64 lines
1.8 KiB
Rust
64 lines
1.8 KiB
Rust
use crate::{commands::dataframe::utils::parse_polars_error, prelude::*};
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use nu_engine::WholeStreamCommand;
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use nu_errors::ShellError;
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use nu_protocol::{
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dataframe::{NuSeries, PolarsData},
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Signature, SyntaxShape, UntaggedValue, Value,
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};
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use polars::prelude::IntoSeries;
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pub struct DataFrame;
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impl WholeStreamCommand for DataFrame {
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fn name(&self) -> &str {
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"dataframe is-in"
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}
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fn usage(&self) -> &str {
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"Checks if elements from a series are contained in right series"
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}
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fn signature(&self) -> Signature {
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Signature::build("dataframe is-in").required("other", SyntaxShape::Any, "right series")
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}
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fn run(&self, args: CommandArgs) -> Result<OutputStream, ShellError> {
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command(args)
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}
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fn examples(&self) -> Vec<Example> {
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vec![Example {
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description: "Checks if elements from a series are contained in right series",
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example: r#"let other = ([1 3 6] | dataframe to-series);
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[5 6 6 6 8 8 8] | dataframe to-series | dataframe is-in $other"#,
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result: None,
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}]
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}
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}
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fn command(mut args: CommandArgs) -> Result<OutputStream, ShellError> {
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let tag = args.call_info.name_tag.clone();
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let value: Value = args.req(0)?;
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let other = match value.value {
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UntaggedValue::DataFrame(PolarsData::Series(series)) => Ok(series),
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_ => Err(ShellError::labeled_error(
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"Incorrect type",
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"can only search in a series",
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value.tag.span,
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)),
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}?;
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let series = NuSeries::try_from_stream(&mut args.input, &tag.span)?;
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let res = series
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.as_ref()
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.is_in(other.as_ref())
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.map_err(|e| parse_polars_error::<&str>(&e, &tag.span, None))?;
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Ok(OutputStream::one(NuSeries::series_to_value(
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res.into_series(),
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tag,
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)))
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}
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