python之random模块

#随机模块
import random
ret=random.random()#0-1的随机的浮点数
ret1 = random.randint(1,6) # 1-6的整数,1和3能取
#print ret1
ret2 = random.randrange(1,6)# 1-6的整数,1能取,3不能取
#print ret2
ret3 = random.choice([11,22])
#print ret3
ret4 = random.sample([11,22,33,44],2) #随机两个
#print ret4

#任意范围的浮点型
ret5 = random.uniform(1,4)
#print ret5

item = [1,3,5,7,9]
ret6 = random.shuffle(item) #打乱顺序
#print ret6

#做个小demo,数字和字母双拼的验证码:
def v_code():
    retd = ""
    for i in range(5):
        num = random.randint(0,9)
        alf = chr(random.randint(65,122)) #随机取到一个字母
        s = str(random.choice([num,alf]))
        retd+=s
    return  retd
print v_code()