In order to facilitate the billing process in grocery stores. Billing software can be easily created with python using tkinter library. As we know Tkinter is a GUI toolkit for python and a perfect library to use for this project. This project will offer an intuitive graphical interface for both customers and store owners to manage transactions seamlessly.

Details of this Billing System Software:

In this project, users can input customer details such as name and phone number, along with the quantity of various grocery items purchased. The application then calculates the total bill amount, including taxes, providing a comprehensive overview of the transaction.

Let’s start with the code now –

create a file and save it with .py extension and copy and paste the below code in it and run it from the terminal

Note: You can make your own changes in the code

from tkinter import *
import random
import os
import sys
from tkinter import messagebox
class Bill_App:
    def __init__(self,root):
        self.root=root
        self.root.geometry("1350x700+0+0")
        self.root.configure(bg="#5B2C6F")
        self.root.title("Billing Software")
        title=Label(self.root,text="Billing System",bd=12,relief=RIDGE,font=("Arial Black",20),bg="#A569BD",fg="white").pack(fill=X)
        #===================================variables=======================================================================================
        self.nutella=IntVar()
        self.noodles=IntVar()
        self.lays=IntVar()
        self.barbone=IntVar()
        self.muffin=IntVar()
        self.silk=IntVar()
        self.soya=IntVar()
        self.atta=IntVar()
        self.pasta=IntVar()
        self.rice=IntVar()
        self.oil=IntVar()
        self.sugar=IntVar()
        self.dal=IntVar()
        self.tea=IntVar()
        self.soap=IntVar()
        self.shampoo=IntVar()
        self.lotion=IntVar()
        self.cream=IntVar()
        self.foam=IntVar()
        self.mask=IntVar()
        self.sanitizer=IntVar()
        self.total_sna=StringVar()
        self.total_gro=StringVar()
        self.total_hyg=StringVar()
        self.a=StringVar()
        self.b=StringVar()
        self.c=StringVar()
        self.c_name=StringVar()
        self.bill_no=StringVar()
        x=random.randint(1000,9999)
        self.bill_no.set(str(x))
        self.phone=StringVar()
        #==========================================customer details label frame=================================================
        details=LabelFrame(self.root,text="Customer Details",font=("Arial Black",12),bg="#A569BD",fg="white",relief=GROOVE,bd=10)
        details.place(x=0,y=80,relwidth=1)
        cust_name=Label(details,text="Customer Name",font=("Arial Black",14),bg="#A569BD",fg="white").grid(row=0,column=0,padx=15)

        cust_entry=Entry(details,borderwidth=4,width=30,textvariable=self.c_name).grid(row=0,column=1,padx=8)

        contact_name=Label(details,text="Contact No.",font=("Arial Black",14),bg="#A569BD",fg="white").grid(row=0,column=2,padx=10)

        contact_entry=Entry(details,borderwidth=4,width=30,textvariable=self.phone).grid(row=0,column=3,padx=8)

        bill_name=Label(details,text="Bill.No.",font=("Arial Black",14),bg="#A569BD",fg="white").grid(row=0,column=4,padx=10)

        bill_entry=Entry(details,borderwidth=4,width=30,textvariable=self.bill_no).grid(row=0,column=5,padx=8)
        #=======================================snacks label frame=================================================================
        snacks=LabelFrame(self.root,text="Snacks",font=("Arial Black",12),bg="#0000FF",fg="#FFFFFF",relief=GROOVE,bd=10)
        snacks.place(x=5,y=180,height=380,width=325)

        item1=Label(snacks,text="Nutella(20Rs)",font=("Arial Black",11),bg="#E5B4F3",fg="#6C3483").grid(row=0,column=0,pady=11)
        item1_entry=Entry(snacks,borderwidth=2,width=15,textvariable=self.nutella).grid(row=0,column=1,padx=10)

        item2=Label(snacks,text="Noodles(1 Pack)",font=("Arial Black",11),bg="#E5B4F3",fg="#6C3483").grid(row=1,column=0,pady=11)
        item2_entry=Entry(snacks,borderwidth=2,width=15,textvariable=self.noodles).grid(row=1,column=1,padx=10)

        item3=Label(snacks,text="Lays(10Rs)",font=("Arial Black",11),bg="#E5B4F3",fg="#6C3483").grid(row=2,column=0,pady=11)
        item3_entry=Entry(snacks,borderwidth=2,width=15,textvariable=self.lays).grid(row=2,column=1,padx=10)

        item4=Label(snacks,text="Barbone(20Rs)",font=("Arial Black",11),bg="#E5B4F3",fg="#6C3483").grid(row=3,column=0,pady=11)
        item4_entry=Entry(snacks,borderwidth=2,width=15,textvariable=self.barbone).grid(row=3,column=1,padx=10)

        item5=Label(snacks,text="Muffin",font=("Arial Black",11),bg="#E5B4F3",fg="#6C3483").grid(row=4,column=0,pady=11)
        item5_entry=Entry(snacks,borderwidth=2,width=15,textvariable=self.muffin).grid(row=4,column=1,padx=10)

        item6=Label(snacks,text="Dairy Milk Silk(60Rs)",font=("Arial Black",11),bg="#E5B4F3",fg="#6C3483").grid(row=5,column=0,pady=11)
        item6_entry=Entry(snacks,borderwidth=2,width=15,textvariable=self.silk).grid(row=5,column=1,padx=10)

        item7=Label(snacks,text="Soya Chunks(15Rs)",font=("Arial Black",11),bg="#E5B4F3",fg="#6C3483").grid(row=6,column=0,pady=11)
        item7_entry=Entry(snacks,borderwidth=2,width=15,textvariable=self.soya).grid(row=6,column=1,padx=10)
        #===================================GROCERY=====================================================================================
        grocery=LabelFrame(self.root,text="Grocery",font=("Arial Black",12),relief=GROOVE,bd=10,bg="#0000FF",fg="#FFFFFF")
        grocery.place(x=340,y=180,height=380,width=325)

        item8=Label(grocery,text="Aashirvaad Atta(1kg)",font=("Arial Black",11),bg="#E5B4F3",fg="#6C3483").grid(row=0,column=0,pady=11)
        item8_entry=Entry(grocery,borderwidth=2,width=15,textvariable=self.atta).grid(row=0,column=1,padx=10)

        item9=Label(grocery,text="Pasta(1kg)",font=("Arial Black",11),bg="#E5B4F3",fg="#6C3483").grid(row=1,column=0,pady=11)
        item9_entry=Entry(grocery,borderwidth=2,width=15,textvariable=self.pasta).grid(row=1,column=1,padx=10)

        item10=Label(grocery,text="Basmathi Rice(1kg)",font=("Arial Black",11),bg="#E5B4F3",fg="#6C3483").grid(row=2,column=0,pady=11)
        item10_entry=Entry(grocery,borderwidth=2,width=15,textvariable=self.rice).grid(row=2,column=1,padx=10)

        item11=Label(grocery,text="Sunflower Oil(1ltr)",font=("Arial Black",11),bg="#E5B4F3",fg="#6C3483").grid(row=3,column=0,pady=11)
        item11_entry=Entry(grocery,borderwidth=2,width=15,textvariable=self.oil).grid(row=3,column=1,padx=10)

        item12=Label(grocery,text="Refined Sugar(1kg)",font=("Arial Black",11),bg="#E5B4F3",fg="#6C3483").grid(row=4,column=0,pady=11)
        item12_entry=Entry(grocery,borderwidth=2,width=15,textvariable=self.sugar).grid(row=4,column=1,padx=10)

        item13=Label(grocery,text="Daal(1kg)",font=("Arial Black",11),bg="#E5B4F3",fg="#6C3483").grid(row=5,column=0,pady=11)
        item13_entry=Entry(grocery,borderwidth=2,width=15,textvariable=self.dal).grid(row=5,column=1,padx=10)

        item14=Label(grocery,text="Tea Powder(1kg)",font=("Arial Black",11),bg="#E5B4F3",fg="#6C3483").grid(row=6,column=0,pady=11)
        item14_entry=Entry(grocery,borderwidth=2,width=15,textvariable=self.tea).grid(row=6,column=1,padx=10)
        #========================================beauty and hygine===============================================================================
        hygine=LabelFrame(self.root,text="Beauty & Hygine",font=("Arial Black",12),relief=GROOVE,bd=10,bg="#0000FF",fg="#FFFFFF")
        hygine.place(x=677,y=180,height=380,width=325)

        item15=Label(hygine,text="Soap",font=("Arial Black",11),bg="#E5B4F3",fg="#6C3483").grid(row=0,column=0,pady=11)
        item15_entry=Entry(hygine,borderwidth=2,width=15,textvariable=self.soap).grid(row=0,column=1,padx=10)

        item16=Label(hygine,text="Shampoo(1ltr)",font=("Arial Black",11),bg="#E5B4F3",fg="#6C3483").grid(row=1,column=0,pady=11)
        item16_entry=Entry(hygine,borderwidth=2,width=15,textvariable=self.shampoo).grid(row=1,column=1,padx=10)

        item17=Label(hygine,text="Body Lotion(1ltr)",font=("Arial Black",11),bg="#E5B4F3",fg="#6C3483").grid(row=2,column=0,pady=11)
        item17_entry=Entry(hygine,borderwidth=2,width=15,textvariable=self.lotion).grid(row=2,column=1,padx=10)

        item18=Label(hygine,text="Cream",font=("Arial Black",11),bg="#E5B4F3",fg="#6C3483").grid(row=3,column=0,pady=11)
        item18_entry=Entry(hygine,borderwidth=2,width=15,textvariable=self.cream).grid(row=3,column=1,padx=10)

        item19=Label(hygine,text="Shaving Foam",font=("Arial Black",11),bg="#E5B4F3",fg="#6C3483").grid(row=4,column=0,pady=11)
        item19_entry=Entry(hygine,borderwidth=2,width=15,textvariable=self.foam).grid(row=4,column=1,padx=10)

        item20=Label(hygine,text="Alovera Mask(1piece)",font=("Arial Black",11),bg="#E5B4F3",fg="#6C3483").grid(row=5,column=0,pady=11)
        item20_entry=Entry(hygine,borderwidth=2,width=15,textvariable=self.mask).grid(row=5,column=1,padx=10)

        item21=Label(hygine,text="Sanitizer(50ml)",font=("Arial Black",11),bg="#E5B4F3",fg="#6C3483").grid(row=6,column=0,pady=11)
        item21_entry=Entry(hygine,borderwidth=2,width=15,textvariable=self.sanitizer).grid(row=6,column=1,padx=10)
        #=====================================================billarea==============================================================================
        billarea=Frame(self.root,bd=10,relief=GROOVE,bg="#E5B4F3")
        billarea.place(x=1010,y=188,width=330,height=372)

        bill_title=Label(billarea,text="Bill Area",font=("Arial Black",17),bd=7,relief=GROOVE,bg="#E5B4F3",fg="#6C3483").pack(fill=X)

        scrol_y=Scrollbar(billarea,orient=VERTICAL)
        self.txtarea=Text(billarea,yscrollcommand=scrol_y.set)
        scrol_y.pack(side=RIGHT,fill=Y)
        scrol_y.config(command=self.txtarea.yview)
        self.txtarea.pack(fill=BOTH,expand=1)
        #=================================================billing menu=========================================================================================
        billing_menu=LabelFrame(self.root,text="Billing Summery",font=("Arial Black",12),relief=GROOVE,bd=10,bg="#A569BD",fg="white")
        billing_menu.place(x=0,y=560,relwidth=1,height=137)

        total_snacks=Label(billing_menu,text="Total Snacks Price",font=("Arial Black",11),bg="#A569BD",fg="white").grid(row=0,column=0)
        total_snacks_entry=Entry(billing_menu,width=30,borderwidth=2,textvariable=self.total_sna).grid(row=0,column=1,padx=10,pady=7)

        total_grocery=Label(billing_menu,text="Total Grocery Price",font=("Arial Black",11),bg="#A569BD",fg="white").grid(row=1,column=0)
        total_grocery_entry=Entry(billing_menu,width=30,borderwidth=2,textvariable=self.total_gro).grid(row=1,column=1,padx=10,pady=7)


        total_hygine=Label(billing_menu,text="Total Beauty & Hygine Price",font=("Arial Black",11),bg="#A569BD",fg="white").grid(row=2,column=0)
        total_hygine_entry=Entry(billing_menu,width=30,borderwidth=2,textvariable=self.total_hyg).grid(row=2,column=1,padx=10,pady=7)

        tax_snacks=Label(billing_menu,text="Snacks Tax",font=("Arial Black",11),bg="#A569BD",fg="white").grid(row=0,column=2)
        tax_snacks_entry=Entry(billing_menu,width=30,borderwidth=2,textvariable=self.a).grid(row=0,column=3,padx=10,pady=7)

        tax_grocery=Label(billing_menu,text="Grocery Tax",font=("Arial Black",11),bg="#A569BD",fg="white").grid(row=1,column=2)
        tax_grocery_entry=Entry(billing_menu,width=30,borderwidth=2,textvariable=self.b).grid(row=1,column=3,padx=10,pady=7)


        tax_hygine=Label(billing_menu,text="Beauty & Hygine Tax",font=("Arial Black",11),bg="#A569BD",fg="white").grid(row=2,column=2)
        tax_hygine_entry=Entry(billing_menu,width=30,borderwidth=2,textvariable=self.c).grid(row=2,column=3,padx=10,pady=7)

        button_frame=Frame(billing_menu,bd=7,relief=GROOVE,bg="#6C3483")
        button_frame.place(x=830,width=500,height=95)

        button_total=Button(button_frame,text="Total Bill",font=("Arial Black",15),pady=10,bg="#E5B4F3",fg="#6C3483",command=lambda:total(self)).grid(row=0,column=0,padx=12)
        button_clear=Button(button_frame,text="Clear Field",font=("Arial Black",15),pady=10,bg="#E5B4F3",fg="#6C3483",command=lambda:clear(self)).grid(row=0,column=1,padx=10,pady=6)
        button_exit=Button(button_frame,text="Exit",font=("Arial Black",15),pady=10,bg="#E5B4F3",fg="#6C3483",width=8,command=lambda:exit1(self)).grid(row=0,column=2,padx=10,pady=6)
        intro(self)


def total(self):
    if (self.c_name.get=="" or self.phone.get()==""):
        messagebox.showerror("Error", "Fill the complete Customer Details!!")
    self.nu=self.nutella.get()*120
    self.no=self.noodles.get()*40
    self.la=self.lays.get()*10
    self.ore=self.barbone.get()*20
    self.mu=self.muffin.get()*30
    self.si=self.silk.get()*60
    self.na=self.soya.get()*15
    total_snacks_price=(
                self.nu+
                self.no+
                self.la+
                self.ore+
                self.mu+
                self.si+
                self.na)
    self.total_sna.set(str(total_snacks_price)+" Rs")
    self.a.set(str(round(total_snacks_price*0.05,3))+" Rs")

    self.at=self.atta.get()*42
    self.pa=self.pasta.get()*120
    self.oi=self.oil.get()*113
    self.ri=self.rice.get()*160
    self.su=self.sugar.get()*55
    self.te=self.tea.get()*480
    self.da=self.dal.get()*76
    total_grocery_price=(
        self.at+
        self.pa+
        self.oi+
        self.ri+
        self.su+
        self.te+
        self.da)

    self.total_gro.set(str(total_grocery_price)+" Rs")
    self.b.set(str(round(total_grocery_price*0.01,3))+" Rs")

    self.so=self.soap.get()*30
    self.sh=self.shampoo.get()*180
    self.cr=self.cream.get()*130
    self.lo=self.lotion.get()*500
    self.fo=self.foam.get()*85
    self.ma=self.mask.get()*100
    self.sa=self.sanitizer.get()*20

    total_hygine_price=(
        self.so+
        self.sh+
        self.cr+
        self.lo+
        self.fo+
        self.ma+
        self.sa)

    self.total_hyg.set(str(total_hygine_price)+" Rs")
    self.c.set(str(round(total_hygine_price*0.10,3))+" Rs")
    self.total_all_bill=(total_snacks_price+
                total_grocery_price+
                total_hygine_price+
                (round(total_grocery_price*0.01,3))+
                (round(total_hygine_price*0.10,3))+
                (round(total_snacks_price*0.05,3)))
    self.total_all_bil=str(self.total_all_bill)+" Rs"
    billarea(self)
def intro(self):
    self.txtarea.delete(1.0,END)
    self.txtarea.insert(END,"\tWELCOME TO SUPER MARKET\n\tPhone-No.6254109")
    self.txtarea.insert(END,f"\n\nBill no. : {self.bill_no.get()}")
    self.txtarea.insert(END,f"\nCustomer Name : {self.c_name.get()}")
    self.txtarea.insert(END,f"\nPhone No. : {self.phone.get()}")
    self.txtarea.insert(END,"\n====================================\n")
    self.txtarea.insert(END,"\nProduct\t\tQty\tPrice\n")
    self.txtarea.insert(END,"\n====================================\n")
def billarea(self):
    intro(self)
    if self.nutella.get()!=0:
        self.txtarea.insert(END,f"Nutella\t\t {self.nutella.get()}\t{self.nu}\n")
    if self.noodles.get()!=0:
        self.txtarea.insert(END,f"Noodles\t\t {self.noodles.get()}\t{self.no}\n")
    if self.lays.get()!=0:
        self.txtarea.insert(END,f"Lays\t\t {self.lays.get()}\t{self.la}\n")
    if self.oreo.get()!=0:
        self.txtarea.insert(END,f"Oreo\t\t {self.oreo.get()}\t{self.ore}\n")
    if self.muffin.get()!=0:
        self.txtarea.insert(END,f"Muffins\t\t {self.muffin.get()}\t{self.mu}\n")
    if self.silk.get()!=0:
        self.txtarea.insert(END,f"Silk\t\t {self.silk.get()}\t{self.si}\n")
    if self.namkeen.get()!=0:
        self.txtarea.insert(END,f"Namkeen\t\t {self.namkeen.get()}\t{self.na}\n")
    if self.atta.get()!=0:
        self.txtarea.insert(END,f"Atta\t\t {self.atta.get()}\t{self.at}\n")
    if self.pasta.get()!=0:
        self.txtarea.insert(END,f"Pasta\t\t {self.pasta.get()}\t{self.pa}\n")
    if self.rice.get()!=0:
        self.txtarea.insert(END,f"Rice\t\t {self.rice.get()}\t{self.ri}\n")
    if self.oil.get()!=0:
        self.txtarea.insert(END,f"Oil\t\t {self.oil.get()}\t{self.oi}\n")
    if self.sugar.get()!=0:
        self.txtarea.insert(END,f"Sugar\t\t {self.sugar.get()}\t{self.su}\n")
    if self.dal.get()!=0:
        self.txtarea.insert(END,f"Daal\t\t {self.dal.get()}\t{self.da}\n")
    if self.tea.get()!=0:
        self.txtarea.insert(END,f"Tea\t\t {self.tea.get()}\t{self.te}\n")
    if self.soap.get()!=0:
        self.txtarea.insert(END,f"Soap\t\t {self.soap.get()}\t{self.so}\n")
    if self.shampoo.get()!=0:
        self.txtarea.insert(END,f"Shampoo\t\t {self.shampoo.get()}\t{self.sh}\n")
    if self.lotion.get()!=0:
        self.txtarea.insert(END,f"Lotion\t\t {self.lotion.get()}\t{self.lo}\n")
    if self.cream.get()!=0:
        self.txtarea.insert(END,f"Cream\t\t {self.cream.get()}\t{self.cr}\n")
    if self.foam.get()!=0:
        self.txtarea.insert(END,f"Foam\t\t {self.foam.get()}\t{self.fo}\n")
    if self.mask.get()!=0:
        self.txtarea.insert(END,f"Mask\t\t {self.mask.get()}\t{self.ma}\n")
    if self.sanitizer.get()!=0:
        self.txtarea.insert(END,f"Sanitizer\t\t {self.sanitizer.get()}\t{self.sa}\n")

    self.txtarea.insert(END,f"------------------------------------\n")
    if self.a.get()!="0.0 Rs":
        self.txtarea.insert(END,f"Total Snacks Tax : {self.a.get()}\n")
    if self.b.get()!="0.0 Rs":
        self.txtarea.insert(END,f"Total Grocery Tax : {self.b.get()}\n")
    if self.c.get()!="0.0 Rs":
        self.txtarea.insert(END,f"Total Beauty&Hygine Tax : {self.c.get()}\n")
    self.txtarea.insert(END,f"Total Bill Amount : {self.total_all_bil}\n")
    self.txtarea.insert(END,f"------------------------------------\n")
def clear(self):
        self.txtarea.delete(1.0,END)
        self.nutella.set(0)
        self.noodles.set(0)
        self.lays.set(0)
        self.oreo.set(0)
        self.muffin.set(0)
        self.silk.set(0)
        self.namkeen.set(0)
        self.atta.set(0)
        self.pasta.set(0)
        self.rice.set(0)
        self.oil.set(0)
        self.sugar.set(0)
        self.dal.set(0)
        self.tea.set(0)
        self.soap.set(0)
        self.shampoo.set(0)
        self.lotion.set(0)
        self.cream.set(0)
        self.foam.set(0)
        self.mask.set(0)
        self.sanitizer.set(0)
        self.total_sna.set(0)
        self.total_gro.set(0)
        self.total_hyg.set(0)
        self.a.set(0)
        self.b.set(0)
        self.c.set(0)
        self.c_name.set(0)
        self.bill_no.set(0)
        self.bill_no.set(0)
        self.phone.set(0)
def exit1(self):
    self.root.destroy()

root=Tk()
obj=Bill_App(root)
root.mainloop()

Output:

Explanation of the above code:

1. from tkinter import *: This line imports all the classes and functions from the tkinter module, which is used for creating graphical user interfaces (GUIs).
2. import random: This line imports the random module, which is used for generating random numbers.
3. import os: This line imports the os module, which provides functions for interacting with the operating system.
4. import sys: This line imports the sys module, which provides functions and variables used to manipulate different parts of the Python runtime environment.
5. from tkinter import messagebox: This line imports the messagebox class from the tkinter module, which is used to display messages in a pop-up dialog box.
6. class Bill_App:: This line defines a new class called Bill_App, which will be used to create instances of a billing application.
7. def __init__(self,root):: This line defines the __init__ method of the Bill_App class, which is a special method called when a new instance of the class is created. It takes one argument, root, which is a reference to the main window of the application.
8. self.root=root: This line assigns the root argument to an instance variable called root, so it can be accessed within other methods of the class.
9. self.root.geometry("1350x700+0+0"): This line sets the initial size and position of the main window.
10. self.root.configure(bg="#5B2C6F"): This line sets the background color of the main window.
11. self.root.title("Billing Software"): This line sets the title of the main window.
12. title=Label(self.root,text="Billing System",bd=12,relief=RIDGE,font=("Arial Black",20),bg="#A569BD",fg="white").pack(fill=X): This line creates a label widget with the text “Billing System” and some styling, and packs it into the main window.
13. The following lines define various instance variables using the IntVar() and StringVar() classes, which are used to store data and update the GUI based on user input.
14. The lines starting with details=LabelFrame(...) to bill_entry=Entry(...) create a section in the GUI for entering customer details like name, phone number, and bill number.
15. Similar sections are created for entering the quantity of various items in the snacks, grocery, and beauty & hygiene categories.
16. The lines starting with button_total=Button(...) to button_exit=Button(...) create buttons for calculating the total bill, clearing the fields, and exiting the application.
17. The total, intro, billarea, clear, and exit1 functions are defined to handle various aspects of the billing process, such as calculating the total bill, displaying the bill details, clearing the fields, and exiting the application.
18. Finally, the main Tk() instance is created, and an instance of the Bill_App class is created, which starts the GUI application.

Conclusion:

the Super Mart Billing System created using Python and Tkinter provides an efficient way to manage billing processes. It allows users to enter customer details, select items from different categories, and generates a detailed bill summary. The system enhances the shopping experience by automating calculations and providing a clear overview of the purchased items and their prices. Overall, it simplifies the billing process for both customers and store owners.