python质量控制

def average(values):
　　"""Computes the arithmetic mean of a list of numbers.
　　>>> print average([20, 30, 70])
   40.0
   """
   return sum(values,0.0)/ len(values)
import doctest
doctest.testmod()# automatically validate the embedded tests

import unittest

class TestStatisticalFunctions(unittest.TestCase):

    def test_average(self):
        self.assertEqual(average([20, 30, 70]), 40.0)
        self.assertEqual(round(average([1, 5, 7]), 1), 4.3)
        self.assertRaises(ZeroDivisionError, average, [])
        self.assertRaises(TypeError, average, 20, 30, 70)

unittest.main() # Calling from the command line invokes all tests