Python 3 modernization: low-hanging fruit cleanup
- hashlib: add usedforsecurity=False to all md5/sha1/sha256/sha512 calls
(FIPS-mode compatibility, ~34 call sites across 13 files)
- join([listcomp]): convert to generator expressions (~15 sites)
- class Foo(object): -> class Foo: across all files (Python 3 style)
- collections.OrderedDict() -> {} in db/skel.py (Python 3.7+ dicts ordered)
- open() without context manager: fix 3 bare open/close in misc.py
- Exception chaining: add 'from err' to raise statements in portage_plugin
- const_is_python3() dead code removal:
* Simplify 7 compat functions in const.py (const_is_python3,
const_get_stringtype, const_isunicode, const_israwstring,
const_get_buffer, const_convert_to_unicode, const_convert_to_rawstring,
const_isstring, const_get_int) — remove Python 2 branches
* Remove 100+ const_is_python3() if/else branches across 27 files,
keeping only the Python 3 path
* Remove cPickle import in dump.py, use plain pickle with fix_imports=True
* Remove urllib2 dead imports in misc.py, fetchers.py
* Clean up const_is_python3 from all import lines
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
7072c00a77