[WIP} Fix type annotation in pandas/core/api

[vaibhavhrt]

• closes Fix Type Annotation in pandas/core/api.py #26148
• tests passed
• passes git diff upstream/master -u -- "*.py" | flake8 --diff
• whatsnew entry

[vaibhavhrt]

@WillAyd please take a look. Mypy is showing a lot of errors in setup.py and one in pandas\core\computation\expr.py when running locally, not sure why.

[WillAyd]

Thanks! Some minor issues as commented. Didn’t see the Mypy issue you mentioned above so maybe not an issue

[codecov]

Codecov Report

Merging #26341 into master will decrease coverage by 51.33%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##           master   #26341       +/-   ##
===========================================
- Coverage   92.04%   40.71%   -51.34%     
===========================================
  Files         175      175               
  Lines       52292    52290        -2     
===========================================
- Hits        48133    21289    -26844     
- Misses       4159    31001    +26842

Flag	Coverage Δ
#multiple	?
#single	40.71% <100%> (-0.15%)	⬇️

Impacted Files	Coverage Δ
pandas/core/arrays/integer.py	44% <100%> (-52.36%)	⬇️
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%)	⬇️
pandas/io/sas/sas_xport.py	0% <0%> (-90.1%)	⬇️
pandas/core/tools/numeric.py	10.44% <0%> (-89.56%)	⬇️
... and 131 more

---

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[codecov]

Codecov Report

Merging #26341 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master   #26341      +/-   ##
==========================================
- Coverage   92.04%   92.03%   -0.01%     
==========================================
  Files         175      175              
  Lines       52292    52290       -2     
==========================================
- Hits        48133    48126       -7     
- Misses       4159     4164       +5

Flag	Coverage Δ
#multiple	90.59% <100%> (-0.01%)	⬇️
#single	40.71% <100%> (-0.15%)	⬇️

Impacted Files	Coverage Δ
pandas/core/arrays/integer.py	96.33% <100%> (-0.03%)	⬇️
pandas/io/gbq.py	78.94% <0%> (-10.53%)	⬇️
pandas/core/frame.py	97.01% <0%> (-0.12%)	⬇️
pandas/util/testing.py	90.6% <0%> (-0.11%)	⬇️

---

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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[vaibhavhrt]

@WillAyd I have addressed all the issues and tests should pass now(except the one that's failing on build stage). But codecov says coverage decreasing by 51%, do I need to write some tests too?

[jreback]

this is fine. waiting on the resolution of the CI, then will have you rebase.

[jreback]

thanks @vaibhavhrt

[vaibhavhrt]

Part of #25882, One more item in todo list of that issue can be marked completed.