def testNumpySTDMultiArrayreturnsSTD(self):
npsy = NumpySciPy()
array = [[500,200],[400,600]]
actual = npsy.numpySTD(array)
expected = 147.9019945774904
self.assertEqual(expected,actual)
def testNumpySTDOneValueArrayreturnsSTD(self):
npsy = NumpySciPy()
array = [500]
actual = npsy.numpySTD(array)
expected = 0.00
self.assertEqual(expected,actual)
