I have a raspberry pi with a touchscreen running raspbian, I'm hoping to have a Gui on the touchscreen that had a number keypad that when a correct input is entered a pin will output to a door latch or something. I have been over to make a Gui with a number on (by Python) it but i cant get several numbers to sit next to each other. any info will help on this thanks :) This is the code I used to try and place the buttons (you can see i just used a simple LED on/off button Gui and used it to see the placement of the buttons)

from Tkinter import *
import tkFont
import RPi.GPIO as GPIOGPIO.setmode(GPIO.BOARD)
GPIO.setup(40, GPIO.OUT)
GPIO.output(40, GPIO.LOW)win = Tk()myFont = tkFont.Font(family = 'Helvetica', size = 36, weight = 'bold')def ledON():print("LED button pressed")if GPIO.input(40) :GPIO.output(40,GPIO.LOW)ledButton["text"] = "LED OFF"else:GPIO.output(40,GPIO.HIGH)ledButton["text"] = "LED ON"def exitProgram():print("Exit Button pressed")GPIO.cleanup()win.quit()  win.title("LED GUI")exitButton  = Button(win, text = "1", font = myFont, command = ledON, height     =2 , width = 8) 
exitButton.pack(side = LEFT, anchor=NW, expand=YES)ledButton = Button(win, text = "2", font = myFont, command = ledON, height = 2, width =8 )
ledButton.pack(side = TOP, anchor=CENTER, expand=YES)ledButton = Button(win, text = "3", font = myFont, command = ledON, height = 2, width =8 )
ledButton.pack(side = RIGHT, anchor=NE, expand=YES)ledButton = Button(win, text = "4", font = myFont, command = ledON, height = 2, width =8 )
ledButton.pack(side = TOP, anchor=W, expand=YES)ledButton = Button(win, text = "5", font = myFont, command = ledON, height = 2, width =8 )
ledButton.pack(side = TOP, anchor=W, expand=YES)ledButton = Button(win, text = "6", font = myFont, command = ledON, height = 2, width =8 )
ledButton.pack(side = TOP, anchor=W, expand=YES)ledButton = Button(win, text = "7", font = myFont, command = ledON, height = 2, width =8 )
ledButton.pack(side = TOP, anchor=W, expand=YES)ledButton = Button(win, text = "8", font = myFont, command = ledON, height = 2, width =8 )
ledButton.pack(side = TOP, anchor=W, expand=YES)ledButton = Button(win, text = "9", font = myFont, command = ledON, height = 2, width =8 )
ledButton.pack(side = TOP, anchor=N, expand=YES)ledButton = Button(win, text = "0", font = myFont, command = ledON, height = 2, width =8 )
ledButton.pack(side = TOP, anchor=NW, expand=YES)mainloop()

Simple example with keypad:

I use global string variable pin to keep all pressed numbers.
(You can use list instead of string)

Key * removes last number, key # compares pin with text "3529"

import tkinter as tk# --- functions ---def code(value):# inform function to use external/global variableglobal pinif value == '*':# remove last number from `pin`pin = pin[:-1]# remove all from `entry` and put new `pin`e.delete('0', 'end')e.insert('end', pin)elif value == '#':# check pinif pin == "3529":print("PIN OK")else:print("PIN ERROR!", pin)# clear `pin`pin = ''# clear `entry`e.delete('0', 'end')else:# add number to pinpin += value# add number to `entry`e.insert('end', value)print("Current:", pin)# --- main ---keys = [['1', '2', '3'],    ['4', '5', '6'],    ['7', '8', '9'],    ['*', '9', '#'],    
]# create global variable for pin
pin = '' # empty stringroot = tk.Tk()# place to display pin
e = tk.Entry(root)
e.grid(row=0, column=0, columnspan=3, ipady=5)# create buttons using `keys`
for y, row in enumerate(keys, 1):for x, key in enumerate(row):# `lambda` inside `for` has to use `val=key:code(val)` # instead of direct `code(key)`b = tk.Button(root, text=key, command=lambda val=key:code(val))b.grid(row=y, column=x, ipadx=10, ipady=10)root.mainloop()

GitHub: furas/python-examples/tkinter/__button__/button-keypad

(EDIT: I changed link to GitHub because I moved code to subfolder)