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# Description The polars dtype command is largerly redundant since the introduction of the schema command. The schema command also has the added benefit that it's output can be used as a parameter to other schema commands: ```nushell [[a b]; [5 6] [5 7]] | polars into-df -s ($df | polars schema ``` # User-Facing Changes `polars dtypes` has been removed. Users should use `polars schema` instead. Co-authored-by: Jack Wright <jack.wright@disqo.com>
Nushell core libraries and plugins
These sub-crates form both the foundation for Nu and a set of plugins which extend Nu with additional functionality.
Foundational libraries are split into two kinds of crates:
- Core crates - those crates that work together to build the Nushell language engine
- Support crates - a set of crates that support the engine with additional features like JSON support, ANSI support, and more.
Plugins are likewise also split into two types:
- Core plugins - plugins that provide part of the default experience of Nu, including access to the system properties, processes, and web-connectivity features.
- Extra plugins - these plugins run a wide range of different capabilities like working with different file types, charting, viewing binary data, and more.