python 生成隨機字符串

1、生成隨機字符串

#數字+字母+符號
def getRandChar(n):
    l = []  
    #sample = '0123456789abcdefghijklmnopqrstuvwxyz!@#$%^&*()-+=.'
    sample = random.sample(string.ascii_letters + string.digits, 62)## 從a-zA-Z0-9生成指定數量的隨機字符： list類型
    sample = sample + list('!@#$%^&*()-+=.')#原基礎上加入一些符號元素
    for i in range(n):
        char = random.choice(sample)#從sample中選擇一個字符
        l.append(char)
    return ''.join(l)#返回字符串

2、生成指定數量的隨機字符

# 從a-zA-Z0-9生成指定數量的隨機字符：
ran_str = ''.join(random.sample(string.ascii_letters + string.digits, 8))

3、生成隨機字符

# 隨機字符：
alphabet = 'abcdefghijklmnopqrstuvwxyz!@#$%^&*()'
char = random.choice(alphabet)

4、生成一個ipv4

def generateIpv4():
    a = random.randint(0,255)
    b = random.randint(0,255)
    c = random.randint(0,255)
    d = random.randint(0,255)
    
    ipv4 = '%d.%d.%d.%d'%(a,b,c,d)
    return ipv4