#!/usr/bin/python3.4
import tkinter as tk
from tkinter import ttk
from random import randrange

def roll_loop(bonus, die, sides):
	try:
		total = int(0)
		if bonus != 0: #Check if a bonus should be added
			#The loop runs 1 less time than the number of dice
			#This is done for formating
			for totalrolls in range(0, die):
				rolled = int(randrange(1, sides)) #Calculate die roll
				result_entry.insert(tk.END, rolled) #These print the results
				result_entry.insert(tk.END, " + ")
				result_entry.insert(tk.END, bonus)
				result_entry.insert(tk.END, " + ")
				rollplusbonusloop = int(rolled + bonus) #Add the bonus
				total += rollplusbonusloop #Generate a cumulative total
			else:
				#Run the calculation loop one more time
				#This gets to the appropriate number of dice
				#While keeping formating
				rolled = int(randrange(1, sides))
				result_entry.insert(tk.END, rolled)
				result_entry.insert(tk.END, " + ")
				result_entry.insert(tk.END, bonus)
				result_entry.insert(tk.END, " = ")
				rollplusbonusloop = int(rolled + bonus)
				total += rollplusbonusloop
				return total #Return the final total of all rolls
		else:
			#Run this loop if no bonus is to be added
			#Otherwise done the same as above loop
			#Separated for formating
			for totalrolls2 in range(0, die):
				rolled = int(randrange(1, sides))
				result_entry.insert(tk.END, rolled)
				result_entry.insert(tk.END, " + ")
				total += rolled
			else:
				rolled = int(randrange(1, sides))
				result_entry.insert(tk.END, rolled)
				result_entry.insert(tk.END, " = ")
				total += rolled
				return total
	except ValueError:
		pass

def give_total(*args):
	try:
		#Pull numbers for calculations
		addbonus = int(bonus.get())
		numberofdice = int(die.get())
		numberofdice -= 1 #Subtracted for formating in the loops
		numberofsides = int(sides.get())
		numberofsides += 1 #Added to give full range of possibilities
		#Calculate total by calling the appropriate loop
		total = int(roll_loop(addbonus, numberofdice, numberofsides))
		#Print total, equal sign printed at end of loops prior to this
		result_entry.insert(tk.END, total)
		result_entry.insert(tk.END, "\n") #Add line break at end of rolls
	except ValueError:
		pass

#Create root
root = tk.Tk()
root.title("Die Roller")

#List of variables
sides = tk.StringVar()
result = tk.StringVar()
die = tk.StringVar()
bonus = tk.StringVar()

#Create main window in root
mainframe = ttk.Frame(root, padding="10")
mainframe.grid(column=0, row=0, sticky=(tk.N, tk.W, tk.E, tk.S))

#Create labels
ttk.Label(mainframe, text="Sides").grid(column=4, row=1, sticky=tk.NW)
ttk.Label(mainframe, text="Results").grid(columnspan=6, row=3, sticky=tk.NE)
ttk.Label(mainframe, text="Dice").grid(column=1, row=1, sticky=tk.NW)
ttk.Label(mainframe, text="Bonus").grid(column=6, row=1, stick=tk.NW)
#These labels are for showing order of operations to user
ttk.Label(mainframe, text="X").grid(column=2, row=2, sticky=tk.NW)
ttk.Label(mainframe, text="+").grid(column=5, row=2, sticky=tk.NW)
ttk.Label(mainframe, text="(").grid(column=3, row=2, sticky=tk.NW)
ttk.Label(mainframe, text=")").grid(column=7, row=2, sticky=tk.NW)

#Create buttons
ttk.Button(mainframe, text="Roll", command=give_total).grid(column=8, row=2, sticky=tk.NW)


#Create entry boxes
side_entry = ttk.Entry(mainframe, width=3, textvariable=sides)
side_entry.grid(column=4, row=2, sticky=tk.NW)
die_entry = ttk.Entry(mainframe, width=3, textvariable=die)
die_entry.grid(column=1, row=2, sticky=tk.NW)
die_entry.insert(0, "1")
bonus_entry = ttk.Entry(mainframe, width=3, textvariable=bonus)
bonus_entry.grid(column=6, row=2, sticky=tk.NW)
bonus_entry.insert(0, "0")

#Create a frame to house the result field and scrollbars
result_frame = tk.Frame(mainframe, width=53, height=13)
result_frame.grid(columnspan=9, row=5)

#Create scrollbars for results field
resultyscroll = tk.Scrollbar(result_frame)
resultyscroll.grid(column=2, row=1, sticky=tk.W+tk.N+tk.S)
resultxscroll = tk.Scrollbar(result_frame, orient=tk.HORIZONTAL)
resultxscroll.grid(column=1, row=2, sticky=tk.N+tk.W+tk.E)

#Create text field for listing results
result_entry = tk.Text(result_frame, width=50, height=10, wrap="none")
result_entry.grid(column=1, row=1)
result_entry.config(xscrollcommand=resultxscroll.set, yscrollcommand=resultyscroll.set)

#Connect scrollbars with text field now that both are created
resultyscroll.config(command=result_entry.yview)
resultxscroll.config(command=result_entry.xview)

for child in mainframe.winfo_children(): child.grid_configure(padx=5, pady=5)

#Give focus to side_entry on open
side_entry.focus()
#Bind the return/enter key to give the "give_total" command
root.bind('<Return>', give_total)

root.mainloop()

def foo(aString, anInt):
    """
    Print aString anInt times
    """

    […]