一些數據類型

>>> line = "GOOD, 100, 490.10"
>>> types = [str, int, float]
>>> types
[<type 'str'>, <type 'int'>, <type 'float'>]
>>> line_list = line.split(",")
>>> line_list
['GOOD', ' 100', ' 490.10']
>>> [t(l) for t, l in zip(types, line_list)]
['GOOD', 100, 490.1]

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all()和any()， all是全部項都是真纔是true， any有一項是真就是ture

>>>a = [1,0,0,0]                                                 
>>>any(a)
True
>>>all(a)
False

>>> a = [1,2,3,0]
>>> any(a)
True
>>> all(a)
False
>>> sum(a)
6

list中的reverse（）和sort（）直接操做列表元素，返回None