Python 列表、字典、集合根据条件筛选数据

# 列表根据条件筛选数据

from random import randint

L = [randint(-10,10) for _ in range(10)]

print(L)

res = [x for x in L if x >= 0]

print(res)

# 使用filter函数筛选

G = filter(lambda x : x >= 0, L)

print(list(G))

 

#  字典根据条件筛选数据

from random import randint

D = {'student%d' % i : randint(50, 100) for i in range(1, 21)}

print(D)

res = {k : v for k ,v in D.items() if v >= 90}

print(res)

# 使用filter函数筛选

G = filter(lambda item : item[1] >= 90 , D.items())

print(dict(G))

 

#  集合根据条件筛选数据

from random import randint

s = {randint(0, 20) for _ in range(20)}

print(s)

res = {x for x in s if x % 3 == 0}

print(res)