1.for迴圈

li = ['a','b','c',1,2,{a}]
> for i in li:
>     print(i)
a
b
c
1
2
{10}

2.enumerate

> li = ['a','b','c',1,2,{a}]
> for i,j in enumerate(li,10):
>     print(i,j)
10 a
11 b
12 c
13 1
14 2
15 {10}

3.range和xrange

在python3中range和xrange用法一致了
在python2中還是有區別的,在於是否是迭代器

> print(range(16))
> print('因為現在range(16)是迭代器,所以上面不顯示全')
> print(list(range(16)))
> print(list(range(2,16)))
> print(list(range(1,16,2)))
> print(list(range(1,16,3)))
range(0, 16)
因為現在range(16)是迭代器
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
[2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
[1, 3, 5, 7, 9, 11, 13, 15]
[1, 4, 7, 10, 13]