Document.delete_pages declines keyword arguments

[stefan6419846]

Describe the bug

When using Document.delete_pages with keyword-only arguments (as documented in Format 1), an error is reported:

Traceback (most recent call last):
  File "/home/me/path/to/file.py", line 7, in <module>
    document.delete_pages(from_page=1, to_page=document.page_count)
  File "/home/me/lib/python3.6/site-packages/fitz/fitz.py", line 5286, in delete_pages
    raise ValueError("cannot mix keyword and positional argument")
ValueError: cannot mix keyword and positional argument

Adding some debugging to the offending section, it seems like PyMuPDF assumes that *args will always be a list, but usually is a tuple:

args = ()
kw = {'from_page': 1, 'to_page': 1}

To Reproduce

import fitz

print(fitz.version)

document = fitz.Document('/home/me/path/to/document.pdf')
print(document.page_count)
document.delete_pages(from_page=1, to_page=document.page_count)
print(document.page_count)

Expected behavior

No error is raised.

Your configuration

• OpenSUSE Leap 15.3, 64 bit
• Python 3.6
• PyMuPDF 1.19.6 and 1.20.1, generated from source

[JorjMcKie]

Accepted - will be fixed in next version. Thanks for the report.

[julian-smith-artifex-com]

Fixed in 1.21.0