Hi, I first want to thank everyone in the community for the contributions over the years. I know the idea of a frozendict has been proposed before and rejected. I have a use case for a frozendict implementation that to my knowledge was not discussed during previous debates. My reasoning for a frozendict class stems from patterns I typically see arise when performing ETL or data integrations and conversions. I generally have used MappingProxyType as a way to set default mapping to a function or to set an empty mapping to a function. I've created a gist with an example use case: https://gist.github.com/pmart123/493edf84d9aa61691ca7321325ebb6ab I've included an example of what code typically looks like when using MappingProxyType and what it could look like with a frozendict implementation. I believe this use case may also be under-reported in open source code as it often crops up when integrating third-party data sources, which at times can't be open sourced due to licensing issues. I would love to hear if anyone has used MappingProxyType in a similar manner, or if this use case could help warrant a frozendict in the standard library.
participants (15)
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Anders Hovmöller
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Cameron Simpson
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Chris Angelico
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Chris Barker
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Chris Barker - NOAA Federal
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George Leslie-Waksman
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Greg Ewing
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Jonathan Fine
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João Santos
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Michael Selik
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Philip Martin
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Serhiy Storchaka
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Steven D'Aprano
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Sven R. Kunze
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Zaur Shibzukhov