fibGUI.py

#!/usr/bin/python
# credit goes to antiloquax for all the fib scripts
# see youtube https://www.youtube.com/watch?v=B4_tebsj2b0&list=PLDF973C3FA8572A0C

"""I'm using python 3.2 for this tutorial. My GUI box looks and behaves different 1) there is no go! button 2) the title says <function fibonacci at 0xb7169...> its also unresponsive to entering via return key. I've checked for typos several times (this usually is my problem) But wouldn't it throw an exception? I don't see any errors. I'm writing in a ST2 editor then calling it from terminal like python3 /path/fibGUI.py any ideas? Thanks for the tut, very nice."""

#fibtk.py
# a GUI version of the Fibonacci program, using recursion

import fib2

def start_fib():
    num = input_box.get()
    txt.delete(0.0, END)
    try:
        num = int(num)
    except:
        txt.insert(0.0, "I need an integer.")
    txt.insert(0.0, str(fibonacci(num)))

def fibonacci(num):
    if num <2:
        return num
    else:
        num = fibonacci(num-1) + fibonacci(num-2)
        return num

from tkinter import *
root = Tk()
root.title(fibonacci)
root.geometry("300x100")
app = Frame(root)
app.grid()

input_lbl = Label(app, text= "Enter a number: ")
input_lbl.grid(row = 0, column = 0, pady = 5 )

input_box = Entry(app, width = 10)
input_box.grid(row = 0, column = 1, pady = 5)

bttn = Button(app, text = "go!")
bttn["command"]= start_fib
bttn.grid(row = 1, column = 0, pady = 5)

txt = Text(app, width = 15, height = 2)
txt.grid(row=1, pady = 5)

root.mainloop()