Re: Help with Tkinter Label Widget

[Guilherme Polo]

On Wed, Sep 3, 2008 at 8:57 PM, Kevin McKinley <ke*****@yahoo. comwrote:

Below i've put the code for a program that i wrote. I need help on lines 384-403. If you run this program you will notice on the first tab when have it produce an answer the $ is surrounded with {$}. How can i get rid of that?

Come on.. "help on lines 384-403", that is not a good way to look for
help. You are supposed to post some minimal code that demonstrates the
problem.

Anyway, this demonstrates what you are getting (independent of python version):

import Tkinter

label = Tkinter.Label()
label['text'] = '$', 2.0
label.pack()
label.mainloop( )

The problem is that you are relying on something that is not supposed
to be done. Note how you are passing a tuple to the "text" option,
while you are actually supposed to pass a single value. You should be
passing something like this instead:

label['text'] = '$%f' % 2.0

>
from Tkinter import *

class MyApp:
def __init__(self, parent):
self.myparent = parent

self.frame1 = Frame(parent)
self.frame1.gri d(row=0, column=0)

self.frame2 = Frame(parent)
self.frame2.gri d(row=0, column=0)

self.frame3 = Frame(parent)
self.frame3.gri d(row=0, column=0)

self.frame4 = Frame(parent)
self.frame4.gri d(row=0, column=0)

self.a = self.b = self.c = self.d = 0

self.COG1 = DoubleVar(); self.COG2 = DoubleVar(); self.COG3 = DoubleVar(); self.COG4 = DoubleVar()
self.GP1 = DoubleVar(); self.PrInc = DoubleVar(); self.markupPric e = DoubleVar()

self.tab1Func(1 )

def tab1Func(self, event):
self.tab1 = Button(self.fra me1, width=14, relief=FLAT, bg="white", text="Multi-Markup")
self.tab1.bind( "<Button-1>", self.switch1)
self.tab1.grid( row=0, column=0)

self.tab2 = Button(self.fra me1, width=14, relief=SUNKEN, bg="dark grey", text="Single Markup")
self.tab2.bind( "<Button-1>", self.switch2)
self.tab2.grid( row=0, column=1)

self.tab3 = Button(self.fra me1, width=14, relief=SUNKEN, bg="dark grey", text="Product Increase")
self.tab3.bind( "<Button-1>", self.switch3)
self.tab3.grid( row=0, column=2)

self.tab4 = Button(self.fra me1, width=14, relief=SUNKEN, bg="dark grey", text="Calculate GP")
self.tab4.bind( "<Button-1>", self.switch4)
self.tab4.grid( row=0, column=3)

self.tab1Title = Label(self.fram e1, font="bold", relief=GROOVE, text="Multi-Markup Calculator")
self.tab1Title. grid(pady=1, row=1, column=0, columnspan=4, sticky=W+E)

self.tab1Entry1 = Entry(self.fram e1, textvariable=se lf.COG1)
self.tab1Entry1 .select_range(0 , END)
self.tab1Entry1 .bind("<Return> ", self.multiMarku p)
self.tab1Entry1 .focus_force()
self.tab1Entry1 .grid(padx=2, pady=2, row=2, column=2, columnspan=2, sticky=W)

self.tab1Entry1 Title= Label(self.fram e1, text="Enter COG:")
self.tab1Entry1 Title.grid(padx =2, pady=2, row=2, column=1, sticky=E)

self.tab1CalcBu tton = Button(self.fra me1, text="Calculate ")
self.tab1CalcBu tton.bind("<But ton-1>", self.multiMarku p)
self.tab1CalcBu tton.bind("<Ret urn>", self.multiMarku p)
self.tab1CalcBu tton.grid(padx= 2, pady=2, row=3, column=1, columnspan=2, sticky=W+E)

self.tab1Header = Label(self.fram e1, font="bold", relief=GROOVE, text="Gross Profit % Markup Price")
self.tab1Header .grid(padx=2, pady=2, row=4, column=0, columnspan=4, sticky=W+E)

self.tab1GP1 = Label(self.fram e1, width=4,relief= RIDGE, bg="white", text="5%")
self.tab1GP1.gr id(padx=2, pady=2, row=5, column=1)

self.tab1GP2 = Label(self.fram e1, width=4, relief=RIDGE, bg="light grey", text="10%")
self.tab1GP2.gr id(padx=2, pady=2, row=6, column=1)

self.tab1GP3 = Label(self.fram e1, width=4, relief=RIDGE, bg="white", text="15%")
self.tab1GP3.gr id(padx=2, pady=2, row=7, column=1)

self.tab1GP4 = Label(self.fram e1, width=4, relief=RIDGE, bg="light grey", text="18%")
self.tab1GP4.gr id(padx=2, pady=2, row=8, column=1)

self.tab1GP5 = Label(self.fram e1, width=4, relief=RIDGE, bg="white", text="20%")
self.tab1GP5.gr id(padx=2, pady=2, row=9, column=1)

self.tab1GP6 = Label(self.fram e1, width=4, relief=RIDGE, bg="light grey", text="21%")
self.tab1GP6.gr id(padx=2, pady=2, row=10, column=1)

self.tab1GP7 = Label(self.fram e1, width=4, relief=RIDGE, bg="white", text="22%")
self.tab1GP7.gr id(padx=2, pady=2, row=11, column=1)

self.tab1GP8 = Label(self.fram e1, width=4, relief=RIDGE, bg="light grey", text="23%")
self.tab1GP8.gr id(padx=2, pady=2, row=12, column=1)

self.tab1GP9 = Label(self.fram e1, width=4, relief=RIDGE, bg="white", text="24%")
self.tab1GP9.gr id(padx=2, pady=2, row=13, column=1)

self.tab1GP10 = Label(self.fram e1, width=4, relief=RIDGE, bg="light grey", text="25%")
self.tab1GP10.g rid(padx=2, pady=2, row=14, column=1)

self.tab1GP11 = Label(self.fram e1, width=4, relief=RIDGE, bg="white", text="26%")
self.tab1GP11.g rid(padx=2, pady=2, row=15, column=1)

self.tab1GP12 = Label(self.fram e1, width=4, relief=RIDGE, bg="light grey", text="27%")
self.tab1GP12.g rid(padx=2, pady=2, row=16, column=1)

self.tab1GP13 = Label(self.fram e1, width=4, relief=RIDGE, bg="white", text="28%")
self.tab1GP13.g rid(padx=2, pady=2, row=17, column=1)

self.tab1GP14 = Label(self.fram e1, width=4, relief=RIDGE, bg="light grey", text="29%")
self.tab1GP14.g rid(padx=2, pady=2, row=18, column=1)

self.tab1GP15 = Label(self.fram e1, width=4, relief=RIDGE, bg="white", text="30%")
self.tab1GP15.g rid(padx=2, pady=2, row=19, column=1)

self.tab1GP16 = Label(self.fram e1, width=4, relief=RIDGE, bg="light grey", text="31%")
self.tab1GP16.g rid(padx=2, pady=2, row=20, column=1)

self.tab1GP17 = Label(self.fram e1, width=4, relief=RIDGE, bg="white", text="33%")
self.tab1GP17.g rid(padx=2, pady=2, row=21, column=1)

self.tab1GP18 = Label(self.fram e1, width=4, relief=RIDGE, bg="light grey", text="35%")
self.tab1GP18.g rid(padx=2, pady=2, row=22, column=1)

self.tab1GP19 = Label(self.fram e1, width=4, relief=RIDGE, bg="white", text="40%")
self.tab1GP19.g rid(padx=2, pady=2, row=23, column=1)

self.tab1GP20 = Label(self.fram e1, width=4, relief=RIDGE, bg="light grey", text="45%")
self.tab1GP20.g rid(padx=2, pady=2, row=24, column=1)

self.tab1Markup 1 = Label(self.fram e1, width=12, relief=RIDGE, bg="white")
self.tab1Markup 1.grid(padx=2, pady=2, row=5, column=2, sticky=E)

self.tab1Markup 2 = Label(self.fram e1, width=12, relief=RIDGE, bg="light grey")
self.tab1Markup 2.grid(padx=2, pady=2, row=6, column=2, sticky=E)

self.tab1Markup 3 = Label(self.fram e1, width=12, relief=RIDGE, bg="white")
self.tab1Markup 3.grid(padx=2, pady=2, row=7, column=2, sticky=E)

self.tab1Markup 4 = Label(self.fram e1, width=12, relief=RIDGE, bg="light grey")
self.tab1Markup 4.grid(padx=2, pady=2, row=8, column=2, sticky=E)

self.tab1Markup 5 = Label(self.fram e1, width=12, relief=RIDGE, bg="white")
self.tab1Markup 5.grid(padx=2, pady=2, row=9, column=2, sticky=E)

self.tab1Markup 6 = Label(self.fram e1, width=12, relief=RIDGE, bg="light grey")
self.tab1Markup 6.grid(padx=2, pady=2, row=10, column=2, sticky=E)

self.tab1Markup 7 = Label(self.fram e1, width=12, relief=RIDGE, bg="white")
self.tab1Markup 7.grid(padx=2, pady=2, row=11, column=2, sticky=E)

self.tab1Markup 8 = Label(self.fram e1, width=12, relief=RIDGE, bg="light grey")
self.tab1Markup 8.grid(padx=2, pady=2, row=12, column=2, sticky=E)

self.tab1Markup 9 = Label(self.fram e1, width=12, relief=RIDGE, bg="white")
self.tab1Markup 9.grid(padx=2, pady=2, row=13, column=2, sticky=E)

self.tab1Markup 10 = Label(self.fram e1, width=12, relief=RIDGE, bg="light grey")
self.tab1Markup 10.grid(padx=2, pady=2, row=14, column=2, sticky=E)

self.tab1Markup 11 = Label(self.fram e1, width=12, relief=RIDGE, bg="white")
self.tab1Markup 11.grid(padx=2, pady=2, row=15, column=2, sticky=E)

self.tab1Markup 12 = Label(self.fram e1, width=12, relief=RIDGE, bg="light grey")
self.tab1Markup 12.grid(padx=2, pady=2, row=16, column=2, sticky=E)

self.tab1Markup 13 = Label(self.fram e1, width=12, relief=RIDGE, bg="white")
self.tab1Markup 13.grid(padx=2, pady=2, row=17, column=2, sticky=E)

self.tab1Markup 14 = Label(self.fram e1, width=12, relief=RIDGE, bg="light grey")
self.tab1Markup 14.grid(padx=2, pady=2, row=18, column=2, sticky=E)

self.tab1Markup 15 = Label(self.fram e1, width=12, relief=RIDGE, bg="white")
self.tab1Markup 15.grid(padx=2, pady=2, row=19, column=2, sticky=E)

self.tab1Markup 16 = Label(self.fram e1, width=12, relief=RIDGE, bg="light grey")
self.tab1Markup 16.grid(padx=2, pady=2, row=20, column=2, sticky=E)

self.tab1Markup 17 = Label(self.fram e1, width=12, relief=RIDGE, bg="white")
self.tab1Markup 17.grid(padx=2, pady=2, row=21, column=2, sticky=E)

self.tab1Markup 18 = Label(self.fram e1, width=12, relief=RIDGE, bg="light grey")
self.tab1Markup 18.grid(padx=2, pady=2, row=22, column=2, sticky=E)

self.tab1Markup 19 = Label(self.fram e1, width=12, relief=RIDGE, bg="white")
self.tab1Markup 19.grid(padx=2, pady=2, row=23, column=2, sticky=E)

self.tab1Markup 20 = Label(self.fram e1, width=12, relief=RIDGE, bg="light grey")
self.tab1Markup 20.grid(padx=2, pady=2, row=24, column=2, sticky=E)

def tab2Func(self, event):
self.tab1 = Button(self.fra me2, width=14, relief=SUNKEN, bg="dark grey", text="Multi-Markup")
self.tab1.bind( "<Button-1>", self.switch1)
self.tab1.grid( row=0, column=0)

self.tab2 = Button(self.fra me2, width=14, relief=FLAT, bg="white", text="Single Markup")
self.tab2.bind( "<Button-1>", self.switch2)
self.tab2.grid( row=0, column=1)

self.tab3 = Button(self.fra me2, width=14, relief=SUNKEN, bg="dark grey", text="Product Increase")
self.tab3.bind( "<Button-1>", self.switch3)
self.tab3.grid( row=0, column=2)

self.tab4 = Button(self.fra me2, width=14, relief=SUNKEN, bg="dark grey", text="Calculate GP")
self.tab4.bind( "<Button-1>", self.switch4)
self.tab4.grid( row=0, column=3)

self.tab2Title = Label(self.fram e2, font="bold", relief=GROOVE, text="Single Markup Calculator")
self.tab2Title. grid(pady=1, row=1, column=0, columnspan=4, sticky=W+E)

self.tab2Entry1 = Entry(self.fram e2, textvariable=se lf.COG2)
self.tab2Entry1 .select_range(0 , END)
self.tab2Entry1 .bind("<Return> ", self.singleMark up)
self.tab2Entry1 .focus_force()
self.tab2Entry1 .grid(padx=2, pady=2, row=2, column=2, columnspan=2, sticky=W)

self.tab2Entry2 = Entry(self.fram e2, textvariable=se lf.GP1)
self.tab2Entry2 .select_range(0 , END)
self.tab2Entry2 .bind("<Return> ", self.singleMark up)
self.tab2Entry2 .focus_force()
self.tab2Entry2 .grid(padx=2, pady=2, row=3, column=2, columnspan=2, sticky=W)

self.tab2Entry1 Title= Label(self.fram e2, text="Enter COG:")
self.tab2Entry1 Title.grid(padx =2, pady=2, row=2, column=1, sticky=E)

self.tab2Entry2 Title= Label(self.fram e2, text="Enter GP %:")
self.tab2Entry2 Title.grid(padx =2, pady=2, row=3, column=1, sticky=E)

self.tab2CalcBu tton = Button(self.fra me2, text="Calculate ")
self.tab2CalcBu tton.bind("<But ton-1>", self.singleMark up)
self.tab2CalcBu tton.bind("<Ret urn>", self.singleMark up)
self.tab2CalcBu tton.grid(padx= 2, pady=2, row=4, column=1, columnspan=2, sticky=W+E)

self.tab2Header = Label(self.fram e2, font="bold", relief=GROOVE)
self.tab2Header["text"] = self.GP1.get(), "%","Markup "
self.tab2Header .grid(padx=2, pady=2, row=5, column=0, columnspan=4, sticky=W+E)

self.tab2Markup 1 = Label(self.fram e2, width=10, font="bold", relief=GROOVE, bg="white")
self.tab2Markup 1.grid(padx=2, pady=2, row=6, column=1, columnspan=2)

def tab3Func(self, event):
self.tab1 = Button(self.fra me3, width=14, relief=SUNKEN, bg="dark grey", text="Multi-Markup")
self.tab1.bind( "<Button-1>", self.switch1)
self.tab1.grid( row=0, column=0)

self.tab2 = Button(self.fra me3, width=14, relief=SUNKEN, bg="dark grey", text="Single Markup")
self.tab2.bind( "<Button-1>", self.switch2)
self.tab2.grid( row=0, column=1)

self.tab3 = Button(self.fra me3, width=14, relief=FLAT, bg="white", text="Product Increase")
self.tab3.bind( "<Button-1>", self.switch3)
self.tab3.grid( row=0, column=2)

self.tab4 = Button(self.fra me3, width=14, relief=SUNKEN, bg="dark grey", text="Calculate GP")
self.tab4.bind( "<Button-1>", self.switch4)
self.tab4.grid( row=0, column=3)

self.tabTitle = Label(self.fram e3, font="bold",rel ief=GROOVE, text="Product Increase Calculator")
self.tabTitle.g rid(pady=1, row=1, column=0, columnspan=4, sticky=W+E)

self.tab3Entry1 = Entry(self.fram e3, textvariable=se lf.COG3)
self.tab3Entry1 .select_range(0 , END)
self.tab3Entry1 .bind("<Return> ", self.priceIncre ase)
self.tab3Entry1 .focus_force()
self.tab3Entry1 .grid(padx=2, pady=2, row=2, column=2, columnspan=2, sticky=W)

self.tab3Entry2 = Entry(self.fram e3, textvariable=se lf.PrInc)
self.tab3Entry2 .select_range(0 , END)
self.tab3Entry2 .bind("<Return> ", self.priceIncre ase)
self.tab3Entry2 .focus_force()
self.tab3Entry2 .grid(padx=2, pady=2, row=3, column=2, columnspan=2, sticky=W)

self.tab3Entry1 Title= Label(self.fram e3, text="Enter COG:")
self.tab3Entry1 Title.grid(padx =2, pady=2, row=2, column=1, sticky=E)

self.tab3Entry2 Title= Label(self.fram e3, text="Enter Increase %:")
self.tab3Entry2 Title.grid(padx =2, pady=2, row=3, column=1, sticky=E)

self.tab3CalcBu tton = Button(self.fra me3, text="Calculate ")
self.tab3CalcBu tton.bind("<But ton-1>", self.priceIncre ase)
self.tab3CalcBu tton.bind("<Ret urn>", self.priceIncre ase)
self.tab3CalcBu tton.grid(padx= 2, pady=2, row=4, column=1, columnspan=2, sticky=W+E)

self.tab3Header = Label(self.fram e3, font="bold", relief=GROOVE)
self.tab3Header["text"] = self.PrInc.get( ), "%","Price","In crease"
self.tab3Header .grid(padx=2, pady=2, row=5, column=0, columnspan=4, sticky=W+E)

self.tab3Markup 1 = Label(self.fram e3, width=10, font="bold", relief=GROOVE, bg="white")
self.tab3Markup 1.grid(padx=2, pady=2, row=6, column=1, columnspan=2)

def tab4Func(self, event):
self.tab1 = Button(self.fra me4, width=14, relief=SUNKEN, bg="dark grey", text="Multi-Markup")
self.tab1.bind( "<Button-1>", self.switch1)
self.tab1.grid( row=0, column=0)

self.tab2 = Button(self.fra me4, width=14, relief=SUNKEN, bg="dark grey", text="Single Markup")
self.tab2.bind( "<Button-1>", self.switch2)
self.tab2.grid( row=0, column=1)

self.tab3 = Button(self.fra me4, width=14, relief=SUNKEN, bg="dark grey", text="Product Increase")
self.tab3.bind( "<Button-1>", self.switch3)
self.tab3.grid( row=0, column=2)

self.tab4 = Button(self.fra me4, width=14, relief=FLAT, bg="white", text="Calculate GP")
self.tab4.bind( "<Button-1>", self.switch4)
self.tab4.grid( row=0, column=3)

self.tabTitle = Label(self.fram e4, font="bold",rel ief=GROOVE, text="Calculate GP")
self.tabTitle.g rid(pady=1, row=1, column=0, columnspan=4, sticky=W+E)

self.tab4Entry1 = Entry(self.fram e4, textvariable=se lf.COG4)
self.tab4Entry1 .select_range(0 , END)
self.tab4Entry1 .bind("<Return> ", self.GpCalc)
self.tab4Entry1 .focus_force()
self.tab4Entry1 .grid(padx=2, pady=2, row=2, column=2, columnspan=2, sticky=W)

self.tab4Entry2 = Entry(self.fram e4, textvariable=se lf.markupPrice)
self.tab4Entry2 .select_range(0 , END)
self.tab4Entry2 .bind("<Return> ", self.GpCalc)
self.tab4Entry2 .focus_force()
self.tab4Entry2 .grid(padx=2, pady=2, row=3, column=2, columnspan=2, sticky=W)

self.tab4Entry1 Title= Label(self.fram e4, text="Enter COG:")
self.tab4Entry1 Title.grid(padx =2, pady=2, row=2, column=1, sticky=E)

self.tab4Entry2 Title= Label(self.fram e4, text="Enter Markup $:")
self.tab4Entry2 Title.grid(padx =2, pady=2, row=3, column=1, sticky=E)

self.tab4CalcBu tton = Button(self.fra me4, text="Calculate ")
self.tab4CalcBu tton.bind("<But ton-1>", self.GpCalc)
self.tab4CalcBu tton.bind("<Ret urn>", self.GpCalc)
self.tab4CalcBu tton.grid(padx= 2, pady=2, row=4, column=1, columnspan=2, sticky=W+E)

self.tab4Header = Label(self.fram e4, font="bold", relief=GROOVE)
self.tab4Header["text"] = "Gross Profit"
self.tab4Header .grid(padx=2, pady=2, row=5, column=0, columnspan=4, sticky=W+E)

self.tab4Markup 1 = Label(self.fram e4, width=10, font="bold", relief=GROOVE, bg="white")
self.tab4Markup 1.grid(padx=2, pady=2, row=6, column=1, columnspan=2)

def switch1(self, event):
self.frame1.gri d(sticky=N+S+E+ W)
self.frame2.gri d_forget()
self.frame3.gri d_forget()
self.frame4.gri d_forget()
self.tab1Entry1 .focus_force()
self.tab1Entry1 .select_range(0 , END)
def switch2(self, event):
if self.b == 0:
self.tab2Func(1 )
self.b = 1
self.frame1.gri d_forget()
self.frame2.gri d(sticky=N+S+E+ W)
self.frame3.gri d_forget()
self.frame4.gri d_forget()
self.tab2Entry1 .focus_force()
self.tab2Entry1 .select_range(0 , END)

def switch3(self, event):
if self.c == 0:
self.tab3Func(1 )
self.c = 1
self.frame1.gri d_forget()
self.frame2.gri d_forget()
self.frame3.gri d(sticky=N+S+E+ W)
self.frame4.gri d_forget()
self.tab3Entry1 .focus_force()
self.tab3Entry1 .select_range(0 , END)

def switch4(self, event):
if self.d == 0:
self.tab4Func(1 )
self.d = 1
self.frame1.gri d_forget()
self.frame2.gri d_forget()
self.frame3.gri d_forget()
self.frame4.gri d(sticky=N+S+E+ W)
self.tab4Entry1 .focus_force()
self.tab4Entry1 .select_range(0 , END)

def multiMarkup(sel f, event):
try:
value = self.COG1.get()
except ValueError:
self.COG1 = DoubleVar()
self.tab1Entry1["textvariab le"] = self.COG1

self.tab1Entry1 .select_range(0 , END)

self.tab1Markup 1["text"] = "$", round(self.COG1 .get()/.95, 2)
self.tab1Markup 2["text"] = "$", round(self.COG1 .get()/.90, 2)
self.tab1Markup 3["text"] = "$", round(self.COG1 .get()/.85, 2)
self.tab1Markup 4["text"] = "$", round(self.COG1 .get()/.82, 2)
self.tab1Markup 5["text"] = "$", round(self.COG1 .get()/.80, 2)
self.tab1Markup 6["text"] = "$", round(self.COG1 .get()/.79, 2)
self.tab1Markup 7["text"] = "$", round(self.COG1 .get()/.78, 2)
self.tab1Markup 8["text"] = "$", round(self.COG1 .get()/.77, 2)
self.tab1Markup 9["text"] = "$", round(self.COG1 .get()/.76, 2)
self.tab1Markup 10["text"] = "$", round(self.COG1 .get()/.75, 2)
self.tab1Markup 11["text"] = "$", round(self.COG1 .get()/.74, 2)
self.tab1Markup 12["text"] = "$", round(self.COG1 .get()/.73, 2)
self.tab1Markup 13["text"] = "$", round(self.COG1 .get()/.72, 2)
self.tab1Markup 14["text"] = "$", round(self.COG1 .get()/.71, 2)
self.tab1Markup 15["text"] = "$", round(self.COG1 .get()/.70, 2)
self.tab1Markup 16["text"] = "$", round(self.COG1 .get()/.69, 2)
self.tab1Markup 17["text"] = "$", round(self.COG1 .get()/.67, 2)
self.tab1Markup 18["text"] = "$", round(self.COG1 .get()/.65, 2)
self.tab1Markup 19["text"] = "$", round(self.COG1 .get()/.60, 2)
self.tab1Markup 20["text"] = "$", round(self.COG1 .get()/.55, 2)

def singleMarkup(se lf, event):
try:
value = self.COG2.get()
except ValueError:
self.COG2 = DoubleVar()
self.tab2Entry1["textvariab le"] = self.COG2

try:
value = self.GP1.get()
except ValueError:
self.GP1 = DoubleVar()
self.tab2Entry2["textvariab le"] = self.GP1

self.tab2Entry1 .focus_force()
self.tab2Entry1 .select_range(0 , END)

GP = 1 - (round((self.GP 1.get()/100),2))

self.tab2Markup 1["text"] = "$",round(self. COG2.get()/GP, 2)
self.tab2Header["text"] = self.GP1.get(), "%","Markup "

def priceIncrease(s elf, event):
try:
value = self.COG3.get()
except ValueError:
self.COG3 = DoubleVar()
self.tab3Entry1["textvariab le"] = self.COG3

try:
value = self.PrInc.get( )
except ValueError:
self.PrInc = DoubleVar()
self.tab3Entry2["textvariab le"] = self.PrInc

self.tab3Entry1 .focus_force()
self.tab3Entry1 .select_range(0 , END)

increase = 1+(self.PrInc.g et()/100)

self.tab3Markup 1["text"] = "$",round((self .COG3.get()*inc rease),2)
self.tab3Header["text"] = self.PrInc.get( ), "%","Price","In crease"

def GpCalc(self, event):
try:
value = self.COG4.get()
except ValueError:
self.COG4 = DoubleVar()
self.tab4Entry1["textvariab le"] = self.COG4

try:
value = self.markupPric e.get()
except ValueError:
self.markupPric e = DoubleVar()
self.tab4Entry2["textvariab le"] = self.markupPric e

self.tab4Entry1 .focus_force()
self.tab4Entry1 .select_range(0 , END)

COG4 = self.COG4.get()
markup = self.markupPric e.get()

if COG4==0.0 or markup==0.0:
self.tab4Markup 1["text"] = ""
else:
GP = 100*(1-(self.COG4.get( )/self.markupPric e.get()))
self.tab4Markup 1["text"] = round(GP, 2),"%"
root = Tk()
myapp = MyApp(root)
root.mainloop()

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--
-- Guilherme H. Polo Goncalves