Template for generating a multi-page PDF with py5 (and a bonus PDF "overlay" script)

multiple_page_pdf_py5_imported_mode.py

"""
An example/template for generating a mutiple page PDF using py5.
Imported mode style - You'll need to use the thonny-py5mode plug-in or the sketch_runner tool

CC0 / Public Domain dedication - by Alexandre B A Villares
"""

NUM_PAGES = 10
s = 0.71  # scale factor  1 => 356 x 275  trying 252 x 195
rs = 1    # starting random seed
save_pdf = False

def setup():
    global w, h
    size(1760, 764)  # 441mm x 191mm

def draw():
    global save_pdf, rs
    if save_pdf:
        pdf_output.scale(s)

    # YOU DRAWING GOES HERE
    background(240)
    random_seed(rs)
    fill(0)
    text(f'seed: {rs}', 35, 12)
    for x in range(0, width, 50):
        line(x, 50, x + random(-50, 50), height - 50)
    # END DRAWING HERE

    if save_pdf:
        print(save_pdf)
        save_pdf -= 1
        if save_pdf:
            rs += 1
            pdf_output.next_page() 
        else:
            end_record()

def key_pressed():
    global save_pdf, pdf_output
    if key == 's':
        save_pdf = NUM_PAGES
        pdf_output = create_graphics(int(width * s), int(height * s),
                                         PDF, f'output-{NUM_PAGES}.pdf')
        begin_record(pdf_output)

multiple_page_pdf_py5_module_mode.py

"""
An example/template for generating a mutiple page PDF using py5.
Module mode style - https://py5coding.org/content/py5_modes.html

CC0 / Public Domain dedication - by Alexandre B A Villares
"""
import py5     

NUM_PAGES = 10
s = 0.71  # scale factor  1 => 356 x 275  trying 252 x 195
rs = 1    # starting random seed
save_pdf = False

def setup():
    global w, h
    py5.size(1760, 764)  # 441mm x 191mm

def draw():
    global save_pdf, rs 
    if save_pdf:
        pdf_output.scale(s)

    # YOU DRAWING GOES HERE
    py5.background(240)
    py5.random_seed(rs)
    py5.fill(0)
    py5.text(f'seed: {rs}', 35, 12)
    for x in range(0, py5.width, 50):
        py5.line(x, 50, x + py5.random(-50, 50), py5.height - 50)
    # END DRAWING HERE

    if save_pdf:
        print(save_pdf)
        save_pdf -= 1
        if save_pdf:
            rs += 1
            pdf_output.next_page()
        else:
            py5.end_record()

def key_pressed():
    global save_pdf, pdf_output
    if py5.key == 's':
        save_pdf = NUM_PAGES
        pdf_output = py5.create_graphics(int(py5.width * s), int(py5.height * s),
                                         py5.PDF, f'output-{NUM_PAGES}.pdf')
        py5.begin_record(pdf_output)

py5.run_sketch()

overlay_pdfs.py

#!/usr/bin/env python

# Requires pdfrw2 - https://pypi.org/project/pdfrw2/

import sys
from pdfrw import PdfReader, PdfWriter, PageMerge
    
args = sys.argv
if len(args) > 2:
    try: 
        base_file, overlay_file = args[1:3]
        if len(args) == 4:
            output_file = args[3]
        else:
            output_file = 'output.pdf'
        base_pages = PdfReader(base_file).pages
        overlay_pages = PdfReader(overlay_file).pages
    except:
        print('Needs 2 PDF files as input arguments. Output filename is optional.')
        exit()
    writer = PdfWriter(output_file)    
    for i, page in enumerate(base_pages):
        overlay = overlay_pages[i % len(overlay_pages)]
        new_page = PageMerge() + page + overlay
        writer.addpage(new_page.render())
    writer.write()
else:
    print(
        'Usage:\n'
        '<base file a> <overlay file b> [<output file>]\n'
        'Note: If the overlay file is shorter, its pages will be used repeatedly'
        )
        

overlay_pdfs_hardcoded.py

#!/usr/bin/env python

# Requires pdfrw2 - https://pypi.org/project/pdfrw2/

import sys
from pdfrw import PdfReader, PdfWriter, PageMerge
# instalar pdfrw2 via pip ou no Thonny Tools > Manage packages

try: 
    base_file = 'exemplo-10.pdf'
    overlay_file = 'overlay.pdf'
    output_file = 'output.pdf'
    base_pages = PdfReader(base_file).pages
    overlay_pages = PdfReader(overlay_file).pages
except Exception as e:
    print(e)
    exit()
writer = PdfWriter(output_file)    
for i, page in enumerate(base_pages):
    overlay = overlay_pages[i % len(overlay_pages)]
    new_page = PageMerge() + page + overlay
    writer.addpage(new_page.render())
writer.write()