python条件判断数据(解析、筛选)

解决方案

列表

速度和效率方面：列表解析>filter函数>递归迭代

列表

from  random import  randint
data = [randint(-10,10) for _ in range(10)]
res = [y for y in data if y>=0]
print(res)

filter函数

from  random import  randint
data = [randint(-10,10) for _ in range(10)]
res = filter(lambda x: x>=0, data)
print(list(res))

递归迭代

res = []
for i in data:
    if i >= 0:
        res.append(i)
print(res)

字典

from  random import  randint
data_dic = {x:randint(60, 100) for x in range(1, 20)}
print('data_dic:', dict(data_dic))

res_dic = {k:v for k, v in data_dic.items() if v > 90}
print('res_dic:', res_dic)

集合

s = set(data)
res_set = {x for x in s if x%3 == 0 }
print('res_set:', res_set)