old_contents: """Functionality for building tests.
  
  We have to call this file "checks" and not anything with "test" as a
  substring or nosetests will execute it.
  """
  
  from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  
  import numpy as np
  import time
  import unittest
  
  
  class CleverHansTest(unittest.TestCase):
  
    def setUp(self):
      self.test_start = time.time()
      # seed the randomness
      np.random.seed(1234)
  
    def tearDown(self):
      print(self.id(), "took", time.time() - self.test_start, "seconds")
  
    def assertClose(self, x, y, *args, **kwargs):
      # self.assertTrue(np.allclose(x, y)) doesn't give a useful message
      # on failure
      assert np.allclose(x, y, *args, **kwargs), (x, y)
  
new_contents: """Functionality for building tests.
  
  We have to call this file "checks" and not anything with "test" as a
  substring or nosetests will execute it.
  """
  
  from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  
  import time
  import unittest
  
  import numpy as np
  
  class CleverHansTest(unittest.TestCase):
  
    def setUp(self):
      self.test_start = time.time()
      # seed the randomness
      np.random.seed(1234)
  
    def tearDown(self):
      print(self.id(), "took", time.time() - self.test_start, "seconds")
  
    def assertClose(self, x, y, *args, **kwargs):
      # self.assertTrue(np.allclose(x, y)) doesn't give a useful message
      # on failure
      assert np.allclose(x, y, *args, **kwargs), (x, y)
  
subject: fix import order for checks.py