用26大小寫字母隨機生成10個8位數密碼

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：遇到的問題 生成的大小寫字母中出現 "[" "{" 

　　 "["  的Unicode編碼是91，"{" 是123

　　choice 從字符串中隨機選取一個