password and username code

[Ömer sarı]

hi , all , l m fresh user and l m trying to learn python by doing practice but l got stuck in that , l need help , l m a beginner and  l learn some basic things so far so, plz take in consideration that before command .

here is my code trial:
#login by using username and password

loop=1

paword=['1234','5678']
pawordch=["1","2","3","4","5","6","7","8","9","0","/","(",")","*","%","&","!","a","b","c","d","e","f","g","h","k","l","m","n","o","p","r","s","t","y","v","y","z","x"]
name=['murat','can','omer','owrasa']

while loop==1 :
    print "welcome my website,plz if you have an account , just login , otherwise , register plz"
    username=raw_input("username:")
    password=raw_input("password:")
    if username in name and password in paword:
        print "login is successful, and continue page 2"
    else :
        print" please register"
        login_username=raw_input ("username:")
        login_password=raw_input("password:")
        for login_password in pawordch:
            if login_password in pawordch :
                name.append(login_username)
                paword.append(login_password)
                print "relogin ,plz"
                print name ,"",paword
                login_username=raw_input ("username:")
                login_password=raw_input("password:")
                if login_username in name and login_password in paword:
                    print "login successful , proceed to page 2"
                    break
                    
                else:
                    print "login is unseccesful and please make sure your username and password is correct"
                    
        
.l would like to do samething when we login a website. l want program if username is not registered , register first , then store it , and l want program ask for some specific characters , like 1,2,3../,%. 

thanks for any clearification in advance