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🎯 czv includes Rust, Python, & WebAssembly (JavaScript/TypeScript) libraries for CSV data engineering and analysis operations written in Rust. 💻 cargo/pip install czv or npm install czv-wasm

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czv

czv includes libraries for Rust, Python, and WebAssembly (JavaScript and TypeScript) providing CSV-related operations for data engineering and analysis tasks.

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Installation and examples

In the following examples we'll get the total number of rows in the CSV data including the header row.

Rust

cargo install czv
use czv::{RowCount, Result};

fn main() -> Result<()> {
    let data: &str = "\
fruits,price
apple,2.50
banana,3.00
strawberry,1.50
";
    let output: usize = RowCount::new()
        .file_data(data)
        .include_header_row(true)
        .execute()?;
    println!("{output}"); // 4
    Ok(())
}

JavaScript/TypeScript (WebAssembly)

bun install czv-wasm

Or use npm, pnpm, or yarn instead of bun.

The following example is written in TypeScript:

import init, * as czv from "czv-wasm";
// Must run `await init()` or `initSync()` first for web use
await init();

const data = `fruits,price
apple,2.50
banana,3.00
strawberry,1.50`;

const output: number = czv.rowCount({
    file_data: data,
    include_header_row: true,
});

console.log(output);

You can view source code for an example website using czv-wasm at https://github.com/rzmk/czv/tree/main/czv-wasm/examples/web-demo.

Python

pip install czv

Or use uv pip instead of pip.

import czv

data: str = """fruits,price
apple,2.50
banana,3.00
strawberry,1.50"""

output: int = czv.row_count(file_data=data, include_header_row=True)

print(output) # 4

Available operations

czv (Rust) czv-wasm (JS/TS) czv-python Summary
RowCount rowCount row_count Get the number of rows
ColumnCount columnCount column_count Get the number of columns

Development

Each package has its own README.md with more info for that particular package.

You may generate docs with:

cargo doc --no-deps --workspace --open

Notes

czv is inspired by the command-line tools xsv and qsv, but czv is not intended to cover all of their commands.

Not all provided libraries may be in sync at a given time. See the available operations table for a common operation list between libraries (not all implementations for a given operation may be in sync either, for example they may not have the same builder/function arguments).

Here are a few expected features for each provided operation:

  • czv (Rust)
    • Provide both a builder (recommended and common for conditional parameters) and a function
    • Provide documentation (docstrings) in Markdown format
  • czv-wasm (Web, JavaScript and TypeScript)
    • Use camelCase for exported functions
    • Include common browser support to run in-browser
    • Provide documentation (dosctrings) in TSDoc format
  • czv-python
    • Provide documentation (docstrings) and type hints for IDEs when developers are using the Python library (sourced from czv-python/czv.pyi) in Markdown format

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🎯 czv includes Rust, Python, & WebAssembly (JavaScript/TypeScript) libraries for CSV data engineering and analysis operations written in Rust. 💻 cargo/pip install czv or npm install czv-wasm

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