如何在列表，字典、集合中筛选数据——进阶学习

[1,22,-4,3,-9,8]

a = [1,22,-4,3,-9,8]

b = []
for i in a:
    if(i>0):
        b.append(i)

print(b)

from random import randint

#第一步生成随机数列
data =[randint(-10,10) for _ in range(10)]#在-10到10之间随机生成数列
print(data)

#第二步，用列表解析的方式

b = [x for x in data if x>0]
print(b)

from random import randint
a = {x:randint(0,100) for x in range(1,26)}
print(a)

from random import randint
a = {x:randint(0,100) for x in range(1,11)}
print(a)

b = {k:x for k,x in a.items() if x>60}#同时迭代键和值，然后进行判断
print(b)

from random import randint
a = [randint(-10,10) for i in range(1,11)]
print(a)

b = set(a) #把列表a变成集合
print(b)

from random import randint
a = [randint(-10,10) for i in range(1,11)]


b = set(a) #把列表a变成集合
print(b)
c = {i for i in b if i%3 == 0}
print(c)