from tkinter import *
from tkinter import ttk

def calculate(*args):
    try:
        value = float(income.get())
        expenses.set(value * .60)
        shortSavings.set(value * .10)
        longSavings.set(value * .10)
        guiltFree.set(value * .20)

    except ValueError:
        pass

root = Tk()
root.title("Monthly Finance Calculater")

mainframe = ttk.Frame(root, padding="3 3 12 12")
mainframe.grid(column=0, row=0, sticky=(N, W, E, S))
mainframe.columnconfigure(0, weight=1)
mainframe.rowconfigure(0, weight=1)

income = StringVar()
expenses = StringVar()
shortSavings = StringVar()
longSavings = StringVar()
guiltFree = StringVar()

income_entry = ttk.Entry(mainframe, width=7, textvariable=income)
income_entry.grid(column=2, row=1, sticky=(W, E))

expenses = ttk.Entry(mainframe, width=7, textvariable=expenses)
expenses.grid(column=2, row=1, sticky=(W, E))

ttk.Label(mainframe, textvariable=income).grid(column=2, row=2, sticky=(W, E))
ttk.Button(mainframe, text="Calculate", command=calculate).grid(column=3, row=3, sticky=W)

income_entry.focus()
root.bind('<Return>', calculate)

root.mainloop()

except ValueError:
    pass

except Exception as ex:
    print(ex)

income_entry = ttk.Entry(mainframe, width=7, textvariable=income)
income_entry.grid(column=2, row=1, sticky=(W, E))

expenses = ttk.Entry(mainframe, width=7, textvariable=expenses)
expenses.grid(column=2, row=0, sticky=(W, E))