Text as QR

You have a text file. Split the text into a list (paragraphs, sentences, words). Generate a QR code for every item of the list and place it on it’s own page.

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import re
from fpdf import FPDF 
import qrcode
from io import BytesIO
from PIL import Image


def create_qr_code(sentence):
    qr = qrcode.QRCode(
        version=1,
        error_correction=qrcode.constants.ERROR_CORRECT_L,
        box_size=10,
        border=4,
    )
    qr.add_data(sentence)
    qr.make(fit=True)

    img = qr.make_image(fill='black', back_color='white')
    return img


def title_page(pdf, title):
    pdf.add_page()
    img = create_qr_code(title)
    img_bytes = BytesIO()
    img.save(img_bytes, format='PNG')
    img_bytes.seek(0)

    # Calculate the width and height of the QR code image
    img_width = 60  # Fixed width for the QR code
    img_height = img.size[1] * (img_width / img.size[0])

    # Calculate the position to center the QR code
    x = (pdf.w - img_width) / 2
    y = (pdf.h - img_height) / 2 - 10

    pdf.image(img_bytes, x=x, y=y, w=img_width, h=img_height)

    # Write the title in parentheses below the QR code
    pdf.set_font("Arial", size=12)
    pdf.set_y(y + img_height + 10)  # Adjust the y-position to place the text below the QR code
    pdf.cell(0, 10, text=f"({title})", align='C')

    pdf.add_page()  # Blank page

def sentences_to_pdf(pdf, sentences):
    for sentence in sentences:
        img = create_qr_code(sentence)
        img_bytes = BytesIO()
        img.save(img_bytes, format='PNG')
        img_bytes.seek(0)

        pdf.add_page()

        # Calculate the width and height of the QR code image
        img_width = pdf.w - 2 * pdf.l_margin
        pdf_image = pdf.image(img_bytes, x=pdf.l_margin, y=pdf.t_margin, w=img_width)

        # Calculate the height of the QR code image
        img_height = (img.size[1] / img.size[0]) * img_width


def split_into_sentences(text):
    # Use regular expression to split by dot followed by a space or end of string
    sentences = re.split(r'(?<=\.)\s*', text)
    
    # Remove empty strings from the list of sentences
    sentences = [sentence for sentence in sentences if sentence]

    return sentences


def main(title, sentences):
    # Create an instance of FPDF
    pdf = FPDF(format=((110, 110)))
    pdf.set_auto_page_break(auto=True, margin=15)

    # Add a title page
    title_page(pdf, title)

    # Add sentences to the PDF
    sentences_to_pdf(pdf, sentences)

    # Check the total number of pages
    total_pages = pdf.page_no()

    # If the total number of pages is odd, add an empty page
    if total_pages % 2 != 0:
        pdf.add_page()

    # Save the PDF to a file
    pdf.output("pdfs/qr.pdf")


with open('data/slow_tech.txt', 'r') as f:
    txt = f.readlines()
    txt = txt[0]

sentences = split_into_sentences(txt)

main('Slow Tech Manifesto', sentences)

/tmp/ipykernel_34470/2275173069.py:40: DeprecationWarning: Substituting font arial by core font helvetica - This is deprecated since v2.7.8, and will soon be removed
  pdf.set_font("Arial", size=12)