>>> LL

[1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21]

>>> L

[3, 4, 5, 6, 7, 8, 9]

>>> l

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

>>>

>>>

>>> sum(L)

42

>>> sum(LL)

121

>>> sum(l)

45

>>> # 以上是求一个python列表的和的例子

...

>>> # 以下测试能不能求一个Pythontumple的和

... 

>>> t = (1,2,3,4,5,6,7,8,9,20)

>>> t

(1, 2, 3, 4, 5, 6, 7, 8, 9, 20)

>>> sum(t)

65

>>> # 通过测试可知，可以求一个tumple的和

...

>>> # 以下测试能否求一个字典的和

...

>>> d = {'a':1,'b':2,  'c':3}

>>> d

{'a': 1, 'c': 3, 'b': 2}

>>> sum(d)

Traceback (most recent call last):

  File "<stdin>", line 1, in <module>

TypeError: unsupported operand type(s) for +: 'int' and 'str'

>>> # 可知，求字典的值是不可以的

...

>>>