random 模块

random.random() 用于生成一个0-1的随机浮点数：0<=n<1.0

import random
a = random.random()
b = random.random()
print(a,b)  
0.15878192693959026 0.46519743062729757

random.uniform(a,b) 用于生成一个指定范围内的随机浮点数

import random
a = random.uniform(5,10)
b = random.uniform(10,5)
print(a,b)
#6.9049288850125485 9.36059520278101

random.randint(a,b) 用于生成一个指定范围内的整数

import random
a = random.randint(2,4)
b = random.randint(1,5)
print(a,b)
#2 3

random.choice(sequence) 从序列中获取一个随机元素

import random
list_1 = ['python','java','c']
str_1 = "i love python"
tuple_1 = (1,2,'kai')
print(random.choice(list_1))  #java
print(random.choice(str_1))   #v
print(random.choice(tuple_1)) #2

random.shuffle(list) 用于将一个列表中的元素打乱，即将列表中的元素随机排列

import random
list_1 = ['python','java','c','c++']
random.shuffle(list_1)
print(list_1)
# ['c', 'python', 'java', 'c++']

random.sample(sequence,k) 从指定序列中随机获取指定长度的片段。sample函数不会修改原有的序列。

import random
list_1 = ['one','two','three','four']
slice = random.sample(list_1,2)
print(list_1)  # ['one', 'two', 'three', 'four']
print(slice)   # ['two', 'three']