Sales Management System Project in Python

   January 11, 2023
Sales Management System Project in Python

Hello friends, in this article, we will see Sales Management System Project in Python. We will add basic features like adding products, deleting products, updating products, and viewing all products. We have used inbuilt SQLite3 for database purposes and tkinter for GUI.

Project overview: Sales Management System Project in Python

Project Name:Sales Management System Project in Python
Abstract:We will create a GUI-based application that can be used to track the sales of any shop or store
Language Used:Python
IDE:VS Code(recommended)
Database:SQLite3
Type:GUI Application
Recommended for:Beginners and Intermediates of Tkinter

Prerequisites

Requirements and setup

You should have the latest version of Python installed in your system. We have used SQLite3 and tkinter, both come built-in with Python so no need to install them separately. You can use any IDE, we have used VS code. There are no separate files/resources used so you can copy our code and run it directly on your computer and we hope it will run without any errors.

Features

  • Basic features: Adding a product, Updating a product, View all products list, and Deleting a producting
  • Auto calculation: When you will fill in entries to add or update a product, you can verify all your entries and it will auto-calculate prices for total sales.
  • Updated data: Whenever you will perform any CRUD operation(Adding, viewing, updating, or deleting a product), the sales management system app will auto-refresh the updated data.
  • Exception handling: We have created this Sales Management System Project in Python in such a way that it will not crash at any point as we have handled wrong entries or any other exceptions using exception handling in Python.
  • Message/alert: Whenever you perform an operation then you will get an alert message for the operation, if there is any error then you will get the error message.

Coding Sales Management System Project in Python

We have used comments for a better explanation of sub-parts. You can copy and paste this code and directly run it.

# importing libraries
import tkinter as tk
from tkinter import messagebox
import sqlite3

# creating window
root_window = tk.Tk()
root_window.title("CopyAssignment Sales Management")
root_window.geometry("720x750")

# creating entry variables
name_entry_text = tk.StringVar()
id_entry_text = tk.StringVar()
quantity_sold_entry_text = tk.StringVar()
quantity_left_entry_text = tk.StringVar()
price_entry_text = tk.StringVar()
today_sales_quantity_entry_text = tk.StringVar()
today_sales_total_price_entry_text = tk.StringVar()
week_sales_quantity_entry_text = tk.StringVar()
week_sales_total_price_entry_text = tk.StringVar()
month_sales_quantity_entry_text = tk.StringVar()
month_sales_total_price_entry_text = tk.StringVar()

delete_entry = tk.StringVar()

# creating the entries
name_entry = tk.Entry(root_window, textvariable=name_entry_text)
id_entry = tk.Entry(root_window, textvariable=id_entry_text)
quantity_sold_entry = tk.Entry(root_window, textvariable=quantity_sold_entry_text)
quantity_left_entry = tk.Entry(root_window, textvariable=quantity_left_entry_text)
price_entry = tk.Entry(root_window, textvariable=price_entry_text)
today_sales_quantity_entry = tk.Entry(root_window, textvariable=today_sales_quantity_entry_text)
today_sales_total_price_entry = tk.Entry(root_window, textvariable=today_sales_total_price_entry_text)
week_sales_quantity_entry = tk.Entry(root_window, textvariable=week_sales_quantity_entry_text)
week_sales_total_price_entry = tk.Entry(root_window, textvariable=week_sales_total_price_entry_text)
month_sales_quantity_entry = tk.Entry(root_window, textvariable=month_sales_quantity_entry_text)
month_sales_total_price_entry = tk.Entry(root_window, textvariable=month_sales_total_price_entry_text)
delete_entry = tk.Entry(root_window, textvariable=delete_entry, width=20)
delete_entry.grid(row=6, column=3, padx=10, columnspan=3, rowspan=2)

delete_entry.insert(0, 'Enter id to delete')

# create the labels
name_label = tk.Label(root_window, text="Product name")
id_label = tk.Label(root_window, text="Product ID")
quantity_sold_label = tk.Label(root_window, text="Quantity sold")
quantity_left_label = tk.Label(root_window, text="Quantity left")
price_label = tk.Label(root_window, text="Price")
today_sales_quantity_label = tk.Label(root_window, text="Today's Sales(quantity)")
today_sales_total_price_label = tk.Label(root_window, text="Today's Sales(Total Price)")
week_sales_quantity_label = tk.Label(root_window, text="Week Sales(quantity)")
week_sales_total_price_label = tk.Label(root_window, text="Week Sales(Total Price)")
month_sales_quantity_label = tk.Label(root_window, text="Month Sales(quantity)")
month_sales_total_price_label = tk.Label(root_window, text="Month Sales(Total Price)")

product_list_label = tk.Label(root_window, text='Product List', font=(30), borderwidth=1, relief="solid", width=50)
product_list_label.grid(row=12, column=0, columnspan=50, pady=20)

pdt_name = tk.Label(root_window, text='Product Name', borderwidth=1, relief="solid")
pdt_id = tk.Label(root_window, text='Product ID', borderwidth=1, relief="solid")
pdt_price = tk.Label(root_window, text='Product Price', borderwidth=1, relief="solid")
pdt_sales_quantity = tk.Label(root_window, text="Today's Sales(Quantity)", borderwidth=1, relief="solid")

# creating functions
def Refresh():
    conn = sqlite3.connect('database.db')
    cursor = conn.cursor()

    cursor.execute("CREATE TABLE IF NOT EXISTS products (name TEXT, id TEXT PRIMARY KEY, quantitySold TEXT, quantityLeft TEXT, price TEXT, todaySalesQuantity TEXT, todaySalesTotalPrice TEXT, weekSalesQuantity TEXT, weekSalesTotalPrice TEXT, monthSalesQuantity TEXT, monthSalesTotalPrice TEXT)")

    cursor.execute('SELECT * FROM products')
    products = cursor.fetchall()

    for i in range(len(products)):
        tk.Label(root_window, text=products[i][0]).grid(row=i+14, column=0)
        tk.Label(root_window, text=products[i][1]).grid(row=i+14, column=1)
        tk.Label(root_window, text=products[i][4]).grid(row=i+14, column=2)
        tk.Label(root_window, text=products[i][5]).grid(row=i+14, column=3)
    conn.close()

def show_message(title, message):
    messagebox.showerror(title, message)

def add_product():
    try:
        conn = sqlite3.connect("database.db")
        cursor = conn.cursor()
        cursor.execute("INSERT INTO products (name, id, quantitySold, quantityLeft, price, todaySalesQuantity, todaySalesTotalPrice, weekSalesQuantity, weekSalesTotalPrice, monthSalesQuantity, monthSalesTotalPrice) VALUES (?, ?, ?, ?,?,?,?,?,?,?,?)", (str(name_entry_text.get()), str(id_entry_text.get()), str(quantity_sold_entry_text.get()), str(quantity_left_entry_text.get()), str(price_entry_text.get()), str(today_sales_quantity_entry_text.get()), str(today_sales_total_price_entry_text.get()), str(week_sales_quantity_entry_text.get()), str(week_sales_total_price_entry_text.get()), str(month_sales_quantity_entry_text.get()), str(month_sales_total_price_entry_text.get())))

        conn.commit()
    except sqlite3.Error as e:
        show_message('Sqlite error', e)
    finally:
        Refresh()
        conn.close()

def delete_product():
    try:
        conn = sqlite3.connect("database.db")
        cursor = conn.cursor()
        cursor.execute('SELECT * FROM products')
        cursor.execute("DELETE FROM products WHERE id = ?", (str(delete_entry.get())))
        conn.commit()
        show_message('Success', 'Product deleted')
        conn.close()
        Refresh()
    except sqlite3.Error as e:
        show_message('Sqlite error', e)
    finally:
        conn.close()
        Refresh()

def update():
    price = price_entry_text.get()
    quantity_sold = quantity_sold_entry_text.get()
    quantity_left = quantity_left_entry_text.get()
    today_sales_quantity = today_sales_quantity_entry_text.get()
    week_sales_quantity = week_sales_quantity_entry_text.get()
    month_sales_quantity = month_sales_quantity_entry_text.get()
    if len(price) < 1 or len(quantity_sold) < 1 or len(quantity_left) < 1 or len(today_sales_quantity) < 1 or len(week_sales_quantity) < 1 or len(month_sales_quantity) < 1:
        show_message('Python error!', 'Please enter values for all fields')
        return
    try:
        price = int(price)
        quantity_sold = int(quantity_sold)
        quantity_left = int(quantity_left)
        today_sales_quantity = int(today_sales_quantity)
        week_sales_quantity = int(week_sales_quantity)
        month_sales_quantity = int(month_sales_quantity)
        conn = sqlite3.connect('database.db')
        c = conn.cursor()

        c.execute("UPDATE products SET name=?, id=?, quantitySold=?, quantityLeft=?, price=?, todaySalesQuantity=?, todaySalesTotalPrice=?, weekSalesQuantity=?, weekSalesTotalPrice=?, monthSalesQuantity=?, monthSalesTotalPrice=?  WHERE id=?", (str(name_entry_text.get()), str(id_entry_text.get()), str(quantity_sold_entry_text.get()), str(quantity_left_entry_text.get()), str(price_entry_text.get()), str(today_sales_quantity_entry_text.get()), str(today_sales_total_price_entry_text.get()), str(week_sales_quantity_entry_text.get()), str(week_sales_total_price_entry_text.get()), str(month_sales_quantity_entry_text.get()), str(month_sales_total_price_entry_text.get()), str(id_entry_text.get())))
        conn.commit()
        Refresh()
        show_message('Success', 'Product updated')
        conn.close()
    except sqlite3.Error as e:
        show_message('Sqlite error', e)
    finally:
        Refresh()
        conn.close()

def calculate():
    price = price_entry_text.get()
    quantity_sold = quantity_sold_entry_text.get()
    quantity_left = quantity_left_entry_text.get()
    today_sales_quantity = today_sales_quantity_entry_text.get()
    week_sales_quantity = week_sales_quantity_entry_text.get()
    month_sales_quantity = month_sales_quantity_entry_text.get()
    if len(price) < 1 or len(quantity_sold) < 1 or len(quantity_left) < 1 or len(today_sales_quantity) < 1 or len(week_sales_quantity) < 1 or len(month_sales_quantity) < 1:
        show_message('Python error!', 'Please enter values for all fields')
        return
    try:
        price = int(price)
        quantity_sold = int(quantity_sold)
        quantity_left = int(quantity_left)
        today_sales_quantity = int(today_sales_quantity)
        week_sales_quantity = int(week_sales_quantity)
        month_sales_quantity = int(month_sales_quantity)
    except:
        show_message('Python error!', 'Please enter integer values in these fields-> Price, Today Sales(Quantity), Week Sales(Quantity), Month Sales(Quantity)')
        return
    today_sales_total_price = price * today_sales_quantity
    week_sales_total_price = price * week_sales_quantity
    month_sales_total_price = price * month_sales_quantity

    today_sales_total_price_entry_text.set(today_sales_total_price)
    week_sales_total_price_entry_text.set(week_sales_total_price)
    month_sales_total_price_entry_text.set(month_sales_total_price)
    add_button.config(state='normal')

# calling this function to show stored data
Refresh()

# creating buttons
update_button = tk.Button(text='UPDATE', width=20, height=2, command=update)
delete_button = tk.Button(text='DELETE', width=20,height=2, command=delete_product)
add_button = tk.Button(text='ADD', width=20, height=2, command=add_product)
add_button.config(state='disabled')
calculate_button = tk.Button(text='Verify And Calculate Prices', width=25, height=2, command=calculate)
refresh_button = tk.Button(text='Refresh Table', width=25, height=2, command=Refresh)

# placing widgets in the root window using grid
name_label.grid(row=0, column=0, padx=10, pady=10, sticky='w')
id_label.grid(row=1, column=0, padx=10, pady=10, sticky='w')
quantity_sold_label.grid(row=2, column=0, padx=10, pady=10, sticky='w')
quantity_left_label.grid(row=3, column=0, padx=10, pady=10, sticky='w')
price_label.grid(row=4, column=0, padx=10, pady=10, sticky='w')
today_sales_quantity_label.grid(row=5, column=0, padx=10, pady=10, sticky='w')
today_sales_total_price_label.grid(row=6, column=0, padx=10, pady=10, sticky='w')
week_sales_quantity_label.grid(row=7, column=0, padx=10, pady=10, sticky='w')
week_sales_total_price_label.grid(row=8, column=0, padx=10, pady=10, sticky='w')
month_sales_quantity_label.grid(row=9, column=0, padx=10, pady=10, sticky='w')
month_sales_total_price_label.grid(row=10, column=0, padx=10, pady=10, sticky='w')

name_entry.grid(row=0, column=1, padx=10, pady=10, sticky='w')
id_entry.grid(row=1, column=1, padx=10, pady=10, sticky='w')
quantity_sold_entry.grid(row=2, column=1, padx=10, pady=10, sticky='w')
quantity_left_entry.grid(row=3, column=1, padx=10, pady=10, sticky='w')
price_entry.grid(row=4, column=1, padx=10, pady=10, sticky='w')
today_sales_quantity_entry.grid(row=5, column=1, padx=10, pady=10, sticky='w')
today_sales_total_price_entry.grid(row=6, column=1, padx=10, pady=10, sticky='w')
today_sales_total_price_entry.config(state='disabled')
week_sales_quantity_entry.grid(row=7, column=1, padx=10, pady=10, sticky='w')
week_sales_total_price_entry.grid(row=8, column=1, padx=10, pady=10, sticky='w')
week_sales_total_price_entry.config(state='disabled')
month_sales_quantity_entry.grid(row=9, column=1, padx=10, pady=10, sticky='w')
month_sales_total_price_entry.grid(row=10, column=1, padx=10, pady=10, sticky='w')
month_sales_total_price_entry.config(state='disabled')

update_button.grid(row=3, column=2, rowspan=2, padx=15)
delete_button.grid(row=6, column=2, rowspan=2, padx=15)
calculate_button.grid(row=11, column=0, columnspan=2)
add_button.grid(row=11, column=2)
refresh_button.grid(row=11, column=3)

pdt_name.grid(row=13, column=0)
pdt_id.grid(row=13, column=1)
pdt_price.grid(row=13, column=2)
pdt_sales_quantity.grid(row=13, column=3)

root_window.mainloop()

Output for Sales Management System Project in Python

Image output:

output

Video output:

Conclusion

We hope you enjoyed our Sales Management System Project in Python. We have added many features and already mentioned most of the features above but, we encourage you to add more features(like a search option) to make this Sales Management System Project in Python more robust and scalable in real-time. Wish you all the best.

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Author: Yogesh Kumar