821 series diff timestamp2

[mutricyl]

• Closes Series[Timestamp].diff() should return Series[Timedelta] #821

• Tests added: Please use assert_type() to assert the type of any return value

• check function updated for series.diff particular usage

• it looks like only first assert_never is actually checked so I created several test functions

[Dr-Irv]

You'll need to merge with main so that the tests will run. Some small things I picked up.

[Dr-Irv]

@mutricyl I'm fine with all of your changes, but the CI is failing on MacOS. It has something to do with tables.

Can you try updating pyproject.toml to refer to tables version 3.9.2 to see if that will fix the problem?

[mutricyl]

tables 3.9.2 does not solve the issue apparently

[Dr-Irv]

tables 3.9.2 does not solve the issue apparently

Ugh. We'll have to triage that against previous PR's that were working fine.

@twoertwein any ideas here? MacOS CI is failing because it can't build tables. I'm guessing this might be an architecture problem. Maybe we should lock MacOS to x86?

[Dr-Irv]

tables 3.9.2 does not solve the issue apparently

Ugh. We'll have to triage that against previous PR's that were working fine.

@twoertwein any ideas here? MacOS CI is failing because it can't build tables. I'm guessing this might be an architecture problem. Maybe we should lock MacOS to x86?

I fixed the issue - changed macos-latest to macos-13 and it worked.

@mutricyl can you merge with the latest main and push ?

[mutricyl]

@Dr-Irv , I'am done

[Dr-Irv]

thanks @mutricyl