CLN: PY3 compat signature

[mroeschke]

• xref CLN: remove PY2 #25725
• tests passed
• passes git diff upstream/master -u -- "*.py" | flake8 --diff

Replace compat.signature for inspect.getfullargspec

[codecov]

Codecov Report

Merging #26016 into master will decrease coverage by 51.09%.
The diff coverage is 25%.

@@            Coverage Diff             @@
##           master   #26016      +/-   ##
==========================================
- Coverage   91.82%   40.72%   -51.1%     
==========================================
  Files         175      175              
  Lines       52551    52536      -15     
==========================================
- Hits        48256    21397   -26859     
- Misses       4295    31139   +26844

Flag	Coverage Δ
#multiple	?
#single	40.72% <25%> (-0.13%)	⬇️

Impacted Files	Coverage Δ
pandas/compat/__init__.py	65.09% <ø> (-10.74%)	⬇️
pandas/util/_decorators.py	69.23% <0%> (-22.2%)	⬇️
pandas/core/apply.py	50.92% <50%> (-47.69%)	⬇️
pandas/io/formats/latex.py	0% <0%> (-100%)	⬇️
pandas/io/sas/sas_constants.py	0% <0%> (-100%)	⬇️
pandas/core/groupby/categorical.py	0% <0%> (-100%)	⬇️
pandas/tseries/plotting.py	0% <0%> (-100%)	⬇️
pandas/tseries/converter.py	0% <0%> (-100%)	⬇️
pandas/io/formats/html.py	0% <0%> (-99.37%)	⬇️
pandas/io/sas/sas7bdat.py	0% <0%> (-91.16%)	⬇️
... and 133 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a1fee91...60aca53. Read the comment docs.

[codecov]

Codecov Report

Merging #26016 into master will decrease coverage by <.01%.
The diff coverage is 80%.

@@            Coverage Diff             @@
##           master   #26016      +/-   ##
==========================================
- Coverage   91.82%   91.82%   -0.01%     
==========================================
  Files         175      175              
  Lines       52551    52536      -15     
==========================================
- Hits        48256    48239      -17     
- Misses       4295     4297       +2

Flag	Coverage Δ
#multiple	90.38% <80%> (ø)	⬆️
#single	40.72% <20%> (-0.13%)	⬇️

Impacted Files	Coverage Δ
pandas/compat/__init__.py	74.52% <ø> (-1.31%)	⬇️
pandas/core/apply.py	98.61% <100%> (ø)	⬆️
pandas/util/_decorators.py	91.34% <66.66%> (-0.09%)	⬇️
pandas/io/gbq.py	75% <0%> (-12.5%)	⬇️
pandas/core/frame.py	96.79% <0%> (-0.12%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a1fee91...49749f8. Read the comment docs.

[jreback]

thanks @mroeschke