delete.page() function bad page number(s) error

[kahvecci]

where am I doing wrong?

import fitz
import tkinter as tk
from tkinter import filedialog
import os
import shutil

root = tk.Tk()
root.withdraw()

main_path = filedialog.askdirectory(title="Pdf'lerin bulundugu klasoru seciniz.")
dst_path = filedialog.askdirectory(title="Taşınacak klasör")

pdfs = []

for doc in os.listdir(main_path):
    if doc.endswith(".pdf"):
        pdfs.append(os.path.join(main_path, doc))

for p in pdfs:
    doc = fitz.Document(p)
    new_path = os.path.join(dst_path, os.path.basename(p))
    d_pages = []
    for i in range(len(doc)):

        text = doc[i].get_text()
        print(i)
        if not "Ruhsat No:408-MRK" in text:
            d_pages.append(i)
    print(d_pages)
    for d in d_pages:
        doc.delete_page(d+1)
        

    doc.save(new_path)
    doc.close()
            

output:

0
1
2
3
4
[0, 1, 2, 3]
Traceback (most recent call last):
  File "c:\Users\user\Desktop\istakademisonuc\alab dısışndakileri sil.py", line 31, in <module>
    doc.delete_page(d+1)
  File "C:\Users\user\AppData\Local\Programs\Python\Python311\Lib\site-packages\fitz\fitz.py", line 5404, in delete_page
    raise ValueError("bad page number(s)")
ValueError: bad page number(s)

[JorjMcKie]

When you delete a page, then pages coming after it are renumbered of course. The number is not a fixed property of a page, but like an index in a list.
After deleting 0 from the Python list [0, 1, 2, 3, 4, 5], 1 will be found at index 0 and you cannot delete it using index 1.
In order to delete pages by numbers contained in a list, make sure to sort that list and then start with deleting in reversed order: larger page numbers first.

[kahvecci]

I guessed the problem, but it didn't occur to me that I could delete the pages in reverse. Thank you

[JorjMcKie]

BTW I once invested some thought in that topic and made a doc.delete_pages(). You can directly use your list as an argument, and the method will take care of the rest.