Pypdf

New Features (ENH)
- Accelerate image list keys generation (2014)
- Use `cryptography` for encryption/decryption as a fallback for PyCryptodome (2000)
- Extract LaTeX characters (2016)
- ASCIIHexDecode.decode now returns bytes instead of str (1994)

Bug Fixes (BUG)
- Add RunLengthDecode filter (2012)
- Process /Separation ColorSpace (2007)
- Handle single element ColorSpace list (2026)
- Process lookup decoded as TextStringObjects (2008)

Robustness (ROB)
- Cope with garbage collector during cloning (1841)

Maintenance (MAINT)
- Cleanup of annotations (1745)

[Full Changelog](https://github.com/py-pdf/pypdf/compare/3.13.0...3.14.0)

New Features (ENH)
- Add is_open in outlines in PdfReader and PdfWriter (1960)

Bug Fixes (BUG)
- Search /DA in hierarchy fields (2002)
- Cope with different ISO date length (1999)
- Decode Black only/CMYK deviceN images (1984)
- Process CMYK in deflate images (1977)

Developer Experience (DEV)
- Add mypy to pre-commit (2001)
- Release automation (1991, 1985)

[Full Changelog](https://github.com/py-pdf/pypdf/compare/3.12.2...3.13.0)

Bug Fixes (BUG)
- Accept calRGB and calGray color_spaces (1968)
- Process 2bits and 4bits images (1967)
- Check for AcroForm and ensure it is not None (1965)

Developer Experience (DEV)
- Automate the release process (1970)

[Full Changelog](https://github.com/py-pdf/pypdf/compare/3.12.1...3.12.2)

Bug Fixes (BUG)
- Prevent updating page contents after merging page (stamping/watermarking) (1952)
- % to be hex encoded in names (1958)
- Inverse color in CMYK images (1947)
- Dates conversion not working with Z00\'00\' (1946)
- Support UTF-16-LE Strings (1884)

[Full Changelog](https://github.com/py-pdf/pypdf/compare/3.12.0...3.12.1)

New Features (ENH)
- Add AES support for encrypting PDF files (1918, 1935, 1936, 1938)
- Add page deletion feature to PdfWriter (1843)

Bug Fixes (BUG)
- PdfReader.get_fields() attempts to delete non-existing index "/Off" (1933)
- Remove unused objects when cloning_from (1926)
- Add the TK.SIZE into the trailer (1911)
- add_named_destination() maintains named destination list sort order (1930)

[Full Changelog](https://github.com/py-pdf/pypdf/compare/3.11.1...3.12.0)

Bug Fixes (BUG)
- Cascaded filters in image objects (1913)
- Append pdf with named destination using numbers for pages (1858)
- Ignore "/B" fields only on pages in PdfWriter.append() (1875)

[Full Changelog](https://github.com/py-pdf/pypdf/compare/3.11.0...3.11.1)