forked from extern/nushell
69 lines
2.0 KiB
Rust
69 lines
2.0 KiB
Rust
use crate::dataframe::values::{NuExpression, NuLazyFrame};
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use nu_engine::CallExt;
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use nu_protocol::{
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ast::Call,
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engine::{Command, EngineState, Stack},
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Category, Example, PipelineData, ShellError, Signature, SyntaxShape, Type, Value,
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};
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#[derive(Clone)]
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pub struct LazyFillNA;
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impl Command for LazyFillNA {
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fn name(&self) -> &str {
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"fill-na"
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}
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fn usage(&self) -> &str {
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"Replaces NA values with the given expression"
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}
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fn signature(&self) -> Signature {
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Signature::build(self.name())
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.required(
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"fill",
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SyntaxShape::Any,
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"Expression to use to fill the NAN values",
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)
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.input_type(Type::Custom("dataframe".into()))
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.output_type(Type::Custom("dataframe".into()))
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.category(Category::Custom("lazyframe".into()))
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}
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fn examples(&self) -> Vec<Example> {
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vec![Example {
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description: "",
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example: "",
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result: None,
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}]
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}
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fn run(
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&self,
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engine_state: &EngineState,
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stack: &mut Stack,
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call: &Call,
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input: PipelineData,
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) -> Result<PipelineData, ShellError> {
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let fill: Value = call.req(engine_state, stack, 0)?;
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let value = input.into_value(call.head);
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if NuExpression::can_downcast(&value) {
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let expr = NuExpression::try_from_value(value)?;
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let fill = NuExpression::try_from_value(fill)?.into_polars();
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let expr: NuExpression = expr.into_polars().fill_nan(fill).into();
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Ok(PipelineData::Value(
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NuExpression::into_value(expr, call.head),
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None,
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))
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} else {
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let lazy = NuLazyFrame::try_from_value(value)?;
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let expr = NuExpression::try_from_value(fill)?.into_polars();
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let lazy = NuLazyFrame::new(lazy.from_eager, lazy.into_polars().fill_nan(expr));
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Ok(PipelineData::Value(lazy.into_value(call.head)?, None))
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}
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}
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}
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