Python list comprehensions (list-generated)

List generation: Creating a list

Normal Create List format:

1. Defining a list variable

2.for.. In.. ：

Statement

List-generated lists format:

[Statement for ...]

As you can see, the list generation is just a matter of referring the for statement to the for peer.

First, the normal creation list

#!/usr/bin/python

#common Establish
Lis1 = [];
For x in range (1, 10):
Lis1.append (x);
Print "Lis1:", lis1;

Ii. List-Generated

#List comprehensions
LIS2 = [x for x in range (1, 10)]
Print "Lis2:", Lis2;

#also can choose the even number in list
LIS3 = [x * x for x in range (1, ten) if x%2 = = 0]
Print "Lis3:", Lis3;

#two for in list
LIS4 = [x + y for x in ' ABC ' for y in ' XYZ ']
Print "LIS4:", LIS4;

#show the file in directory
Import OS; #导入OS模块
LIS5 = [D for D in Os.listdir ('. ')]
Print lis5;

#convert all Big_write string to Small_write
L = [' ABC ', ' EFG ', ' Hij ', ' 8 '] #只能为char类型, other types prompt error
LIS6 = [S.lower () for S in L] #lower () is a built-in function that converts uppercase to lowercase
Print LIS6;

Python list comprehensions (list-generated)