old_contents: import unittest
  
  from calexicon.constants import *
  
  
  class TestConstants(unittest.TestCase):
      def test_constants(self):
          self.assertEqual(number_of_days_in_400_gregorian_years, 365 * 400 + 97)
  
new_contents: import unittest
  
  from calexicon.constants import number_of_days_in_400_gregorian_years
  
  
  class TestConstants(unittest.TestCase):
      def test_constants(self):
          self.assertEqual(number_of_days_in_400_gregorian_years, 365 * 400 + 97)
  
subject: Remove import *.