7 digit randomly generated password

# 1, the random characters randomly from all seven 
# 2, respectively, and then all the uppercase and lowercase letters, numbers, special characters on the intersection 


# 1, second idea 
# from uppercase upper_Case = 'AZ' lower_Case = ' az' = digits' 0-9 'pUC = '23 $ @ $ @ $' 

Import Random
 Import String 
NUM = the iNPUT ( ' Please enter the password to generate how many: ' ) .strip () 
passwords = []
 IF num.isdigit () : 
    NUM = int (NUM)
     the while len (Passwords) =! NUM: 
        P1 = random.sample (string.ascii_letters string.digits + + string.punctuation,. 7) # randomly 7 
        Print (P1)
         IF set(p1) & set(string.ascii_lowercase) and set(p1) & set(string.ascii_uppercase) \
            and set(p1) & set(string.digits)  and set(p1) & set(string.punctuation):
            password = ''.join(p1)#把密码变成字符串
            if password not in passwords:
                passwords.append(password)
else:
    print('请输入数字')

f = open('passwrods.txt','w')
for p in passwords:
    f.write(p+'\n')
f.close()