python容器类型----列表的使用
python的容器主要包含列表列表,字典
1、列表对象的方法包含:
使用方法如下:
>>> a=[66.6,333,333,1,12333]
>>> print a.count(333)
2
>>> a.insert(0,111)
>>> a
[111, 66.599999999999994, 333, 333, 1, 12333]
>>> a.index(333)
2
>>> a.sort()
>>> a
[1, 66.599999999999994, 111, 333, 333, 12333]
>>> a.reverse()
>>> a
[12333, 333, 333, 111, 66.599999999999994, 1]
>>> a.append(33333)
>>> a
[12333, 333, 333, 111, 66.599999999999994, 1, 33333]
>>> a.remove(333)
>>> a
[12333, 333, 111, 66.599999999999994, 1, 33333]
>>> a.index(66.6)
3
>>> print a
[12333, 333, 111, 66.599999999999994, 1, 33333]
>>> print a.count(333)
2
>>> a.insert(0,111)
>>> a
[111, 66.599999999999994, 333, 333, 1, 12333]
>>> a.index(333)
2
>>> a.sort()
>>> a
[1, 66.599999999999994, 111, 333, 333, 12333]
>>> a.reverse()
>>> a
[12333, 333, 333, 111, 66.599999999999994, 1]
>>> a.append(33333)
>>> a
[12333, 333, 333, 111, 66.599999999999994, 1, 33333]
>>> a.remove(333)
>>> a
[12333, 333, 111, 66.599999999999994, 1, 33333]
>>> a.index(66.6)
3
>>> print a
[12333, 333, 111, 66.599999999999994, 1, 33333]
从上面的试验我们看到66.6变成了66.599999999999994,这个问题我也不清楚是怎么回事,估计跟精度有关系,以后在解决这个问题