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Pandas 3.0 Prep #664

@henrydingliu

Description

@henrydingliu

Are you on the latest chainladder version?

  • Yes, this bug occurs on the latest version.

Describe the bug in words

Pandas 3.0 breaks the package.

Amongst the detected bugs so far, the most notable is latest_diagonal, which is caused by triangle.valuation and triangle.valuation_date being out of sync.

How can the bug be reproduced?

Will create branch and provide link

What is the expected behavior?

It's hard to see us moving completely out of pandas, even after adding arrow suppport.

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    Effort > Moderate 🐕Mid-sized tasks estimated to take a few days to a few weeks.Impact > Moderate 🔶User-visible but non-breaking change. Treated like a minor version bump (e.g., 0.6.5 → 0.7.0).

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