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@MarcoGorelli MarcoGorelli commented Feb 19, 2025

One possible fix for #60962

This could go through a deprecation warning, although anyone currently passing dtype to MultiIndex is already having their code (silently) not behave as intended. Keeping the parameter but raising an error wouldn't be any less breaking that removing the argument. Happy to take a different strategy if people prefer though

@WillAyd
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WillAyd commented Feb 19, 2025

If no end user has ever complained about this I would be OK with removing as well. Can always add back at a later date if the need arises

@MarcoGorelli MarcoGorelli marked this pull request as ready for review February 19, 2025 23:55
@mroeschke mroeschke added this to the 3.0 milestone Feb 20, 2025
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Yeah I'm fine with this.

@mroeschke mroeschke merged commit ddcec67 into pandas-dev:main Feb 20, 2025
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Thanks @MarcoGorelli

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BUG: dtype silently ignored in MultiIndex constructor

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