I am creating a python tkiner app and setting my entry fields I have created an only letters function on my order class and I have it to set the length to greater than $0($not blank$)$ for all entry fields $($name$,$ address, etc$)$ however, I am trying to set the state to only accept $2$ letters. I can get it to not accept lower than two but if i was to type out the state name it would still accept it$.$ How do i modify the code to only allow $2$ letters for the state entry but allow over $0$ for the other entry fields?

Code snipted

def only$\_$letters$($input$\_$text, length$)$:

$"""$ only letters function will validate input to ensure each only contains letters and is the

not blank"""

# reviewing all letter only input fields to ensure they do not include numbers and are not blank

return input$\_$text.isalpha$()$ and len$($input$\_$text$)>$ length.

def receipt $()$:

cardholder$\_$last$\_$name $=$ cardholder$\_$l$\_$name$\_$entry.get$()$

# validating entry to be letters and not blank

if not only$\_$letters$($cardholder$\_$last$\_$name, $0)$:

messagebox.showerror$("$Error$",$ "The card holder's last name can only contain letters and $"$

"cannot be blank! $")$

return

# creating an address variable

c$\_$address $=$ address.get$()$

# validating entry to be letters and numbers and not blank

if c$\_$address $==""$:

messagebox.showerror$("$Error$",$ "Cardholder address must contain a valid street address $"$

"and cannot be blank!"$)$

return

# creating city variable

city $=$ city$\_$entry.get$()$

# validating entry to be letters and not blank

if not only$\_$letters$($city$,0)$:

messagebox.showerror$("$Error$",$ "Your city can only contain letters and cannot be blank! $")$

return

# creating state variable

state $=$ state$\_$entry.get$()$

# validating entry to be letters and to be at least $2$ characters

if not only$\_$letters$($state$,2)$:

messagebox.showerror$("$Error$",$ "Your state must be the two letter abbreviation or spelled $"$

"out without spaces and it cannot be blank!"$)$

return