'''
    python 高级笔记 根据条件筛选数据
    来源:https://www.bilibili.com/video/BV1b5411s76z?p=3
'''

from random import randint
import timeit

# 1、根据条件筛选数据
# 1-1、列表 过滤掉负数
list01 = [randint(-10,10) for _ in range(10)]
print(list01)
# 迭代
res = []
for i in list01:
    if i >= 0:
        res.append(i)
print(res)

# 推导式
res = [i for i in list01 if i > 0]
print(res)

# filter
res = filter(lambda x: x >= 0, list01)
print(list(res))

# 1-2、字典 筛选掉不及格
dict01 = {x:randint(1,100) for x in range(1,10)}
print(dict01)
res = {k: v for (k, v) in dict01.items() if v >= 60}
print(res)

set01 = set(list01)
print(set01)
res = {x for x in set01 if x >= 0}
print(res)