python基础---列表表达式

基本语法：[expr for iter_var in iterable]

xx = [1, 2, 3, 4, 5, 6, 7, 8]yy = [xx[i] for i in range(0, len(xx), 2)]# 结合if语句，可加入条件zz = [xx[i] for i in range(0, len(xx), 2) if xx[i]>4]qq = [(x+1, y+1) for x in range(3) for y in range(5)]# 支持for循环的嵌套，如读取文件f = open('1.txt', 'r')words = [word for line in f for word in line.split()]