python如何生成随机n位数字与字母组合(创建随机)

ubuntu
python3.6
random

import random
n = 6
def v_code(n=6):
        """
            Returns:
                ret:random six num and letter
        """
        ret = ""
        for i in range(n):
            num = random.randint(0, 9)
            # num = chr(random.randint(48,57))#ASCII表示数字
            letter = chr(random.randint(97, 122))  # 取小写字母
            Letter = chr(random.randint(65, 90))  # 取大写字母
            s = str(random.choice([num, letter, Letter]))
            ret += s
        return ret

import random
n = 6
def v_code1(n=6):
        """
            Returns:
                ret:random six letter
        """
        ret = ""
        for i in range(n):
            letter = chr(random.randint(97, 122))  # 取小写字母
            Letter = chr(random.randint(65, 90))  # 取大写字母
            s = str(random.choice([letter, Letter]))
            ret += s
        return ret

import random
n = 6
def v_code2(n=6):
        """
            Returns:
                ret:random six num
        """
        ret = ""
        for i in range(n):
            num = random.randint(0, 9)
            s = str(random.choice([num]))
            ret += s
        return ret

# -*- coding: UTF-8 -*-
'''
@author: mengting gu
@contact: 1065504814@qq.com
@time: 2020/11/3 下午9:04
@file: random_num.py
@desc:
    Get the combination of n numbers and upper and lower case letters.
'''
import random
n = 6
def v_code_nums_letters(n=6):
        """
            Returns:
                ret:random six num and letter
        """
        ret = ""
        for i in range(n):
            num = random.randint(0, 9)
            # num = chr(random.randint(48,57))#ASCII表示数字
            letter = chr(random.randint(97, 122))  # 取小写字母
            Letter = chr(random.randint(65, 90))  # 取大写字母
            s = str(random.choice([num, letter, Letter]))
            ret += s
        return ret
def v_code_letters(n=6):
        """
            Returns:
                ret:random six letter
        """
        ret = ""
        for i in range(n):
            letter = chr(random.randint(97, 122))  # 取小写字母
            Letter = chr(random.randint(65, 90))  # 取大写字母
            s = str(random.choice([letter, Letter]))
            ret += s
        return ret
def v_code_nums(n=6):
        """
            Returns:
                ret:random six num
        """
        ret = ""
        for i in range(n):
            num = random.randint(0, 9)
            s = str(random.choice([num]))
            ret += s
        return ret
print("v_code_nums_letters result: " + v_code_nums_letters())
print("v_code_letters result: " + v_code_letters())
print("v_code_nums result: " + v_code_nums())

import random
import string
# 先介绍下random怎么生成随机数和字母
# 产生一个随机整数
num = random.randint(0,10000)
print(num)
# 产生一个随机字母，注意是一个
str1 = random.choice(string.ascii_letters)
print(str1)
# 生成10个、18位随机密码，包含数字和字母大小写
def genPass(length):
    # string.ascii_letters: 生成a-Z字母
    # string.digits：生成0-9的数字字符串
    chars = string.ascii_letters + string.digits
    # 这个的意思是：从chars中获取一个随机的字符，这个字符可能是数字也可能是大小写的字母
    # 然后for循环获取18次，再用join合并成一个字符串，所以就成了一个18位的密码
    return ''.join([random.choice(chars) for i in range(length)])
if __name__ == '__main__':
    # 批量生成10个密码
    for i in range(10):
        print(genPass(18))