Python-递推式构造链表(List comprehension)
格式
alist = [expresion for item in list (if condition)]
其中if condition可以省略
示例
even = [x for x in range(0, 11) if x%2==0] #10以内的偶数
six = [(x,y) for x in range(20) for y in range(20) if x*y%6==0 and x<y] #可以这样嵌套
递推构造字典
格式和递推构造链表相似
s = "world"
dic = {c:c.upper() for c in s}
