old_contents: import unittest
  from ahupythonpackage import standard_deviation
  from ahupythonpackage import standard_error
  
  class MyTest(unittest.TestCase):
  	def test_valid_cases(self):
  		self.assertEqual(standard_deviation([0]), 0)
  		self.assertEqual(standard_error([0]), 0)
  
  		self.assertEqual(standard_deviation([1]), 0)
  		self.assertEqual(standard_error([1]), 0)
  
  		self.assertEqual(standard_deviation([0,0,0]), 0)
  		self.assertEqual(standard_error([0,0,0]), 0)
  
  		self.assertEqual(standard_deviation([1,1,1]), 0)
  		self.assertEqual(standard_error([1,1,1]), 0)
  
  		self.assertEqual(standard_deviation([0,1,2]), 0.816496580927726)
  		self.assertEqual(standard_error([0,1,2]), 0.47140452079103173)
  
  		self.assertEqual(standard_deviation([0,-1,-2]), 0.816496580927726)
  		self.assertEqual(standard_error([0,-1,-2]), 0.47140452079103173)
  		
  		list = []
  		for i in range(10000):
  			list.append(i)
  
  		self.assertEqual(standard_deviation(list), 2886.751331514372)
  		self.assertEqual(standard_error(list), 28.867513315143718)
  		
  		list = []
  		for i in range(9999999):
  			list.append(i)
  		
  		self.assertEqual(standard_deviation(list), 2886751.0572787286)
  		self.assertEqual(standard_error(list), 912.8708835335426)
  		
  		print("Valid Test Cases has been verified!")
  
  	def test_error_cases(self):
  		self.assertRaises(ZeroDivisionError, standard_deviation, [])
  		self.assertRaises(ZeroDivisionError, standard_error, [])
  		
  		self.assertRaises(TypeError, standard_deviation, [""])
  		self.assertRaises(TypeError, standard_error, [""])
  		
  		self.assertRaises(TypeError, standard_deviation, [0,""])
  		self.assertRaises(TypeError, standard_error, [0,""])
  		
  		self.assertRaises(TypeError, standard_deviation, None)
  		self.assertRaises(TypeError, standard_error, None)
  		
  		self.assertRaises(ZeroDivisionError, standard_deviation, "")
  		self.assertRaises(ZeroDivisionError, standard_error, "")
  		
  		self.assertRaises(ZeroDivisionError, standard_deviation, {})
  		self.assertRaises(ZeroDivisionError, standard_error, {})
  
  my_test = MyTest()
  my_test.test_valid_cases()
  my_test.test_error_cases()
  
new_contents: import unittest
  from ahupythonpackage import standard_deviation
  from ahupythonpackage import standard_error
  
  class MyTest(unittest.TestCase):
  	def test_valid_cases(self):
  		self.assertEqual(standard_deviation([0]), 0)
  		self.assertEqual(standard_error([0]), 0)
  
  		self.assertEqual(standard_deviation([1]), 0)
  		self.assertEqual(standard_error([1]), 0)
  
  		self.assertEqual(standard_deviation([0,0,0]), 0)
  		self.assertEqual(standard_error([0,0,0]), 0)
  
  		self.assertEqual(standard_deviation([1,1,1]), 0)
  		self.assertEqual(standard_error([1,1,1]), 0)
  
  		self.assertEqual(standard_deviation([0,1,2]), 0.816496580927726)
  		self.assertEqual(standard_error([0,1,2]), 0.47140452079103173)
  
  		self.assertEqual(standard_deviation([0,-1,-2]), 0.816496580927726)
  		self.assertEqual(standard_error([0,-1,-2]), 0.47140452079103173)
  		
  		list = []
  		for i in range(10000):
  			list.append(i)
  
  		self.assertEqual(standard_deviation(list), 2886.751331514372)
  		self.assertEqual(standard_error(list), 28.867513315143718)
  		
  		list = []
  		for i in range(9999999):
  			list.append(i)
  		
  		self.assertEqual(standard_deviation(list), 2886751.0572787286)
  		self.assertEqual(standard_error(list), 912.8708835335426)
  		
  		print("Valid Test Cases has been verified!")
  
  	def test_error_cases(self):
  		self.assertRaises(ZeroDivisionError, standard_deviation, [])
  		self.assertRaises(ZeroDivisionError, standard_error, [])
  		
  		self.assertRaises(TypeError, standard_deviation, [""])
  		self.assertRaises(TypeError, standard_error, [""])
  		
  		self.assertRaises(TypeError, standard_deviation, [0,""])
  		self.assertRaises(TypeError, standard_error, [0,""])
  		
  		self.assertRaises(TypeError, standard_deviation, None)
  		self.assertRaises(TypeError, standard_error, None)
  		
  		self.assertRaises(ZeroDivisionError, standard_deviation, "")
  		self.assertRaises(ZeroDivisionError, standard_error, "")
  		
  		self.assertRaises(ZeroDivisionError, standard_deviation, {})
  		self.assertRaises(ZeroDivisionError, standard_error, {})
  
  if __name__ == '__main__':
      unittest.main()
subject: test case fix