python random 模块

Posted 2020-10-17 minger_lcm

 

import random  # 随机数
import string

随机小数

print(random.random())
0.8681861054821751

在1-5范围 随机打印

print(random.randint(1,5))
1

和randint区别 在1-4范围 随机打印

print(random.randrange(1,5))
3

在这个范围内 随机拿出5个数出来,以list方式打印

print(random.sample(range(100),5))
[50, 92, 29, 94, 30]

print(random.sample(‘abcdef‘,5))
[‘b‘, ‘d‘, ‘f‘, ‘e‘, ‘c‘]

打印0-9数字

print(string.digits)
0123456789

打印a-z

print(string.ascii_letters)
abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ

随机拿出0-9 a-z A-Z 里面随机数 以字符串格式打印

str_source = string.ascii_letters + string.digits
print(‘‘.join(random.sample(str_source,5)))
Dzn5w

choice 随机传递序列元祖，字符串，列表 里面随机数

print(random.choice([1,3,5]))
5
print(random.choice(‘helo‘))
e

洗牌功能

l = [1,2,3,4,5,6,7,8]
print(l)
[1, 2, 3, 4, 5, 6, 7, 8]

random.shuffle(l)
print(l)
[6, 2, 5, 3, 4, 8, 1, 7]

 

随机数验证码小程序

import random
checkcode = ‘‘
for i in range(5):
    current = random.randrange(0,5)
    if current  != i:
        temp = chr(random.randint(65,90))
    elif i > 2:
        temp = chr(random.randint(97,122))
    else:
        temp = random.randint(0,9)
    checkcode += str(temp)
print(checkcode)