Fixed code breakage for return_type = tuples for axis = 0

[rajat315315]

• closes BUG: Pandas 1.0.5 → 1.1.0 behavior change on DataFrame.apply() where func returns tuple #35518
• tests added / passed
• Ensure all linting tests pass, see here for how to run them
• whatsnew entry

[pep8speaks]

Hello @rajat315315! Thanks for updating this PR. We checked the lines you've touched for PEP 8 issues, and found:

There are currently no PEP 8 issues detected in this Pull Request. Cheers! 🍻

Comment last updated at 2021-01-25 06:30:45 UTC

[MarcoGorelli]

Are we sure this is the correct solution? Because in #35518 (comment) it was mentioned that even for list then we should get a Series of lists, while with the current changes we have

In [7]: pd.DataFrame([['orig1', 'orig2']]).apply(func=lambda col: ['new1', 'new2'])
Out[7]: 
      0     1
0  new1  new1
1  new2  new2

instead of

0    [new1, new2]
1    [new1, new2]
dtype: object

[github-actions]

This pull request is stale because it has been open for thirty days with no activity. Please update or respond to this comment if you're still interested in working on this.

[MarcoGorelli]

closing as stale (+ I don't think this is the solution)