用26大小写字母随机生成10个8位数密码

print(ord('A'))
print(ord('a'))
print(ord('0'))
import random
SecChar = []
for i in range(26):
    SecChar.extend(chr(random.randint(65,90)))
for i in range(26):
    SecChar.extend(chr(random.randint(97,122)))
for i in range(9):
    SecChar.extend(chr(random.randint(48,58)))
print(SecChar)
for i in range(10):
    password = ""
    for j in range (8):
        s = random.choice(SecChar)
        password+=s
    print(password)

ps：遇到的问题 生成的大小写字母中出现 "[" "{" 

　　 "["  的Unicode编码是91，"{" 是123

　　choice 从字符串中随机选取一个