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// SPDX-License-Identifier: MIT OR Apache-2.0
//
// Copyright 2022-2025, John McNamara, jmcnamara@cpan.org
//! An example of writing a Polar Rust dataframe to an Excel file. This
//! demonstrates setting properties of the worksheet table that wraps the output
//! dataframe.
use polars::prelude::*;
use polars_excel_writer::PolarsExcelWriter;
use rust_xlsxwriter::{Table, TableStyle};
fn main() -> PolarsResult<()> {
// Create a sample dataframe for the example.
let df: DataFrame = df!(
"String" => &["North", "South", "East", "West"],
"Int" => &[1, 2, 3, 4],
"Float" => &[1.0, 2.22, 3.333, 4.4444],
)?;
// Create a new excel writer.
let mut excel_writer = PolarsExcelWriter::new();
// Add a `rust_xlsxwriter` table and set the style.
let table = Table::new().set_style(TableStyle::Medium4);
// Add the table to the Excel writer.
excel_writer.set_table(&table);
// Write the dataframe to Excel.
excel_writer.write_dataframe(&df)?;
// Save the file to disk.
excel_writer.save("dataframe.xlsx")?;
Ok(())
}