Aprendendo Python

Depois de muito tempo inativo volto com um código de calculadora e controle de lanchonete feito em Python conforme videos do youtube - aqui

Segue o código:

from tkinter import*
import random
import time;
from tkinter import Entry

root = Tk()
root.geometry("1600x800+0+0")
root.title("Sistema de Administração de Restaurante")

text_Input = StringVar()
operator = ""

Tops = Frame(root, width = 1600, height = 50, bg = "powder blue", relief=SUNKEN)
Tops.pack(side=TOP)

f1 = Frame(root, width = 800, height = 700, relief=SUNKEN)
f1.pack(side=LEFT)

f2 = Frame(root, width = 300, height = 700, relief=SUNKEN)
f2.pack(side=RIGHT)

#====================================Time=========================================

localtime = time.asctime(time.localtime(time.time()))

#====================================Info=========================================

lblInfo = Label(Tops, font=('arial', 40, 'bold'), text = "Sistema de Administração de Restaurante", fg = "Steel Blue", bd = 10, anchor = 'w')
lblInfo.grid(row = 0, column = 0)

lblDateTime = Label(Tops, font=('arial', 25, 'bold'), text = localtime, fg = "Steel Blue", bd = 10, anchor = 'w')
lblDateTime.grid(row = 1, column = 0)

#==================================Calculadora====================================
def btnClick(numbers):
    global operator
    operator = operator + str(numbers)
    text_Input.set(operator)

def btnClearDisplay():
    global operator
    operator=""
    text_Input.set ("")

def btnEqualsInput():
    global operator
    sumup = str(eval(operator))
    text_Input.set (sumup)
    operator = ""

def Ref():
    x = random.randint(10908, 500876)
    randomRef = str(x)
    rand.set(randomRef)

    CoF = float(Fries.get())
    CoD = float (Drinks.get())
    CoFilet = float (Filet.get ())
    CoBurger = float (Burger.get ())
    CoChicBurger = float (Chicken_Burger.get ())
    CoCheese_Burger = float (Cheese_Burger.get ())

    CostofFries = CoF * 0.99
    CostofDrinks = CoD * 1.00
    CostofFilet = CoFilet * 2.99
    CostofBurger = CoBurger * 2.87
    CostofChicken_Burger = CoChicBurger * 2.89
    CostofCheese_Burger = CoCheese_Burger * 2.69

    CostofMeal = "£", str('%.2f' % (CostofFries + CostofDrinks + CostofFilet + CostofBurger
                                    + CostofChicken_Burger+ CostofCheese_Burger))

    PayTax = ((CostofFries + CostofDrinks + CostofFilet + CostofBurger
                                    + CostofChicken_Burger+ CostofCheese_Burger) * 0.2)

    TotalCost = (CostofFries + CostofDrinks + CostofFilet + CostofBurger
                                    + CostofChicken_Burger+ CostofCheese_Burger)

    Ser_Charge = ((CostofFries + CostofDrinks + CostofFilet + CostofBurger
                                    + CostofChicken_Burger+ CostofCheese_Burger)/99)

    Service = "£", str('%.2f' % Ser_Charge)

    OverAllCost = "£", str('%.2f' % (PayTax + TotalCost + Ser_Charge))
    PaidTax = "£", str('%.2f' % PayTax)

    Service_Charge.set(Service)
    Cost.set(CostofMeal)
    Tax.set(PaidTax)
    SubTotal.set(CostofMeal)
    Total.set(OverAllCost)

def qExit():
    root.destroy()

def Reset():
    rand.set ("")
    Fries.set ("")
    Burger.set ("")
    Filet.set ("")
    SubTotal.set ("")
    Total.set ("")
    Service_Charge.set ("")
    Drinks.set ("")
    Tax.set ("")
    Cost.set ("")
    Chicken_Burger.set ("")
    Cheese_Burger.set ("")


txtDisplay= Entry(f2, font=('arial', 20,'bold'), textvariable=text_Input, bd=30, bg="powder blue", insertwidth=4, justify='right')
txtDisplay.grid(columnspan=4)

btn7=Button(f2, padx=16, pady=16, bd=8, fg="black", font=('arial', 20,'bold'),
            text="7", bg="powder blue", command=lambda: btnClick(7)) .grid(row=2, column=0)

btn8=Button(f2, padx=16, pady=16, bd=8, fg="black", font=('arial', 20,'bold'),
            text="8", bg="powder blue", command=lambda: btnClick(8)) .grid(row=2, column=1)

btn9=Button(f2, padx=16, pady=16, bd=8, fg="black", font=('arial', 20,'bold'),
            text="9", bg="powder blue", command=lambda: btnClick(9)) .grid(row=2, column=2)

Addition=Button(f2, padx=16, pady=16, bd=8, fg="black", font=('arial', 20,'bold'),
            text="+", bg="powder blue", command=lambda: btnClick("+")) .grid(row=2, column=3)
#-------------------------------------------------------------------------------------------------------

btn4=Button(f2, padx=16, pady=16, bd=8, fg="black", font=('arial', 20,'bold'),
            text="4", bg="powder blue", command=lambda: btnClick(4)) .grid(row=3, column=0)

btn5=Button(f2, padx=16, pady=16, bd=8, fg="black", font=('arial', 20,'bold'),
            text="5", bg="powder blue", command=lambda: btnClick(5)) .grid(row=3, column=1)

btn6=Button(f2, padx=16, pady=16, bd=8, fg="black", font=('arial', 20,'bold'),
            text="6", bg="powder blue", command=lambda: btnClick(6)) .grid(row=3, column=2)

Subtraction=Button(f2, padx=16, pady=16, bd=8, fg="black", font=('arial', 20,'bold'),
            text="-", bg="powder blue", command=lambda: btnClick("-")) .grid(row=3, column=3)
#-------------------------------------------------------------------------------------------------------

btn1=Button(f2, padx=16, pady=16, bd=8, fg="black", font=('arial', 20,'bold'),
            text="1", bg="powder blue", command=lambda: btnClick(1)) .grid(row=4, column=0)

btn2=Button(f2, padx=16, pady=16, bd=8, fg="black", font=('arial', 20,'bold'),
            text="2", bg="powder blue", command=lambda: btnClick(2)) .grid(row=4, column=1)

btn3=Button(f2, padx=16, pady=16, bd=8, fg="black", font=('arial', 20,'bold'),
            text="3", bg="powder blue", command=lambda: btnClick(3)) .grid(row=4, column=2)

Mutiplay=Button(f2, padx=16, pady=16, bd=8, fg="black", font=('arial', 20,'bold'),
            text="*", bg="powder blue", command=lambda: btnClick("*")) .grid(row=4, column=3)
#-------------------------------------------------------------------------------------------------------
btn0=Button(f2, padx=16, pady=16, bd=8, fg="black", font=('arial', 20,'bold'),
            text="0", bg="powder blue", command=lambda: btnClick(0)) .grid(row=5, column=0)

btnClear=Button(f2, padx=16, pady=16, bd=8, fg="black", font=('arial', 20,'bold'),
            text="C", bg="powder blue", command= btnClearDisplay).grid(row=5, column=1)

btnEquals=Button(f2, padx=16, pady=16, bd=8, fg="black", font=('arial', 20,'bold'),
            text="=", bg="powder blue", command=btnEqualsInput) .grid(row=5, column=2)

Division=Button(f2, padx=16, pady=16, bd=8, fg="black", font=('arial', 20,'bold'),
            text="/", bg="powder blue", command=lambda: btnClick("/")) .grid(row=5, column=3)
#------------------------------------Restaurante Info 1-------------------------------------------------------------

rand = StringVar()
Fries = StringVar()
Burger = StringVar()
Filet = StringVar()
SubTotal = StringVar()
Total = StringVar()
Service_Charge = StringVar()
Drinks = StringVar()
Tax = StringVar()
Cost = StringVar()
Chicken_Burger = StringVar()
Cheese_Burger = StringVar()

lblReference = Label(f1, font=('arial', 16,'bold'), text = "Nº Pedido", bd=16, anchor='w')
lblReference.grid(row=0, column=0)
txtReference= Entry(f1, font=('arial', 16,'bold'), textvariable= rand, bd=10, insertwidth=4,
                    bg= "powder blue", justify = 'right')
txtReference.grid(row=0, column=1)

lblFries = Label(f1, font=('arial', 16,'bold'), text = "Batata Frita", bd=16, anchor='w')
lblFries.grid(row=1, column=0)
txtFries= Entry(f1, font=('arial', 16,'bold'), textvariable= Fries, bd=10, insertwidth=4,
                    bg= "powder blue", justify = 'right')
txtFries.grid(row=1, column=1)

lblBurger = Label(f1, font=('arial', 16,'bold'), text = "Burger Meal", bd=16, anchor='w')
lblBurger.grid(row=2, column=0)
txtBurger= Entry(f1, font=('arial', 16,'bold'), textvariable= Burger, bd=10, insertwidth=4,
                    bg= "powder blue", justify = 'right')
txtBurger.grid(row=2, column=1)

lblFilet = Label(f1, font=('arial', 16,'bold'), text = "Filet_o_Meal", bd=16, anchor='w')
lblFilet.grid(row=3, column=0)
txtFilet= Entry(f1, font=('arial', 16,'bold'), textvariable= Filet, bd=10, insertwidth=4,
                    bg= "powder blue", justify = 'right')
txtFilet.grid(row=3, column=1)

lblChicken = Label(f1, font=('arial', 16,'bold'), text = "Chicken Meal", bd=16, anchor='w')
lblChicken.grid(row=4, column=0)
txtChicken= Entry(f1, font=('arial', 16,'bold'), textvariable= Chicken_Burger, bd=10, insertwidth=4,
                    bg= "powder blue", justify = 'right')
txtChicken.grid(row=4, column=1)

lblCheese = Label(f1, font=('arial', 16,'bold'), text = "Cheese Meal", bd=16, anchor='w')
lblCheese.grid(row=5, column=0)
txtCheese= Entry(f1, font=('arial', 16,'bold'), textvariable= Cheese_Burger, bd=10, insertwidth=4,
                    bg= "powder blue", justify = 'right')
txtCheese.grid(row=5, column=1)
#------------------------------------Restaurante Info 2---------------------------------------------------------

lblDrinks = Label(f1, font=('arial', 16,'bold'), text = "Drinks", bd=16, anchor='w')
lblDrinks.grid(row=0, column=2)
txtDrinks= Entry(f1, font=('arial', 16,'bold'), textvariable= Drinks, bd=10, insertwidth=4,
                    bg= "#ffffff", justify = 'right')
txtDrinks.grid(row=0, column=3)

lblCost = Label(f1, font=('arial', 16,'bold'), text = "Cost of Meal", bd=16, anchor='w')
lblCost.grid(row=1, column=2)
txtCost= Entry(f1, font=('arial', 16,'bold'), textvariable= Cost, bd=10, insertwidth=4,
                    bg= "#ffffff", justify = 'right')
txtCost.grid(row=1, column=3)

lblService = Label(f1, font=('arial', 16,'bold'), text = "Service Charge", bd=16, anchor='w')
lblService.grid(row=2, column=2)
txtService= Entry(f1, font=('arial', 16,'bold'), textvariable= Service_Charge, bd=10, insertwidth=4,
                    bg= "#ffffff", justify = 'right')
txtService.grid(row=2, column=3)

lblStateTax = Label(f1, font=('arial', 16,'bold'), text = "State Tax", bd=16, anchor='w')
lblStateTax.grid(row=3, column=2)
txtStateTax= Entry(f1, font=('arial', 16,'bold'), textvariable= Tax, bd=10, insertwidth=4,
                    bg= "#ffffff", justify = 'right')
txtStateTax.grid(row=3, column=3)

lblSubTotal = Label(f1, font=('arial', 16,'bold'), text = "Sub Total", bd=16, anchor='w')
lblSubTotal.grid(row=4, column=2)
txtSubTotal= Entry(f1, font=('arial', 16,'bold'), textvariable= SubTotal, bd=10, insertwidth=4,
                    bg= "#ffffff", justify = 'right')
txtSubTotal.grid(row=4, column=3)

lblTotalCost = Label(f1, font=('arial', 16,'bold'), text = "Total Cost", bd=16, anchor='w')
lblTotalCost.grid(row=5, column=2)
txtTotalCost= Entry(f1, font=('arial', 16,'bold'), textvariable= Total, bd=10, insertwidth=4,
                    bg= "#ffffff", justify = 'right')
txtTotalCost.grid(row=5, column=3)
#===========================================Buttons===================================================

btnTotal = Button(f1, padx=16, pady = 8, bd = 16, fg = "black", font=('arial', 16,'bold'), width = 10,
                  text = "Total", bg = "powder blue", command = Ref).grid(row = 7, column = 1)

btnReset = Button(f1, padx=16, pady = 8, bd = 16, fg = "black", font=('arial', 16,'bold'), width = 10,
                  text = "Reset", bg = "powder blue", command = Reset).grid(row = 7, column = 2)

btnExit = Button(f1, padx=16, pady = 8, bd = 16, fg = "black", font=('arial', 16,'bold'), width = 10,
                  text = "Exit", bg = "powder blue", command = qExit).grid(row = 7, column = 3)



root.mainloop()