python推导式详解

1、列表推导式 >>> number_list = [i for i in range(3)] >>> number_list [0, 1, 2] >>> number_list = [num - 1 for num in range(3)] >>> number_list [-1, 0, 1] >>> #创建偶数列表 ... list_a = [ i for i in range(6) if i %2 == 1] >>> list_a [1, 3, 5] >>> #嵌套循环 ... rows = range(4) >>> cols = range(3) >>> cells = [(row,