python3----输出所有大小写字母及数字

print([chr(i) for i in range(65, 91)]) # 所有大写字母
print([chr(i) for i in range(97, 123)]) # 所有小写字母
print([chr(i) for i in range(48, 58)]) # 所有数字 ####################
['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z']
['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z']
['', '', '', '', '', '', '', '', '', '']

import string # 导入string这个模块
print(string.digits) # 输出包含数字0~9的字符串
print(string.ascii_letters) # 包含所有字母(大写或小写)的字符串
print(string.ascii_lowercase) # 包含所有小写字母的字符串
print(string.ascii_uppercase) # 包含所有大写字母的字符串 ##############
0123456789
abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
abcdefghijklmnopqrstuvwxyz
ABCDEFGHIJKLMNOPQRSTUVWXYZ

a = [str(x) for x in range(10)] ######################
['', '', '', '', '', '', '', '', '', '']

import random
def get_code():
source = list('')
for i in range(97, 123):
source.append(chr(i))
print(''.join(random.sample(source, 4)))

def v_code():
code = ''
for i in range(5):
add = random.choice([random.randrange(10), chr(random.randrange(97, 123))])
code += str(add)
print(code)