Generating QR code on Tkinter window from user entry and saving image

A Quick Response Code ( QR Code ) is a machine-readable optical label that contains information about the item to which it is attached. Usually it is an ID or a link or some text which connects to more details.
The data is readable by a scanner. Smart phones can be used as scanner also.

Tkinter QR code generator using pyqrcode library to display and saving images as SVG or PNG file

Libraries required to generate QR code in Tkinter window

There are many libraries available in Python to generate QR code. The reason for going for pyqrcode is the .xbm format image which can easily integrated with Tkinter so no need to save the image first and then display. However we can still save the image in local system by using pypng library.

pip install pyqrcode

To save the image in .png format, we will install pypng

pip install pypng

Generating QR code

Here we are using one string 'plus2net.com' to generate the QR code.

my_qr = pyqrcode.create('plus2net.com')
my_qr = my_qr.xbm(scale=10)
my_img=tk.BitmapImage(data=my_qr)

We can use my_img inside a label to display the image ( QR code ) by using config() method. Here we are only displaying the QR code and not storing the image in local system.

l1.config(image=my_img)

Saving as SVG file

We can save the image ( QR code ) in Scalable Vector Graphics (SVG) format

my_qr.svg('G:\\My Drive\\testing\\my_qr.svg', scale=8)

Saving as PNG file

We have to install pypng to save the image in local file system. Change the path to save the image based on your local system.

my_qr.png('G:\\My Drive\\testing\\my_qr1.png', scale=6, 
        module_color=[0, 0, 0, 128], background=[0xff, 0xcc, 0xcc])

Full code with saving option is here.

import pyqrcode
from pyqrcode import create
import tkinter as tk
from tkinter import * 
import png # pip install pypng ## to save in png format

my_w = tk.Tk()
my_w.geometry("410x400")  # Size of the window 
my_w.title("www.plus2net.com")  # Adding a title

e1=tk.Entry(my_w,font=22,bg='yellow',width=15)
e1.grid(row=0,column=0,padx=10,pady=10)
b1=tk.Button(my_w,font=22,text='Generate QR code',
    command=lambda:my_generate())
b1.grid(row=0,column=1,padx=5,pady=10)

l1=tk.Label(my_w,text='QR to display here')
l1.grid(row=1,column=0,columnspan=2)
def my_generate():
    global my_img
    my_qr = pyqrcode.create(e1.get()) 
    #my_qr.svg('G:\\My Drive\\testing\\my_qr.svg', scale=8)#save svg
    my_qr.png('G:\\My Drive\\testing\\my_qr1.png', scale=6, 
        module_color=[0, 0, 0, 128], background=[0xff, 0xcc, 0xcc])
    my_qr.show() # display qr code image  in console 
    my_qr = my_qr.xbm(scale=10)
    my_img=tk.BitmapImage(data=my_qr)
    l1.config(image=my_img) # Show the qr code in Label 
my_w.mainloop()  # Keep the window open

Adding logo ( image ) to QR code

Installing PIL

pip install Pillow

Change your path based on local system.

import pyqrcode
from PIL import Image
#url = pyqrcode.QRCode('https://www.plus2net.com',error = 'H')
url = pyqrcode.QRCode('welcome to plus2net',error = 'H')
url.png('D:\\my_qr_code.png',scale=10)
im = Image.open('D:\\my_qr_code.png')
im = im.convert("RGBA")
logo = Image.open("D:\\p2n-logo\\top2.jpg") # path to logo file 
box = (100,165,280,200) # dimension for the logo to fix
im.crop(box)
region = logo
region = region.resize((box[2] - box[0], box[3] - box[1]))
im.paste(region,box)
im.show()
im.save("D:\\my_qr_code.png","PNG") # change your path

QR code with logo in Tkinter window

import pyqrcode
from pyqrcode import create
import tkinter as tk
import png # pip install pypng ## to save in png format
from PIL import Image
my_w = tk.Tk()
my_w.geometry("410x400")  # Size of the window 
my_w.title("www.plus2net.com")  # Adding a title

e1=tk.Entry(my_w,font=22,bg='yellow',width=15)
e1.grid(row=0,column=0,padx=10,pady=4)
b1=tk.Button(my_w,font=22,text='Generate QR code',
    command=lambda:my_generate())
b1.grid(row=0,column=1,padx=5,pady=4)

l1=tk.Label(my_w,text='QR to display here')
l1.grid(row=1,column=0,columnspan=2)
path='G:\\My Drive\\testing\\my_qr2.png' # Update your path
def my_generate():
    global my_img
    my_qr = pyqrcode.QRCode(e1.get(),error = 'H') 
    my_qr.png(path, scale=10,module_color=[0, 0, 0, 128], 
        background=[0xff, 0xcc, 0xcc])
    im = Image.open(path)
    im = im.convert("RGBA")
    logo = Image.open("D:\\p2n-logo\\top2.jpg")
    box = (90,150,250,170) # dimension for the logo to fix
    im.crop(box)
    region = logo
    region = region.resize((box[2] - box[0], box[3] - box[1]))
    im.paste(region,box)
    im.show() # display in console 
    im.save("path","PNG")
    my_img = tk.PhotoImage(file = "path") 
    l1.config(image=my_img) # Show the qr code in Label 

my_w.mainloop()  # Keep the window open

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Subhendu Mohapatra

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Generating QR code in Tkinter