Python Basic Learning (6th day)

1. zip function

1) How the ZIP function works when there is only one parameter.

x = [1, 2, 3]x = zip (x)print X
Output: [(1,), (2,), (3,)]

2) How the ZIP function works when there are no parameters.

x = zip ()print X
Output: []

3)

x = [1, 2, 3]r = Zip (* [x] * 3)print R  

The result of the operation is:

[(1, 1, 1), (2, 2, 2), (3, 3, 3)]

It operates in such a way that:

[x] generates a list of lists that have only one element x

[x] * 3 generates a list of lists, it has 3 elements, [x, X, X]

The meaning of Zip (* [x] * 3) is clear, zip (x, x, x)

2, the first list of their own use of the zip when the small mistake it +_+

PS: For more detailed usage of Python, refer to: http://www.cnblogs.com/BeginMan/archive/2013/03/14/2959447.html

Python Basic Learning (6th day)