lint & format weights/*.py part 8

[jGaboardi]

This PR:

• formats and lints weights/*.py – and should be part 8 of 8
• nearly completes the linting of libpysal -> there seem to be some loose ends in cg that I will take care of in a follow PR.

[codecov]

Codecov Report

Merging #658 (5d3b46d) into main (cf6b05e) will decrease coverage by 0.0%.
The diff coverage is 100.0%.

Additional details and impacted files

@@           Coverage Diff           @@
##            main    #658     +/-   ##
=======================================
- Coverage   84.7%   84.7%   -0.0%     
=======================================
  Files        139     139             
  Lines      14859   14858      -1     
=======================================
- Hits       12591   12590      -1     
  Misses      2268    2268             

Files	Coverage Δ
libpysal/weights/tests/test_Wsets.py	100.0% <100.0%> (ø)
libpysal/weights/tests/test_user.py	100.0% <100.0%> (ø)
libpysal/weights/tests/test_util.py	100.0% <100.0%> (ø)
libpysal/weights/tests/test_weights.py	100.0% <100.0%> (ø)
libpysal/weights/tests/test_weights_IO.py	100.0% <ø> (ø)
libpysal/weights/weights.py	93.5% <100.0%> (ø)