day-4 map&filter

 1 stus = ['zhansan','lisi','wangwu','xiaohei']
 2 def add_pre(name):
 3     return 'cnz_%s' % name
 4 
 5 result = list(map(add_pre,stus))
 6 print(result)
 7 # map作用
 8 # map循环调用函数
 9 # map每次循环的返回值保存，最后返回
10 
11 
12 # filter作用
13 # filter循环调用函数
14 # filter过滤传入的参数，如果为true，就保存，为false，就丢弃
15 stu_score = [60,30,90,25,100,85]
16 result1 = list(filter(lambda score:score>=60,stu_score))
17 print(result1)