Fpdf2

https://github.com/py-pdf/fpdf2 

import glob

from fpdf import FPDF

for local_file in glob.glob("puzzle_day_*_part_*.txt"):

    pdf = FPDF()

    pdf.add_page()

    pdf.set_font("helvetica", size=12)

    with open(local_file, "r") as f:

        for line in f:

            pdf.multi_cell(0, 10, line)

    pdf.output(local_file.replace(".txt", ".pdf"))