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The `--name` flag of `polars with-column` only works when used with an eager dataframe. I will not work with lazy dataframes and it will not work when used with expressions (which forces a conversion to a lazyframe). This pull request adds better documentation to the flags and errors messages when used in cases where it will not work.
Dataframe
This dataframe directory holds all of the definitions of the dataframe data structures and commands.
There are three sections of commands:
For more details see the Nushell book section on dataframes