Alternative for Zotero's "Unlink citations" in Google Docs

pdf-zotero-unlink.py

#!/usr/bin/env python3
#
# Alternative for Zotero's "Unlink citations" in Google Docs.
# It just removes all Zotero-specific links.
#
# Requires pymupdf >= 1.18.0
#
import sys
import fitz

def matching_link(link):
    return link['uri'] is not None and link['uri'].startswith('https://www.zotero.org/google-docs/?')

if len(sys.argv) != 3:
    sys.stderr.write('Usage: %s <input_pdf> <output_pdf>\n' % sys.argv[0])
    sys.exit(1)

doc = fitz.open(sys.argv[1])
for page in doc:
    for link in page.links(kinds=(fitz.LINK_URI,)):
        if matching_link(link):
            page.delete_link(link)

doc.save(sys.argv[2])
doc.close()