example usage: obj.setUp() without return types