import random
import string
import time

user_input = input("1.ascii_lowercase\\n2.ascii_uppercase\\n3.digits\\n4.punctuation\\n\\nPlease choose (e.g., 123 for letters and digits): ")


type_choose = \[int(char) for char in user_input if char in '1234'\]
try:
if not type_choose:
raise ValueError('Invalid choice')
except ValueError as e:
print(f'Value Error \| {e}')
time.sleep(3)
exit()


#字符池
char_pool = \[\]
if 1 in type_choose:
char_pool += string.ascii_lowercase
if 2 in type_choose:
char_pool += string.ascii_uppercase
if 3 in type_choose:
char_pool += string.digits
if 4 in type_choose:
char_pool += string.punctuation


#长度
try:
length = int(input('Char Length: '))
if length \< 1:
raise ValueError('Length must be greater than 0')
except ValueError as e:
print(f'Value Error \| {e}')
time.sleep(3)
exit()


#生成字符个数
try:
number = int(input('Number of chars to generate: '))
if number \< 1:
raise ValueError('Number must be greater than 0')
except ValueError as e:
print(f'Value Error \| {e}')
time.sleep(3)
exit()


i = 0

`try:
while i < number:
char = "".join(random.choices(char_pool, k = length))
print(char)
f = open('chars.txt', 'a')
f.write(char + '\n')
i += 1
f.close()
print('chars.txt generated.\nExit in 30 seconds. Crl+C to exit now.')
time.sleep(30)
except ValueError:
print(f'Value Error | Unkown')
time.sleep(3)
exit()
`