python - Simple password check TypeError: 'NoneType' object has no attribute '__getitem__' -

i'm getting error , highlighted code passw[0]

what error mean exactly? it's simple comparison since returned tuple can't compare it. need change password tuple? or have other way around come out equal? here's full code. it's simple password check.

def check_login(db, useremail, password):     """returns true if password matches stored"""      cur = db.cursor()     password1 = db.crypt(password)     ur = "select email users email = ?"     cur.execute(ur, (useremail,))     user = cur.fetchone()     if user[0] == useremail:         pas = "select password users email = ? , password = ?"         cur.execute(pas, (useremail, password1,))         passw = cur.fetchone()         if passw[0] == password1:             return true         else:             return false 

passw = cur.fetchone() 

cur.fetchone() returns none when there in no match. since you're taking password user, , looking , email, if passwords don't match, won't find row. result, cur.fetchone() returns none. in fact, this:

passw = cur.fetchone() if passw[0] == password1:     return true else:     return false 

can turn into:

return if cur.fetchone() not none:     return true return false 

or jen-ya suggested:

return cur.fetchone() not none