import qrcode

img = qrcode.make('Some data here')

type(img)  # qrcode.image.pil.PilImage

img.save("some_file.png")

import os

import qrcode

​

img = qrcode.make("https://Your-URL-here")

​

img.save("qr.png", "PNG")

​

os.system("display qr.png")

# pip install pyqrcode

#pip install pypng

​

import pyqrcode

import png

from pyqrcode import QRCode

​

string = 'www.google.com'

url = pyqrcode.create(string)

​

url.svg("myqr.svg" , scale = 8)

url.png("myqr.png" , scale = 6)

pip install qrcode[pil]

​

#!/usr/bin/env python3

​

import numpy as np

​

def qr(A):

    m, n = A.shape

    Q = np.eye(m)

    for i in range(n - (m == n)):

        H = np.eye(m)

        H[i:, i:] = make_householder(A[i:, i])

        Q = np.dot(Q, H)

        A = np.dot(H, A)

    return Q, A

​

def make_householder(a):

    v = a / (a[0] + np.copysign(np.linalg.norm(a), a[0]))

    v[0] = 1

    H = np.eye(a.shape[0])

    H -= (2 / np.dot(v, v)) * np.dot(v[:, None], v[None, :])

    return H

​

# task 1: show qr decomp of wp example

a = np.array(((

    (12, -51,   4),

    ( 6, 167, -68),

    (-4,  24, -41),

)))

​

q, r = qr(a)

print('q:\n', q.round(6))

print('r:\n', r.round(6))

​

# task 2: use qr decomp for polynomial regression example

def polyfit(x, y, n):

    return lsqr(x[:, None]**np.arange(n + 1), y.T)

​

def lsqr(a, b):

    q, r = qr(a)

    _, n = r.shape

    return np.linalg.solve(r[:n, :], np.dot(q.T, b)[:n])

​

x = np.array((0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10))

y = np.array((1, 6, 17, 34, 57, 86, 121, 162, 209, 262, 321))

​

print('\npolyfit:\n', polyfit(x, y, 2))

import qrcode

img=qrcode.make("message")

img.save("pic.png")    //save the qrcode photo as pic.png

# Import QRCode from pyqrcode

import pyqrcode

import png

from pyqrcode import QRCode

# String which represents the QR code

s = "www.codingforfree.com"

# Generate QR code

url = pyqrcode.create(s)

# Create and save the svg file naming "myqr.svg"

url.svg("myqr.svg", scale = 8)

# Create and save the png file naming "myqr.png"

url.png('myqr.png', scale = 6)

#Install modules -> qrcode , pillow

​

import qrcode

import PIL

​

qr = qrcode.QRCode(version=1,

                    error_correction=qrcode.constants.ERROR_CORRECT_H,

                    box_size=100, border=1)

​

qr.add_data("https://rafiulislamrohan.github.io/rafiulislam")

​

qr.make(fit=True)

img = qr.make_image(fill_color="#90EE90", back_color="black")

​

img.save("Rafiul_Islam.png")

​

import tempfile

import segno

import xlwings as xw

​

​

def main():

    book = xw.Book.caller()

    sheet = xw.sheets[0]

    # Start at the selected cell

    start_cell = book.app.selection

    if start_cell.value is None:

        raise TypeError('Please select a cell with a value!')

    urls = start_cell.options(expand='down', ndim=1).value

    # Loop through each URL and generate the QR code

    for ix, url in enumerate(urls):

        # Generate the QR code

        qr = segno.make(url)

        with tempfile.TemporaryDirectory() as td:

            # Save the QR code as a temporary svg file. If you are on macOS, use pdf

            # instead and if you don't have Microsoft 365, you may have to use png

            filepath = f'{td}/qr.svg'

            qr.save(filepath, scale=5, border=0, finder_dark='#15a43a')

            # Insert the QR code to the right of the URL

            destination_cell = start_cell.offset(row_offset=ix, column_offset=1)

            sheet.pictures.add(filepath,

                               left=destination_cell.left,

                               top=destination_cell.top)

import pyqrcode

import png

from PIL import Image

s = "https://python.plainenglish.io/" # url to open after scanning qr code

url = pyqrcode.create(s) # creating qr code

img = "python-in-plain-english.png" # name of image

url.png(img, scale=10) # saving image as png

im=Image.open(img) # opening image

im.show()