第四章课后习题 4.19-4.21

4.19 随机挑选0-100的奇数

import random
num = random.randint(0,100)
while num % 2 == 0:
    num = random.randint(0,100)
print(num)

 

4.20 从fruit列表中随机挑选字符串

import random
fruit = ['apple', 'pear', 'peach', 'orange']
f = random.choice(fruit)
print(f)

 

4.21 从字符串中随机挑选4个字符

import random 
pop = 'abcdefghij'
s = random.sample(pop,4)
print(s)