筛选列表中的数据

列表解析

from random import randint

data = [randint(-10,10) for _ in range(10)]
data_after=[x for x in data if x > 0]

filter函数

from random import randint

data = [randint(-10,10) for _ in range(10)]
data_after=list(filter(lambda x:x > 0, data))