Update table of contents and metadata of PDF with pymupdf

script.py

import pymupdf
 
doc = pymupdf.open("book.pdf")
#metadata = doc.metadata
#new_metadata = {"title": "New Title", "author": "New Author"}
#new_metadata = metadata
#doc.set_metadata(new_metadata)

toc = doc.get_toc()
new_toc = toc
doc.set_toc(new_toc)
toc = doc.get_toc()
print(toc)
doc.save(doc.name, incremental=True, encryption=pymupdf.PDF_ENCRYPT_KEEP)
doc.close()

#https://medium.com/@pymupdf/mastering-metadata-and-table-of-contents-manipulation-with-pymupdf-b9099b64b17b