Deprecated Series.ftype, Series.ftypes and DataFrame.ftypes features

[thiviyanT]

Deprecation of Series.ftype, Series.ftypes and DataFrame.ftypes
closes #26705

• Updated the docstrings for the sphinx documentation
• Updated the unit tests for testing deprecation warnings

[thiviyanT]

@jreback @jorisvandenbossche - Any idea why these builds are failing?

[codecov]

Codecov Report

Merging #26744 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master   #26744      +/-   ##
==========================================
- Coverage   91.78%   91.77%   -0.01%     
==========================================
  Files         174      174              
  Lines       50706    50709       +3     
==========================================
- Hits        46541    46540       -1     
- Misses       4165     4169       +4

Flag	Coverage Δ
#multiple	90.37% <100%> (ø)	⬆️
#single	41.81% <0%> (-0.09%)	⬇️

Impacted Files	Coverage Δ
pandas/core/series.py	93.62% <100%> (+0.01%)	⬆️
pandas/core/generic.py	93.64% <100%> (ø)	⬆️
pandas/io/gbq.py	78.94% <0%> (-10.53%)	⬇️
pandas/core/frame.py	96.88% <0%> (-0.12%)	⬇️

---

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[codecov]

Codecov Report

Merging #26744 into master will decrease coverage by 1.47%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master   #26744      +/-   ##
==========================================
- Coverage   91.78%   90.31%   -1.48%     
==========================================
  Files         174      178       +4     
  Lines       50706    50774      +68     
==========================================
- Hits        46541    45854     -687     
- Misses       4165     4920     +755

Flag	Coverage Δ
#multiple	90.31% <100%> (-0.07%)	⬇️
#single	?

Impacted Files	Coverage Δ
pandas/core/series.py	93.64% <100%> (+0.02%)	⬆️
pandas/core/generic.py	93.91% <100%> (+0.27%)	⬆️
pandas/tseries/converter.py	0% <0%> (-100%)	⬇️
pandas/core/computation/pytables.py	62.5% <0%> (-27.75%)	⬇️
pandas/io/pytables.py	63.82% <0%> (-26.48%)	⬇️
pandas/io/gbq.py	78.94% <0%> (-10.53%)	⬇️
pandas/core/computation/common.py	84.21% <0%> (-5.27%)	⬇️
pandas/core/config_init.py	92.91% <0%> (-3.94%)	⬇️
pandas/core/computation/expr.py	94.5% <0%> (-3.03%)	⬇️
pandas/io/clipboard/clipboards.py	31.88% <0%> (-2.9%)	⬇️
... and 29 more

---

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[jreback]

looks fine, pls add a note in the whatsnew Deprecation section.

[jorisvandenbossche]

@ThiviyanThanapalasingam thanks for the PR!
I added a bunch of small suggestions (just some wording to be more explicit), normally you should be able to accept those suggestions through the github UI.

Looks good for the rest!

[thiviyanT]

Great! Appreciate the feedback.

[jreback]

thanks @ThiviyanThanapalasingam