def testE100(self):
     self.assertEqual(round(hw.e(100),4), 2.7183)
 def testE100(self):
     self.assertEqual(round(hw.e(100), 4), 2.7183)
 def testE10(self):
     self.assertEqual(round(hw.e(10),2), 2.72)
 def testE10(self):
     self.assertEqual(round(hw.e(10), 2), 2.72)