https://github.com/MaT1g3R/option

Rust like Option and Result types in Python
https://github.com/MaT1g3R/option

mypy option-type optional pep484 result result-type typing

Last synced: about 2 months ago
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Rust like Option and Result types in Python

• Host: GitHub
• URL: https://github.com/MaT1g3R/option
• Owner: MaT1g3R
• License: mit
• Created: 2018-09-10T19:58:10.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2024-01-01T17:03:27.000Z (12 months ago)
• Last Synced: 2024-10-01T15:07:25.892Z (3 months ago)
• Topics: mypy, option-type, optional, pep484, result, result-type, typing
• Language: Python
• Homepage: https://mat1g3r.github.io/option/
• Size: 788 KB
• Stars: 83
• Watchers: 1
• Forks: 5
• Open Issues: 8
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-python-typing - option - Rust like Option and Result types. (Additional types)

README

        
# Option

[![CircleCI](https://circleci.com/gh/MaT1g3R/option/tree/master.svg?style=svg)](https://circleci.com/gh/MaT1g3R/option/tree/master)

Rust-like [Option](https://doc.rust-lang.org/std/option/enum.Option.html) and [Result](https://doc.rust-lang.org/std/result/enum.Result.html) types in Python, slotted and fully typed.

An `Option` type represents an optional value, every `Option` is either `Some` and contains Some value, or `NONE`

A `Result` type represents a value that might be an error. Every `Result` is either `Ok` and contains a success value, or `Err` and contains an error value.

Using an `Option` type forces you to deal with `None` values in your code and increase type safety.

Using a `Result` type simplifies error handling and reduces `try` `except` blocks.

## Quick Start

```Python

from option import Result, Option, Ok, Err

from requests import get

def call_api(url, params) -> Result[dict, int]:

    result = get(url, params)

    code = result.status_code

    if code == 200:

        return Ok(result.json())

    return Err(code)

def calculate(url, params) -> Option[int]:

    return call_api(url, params).ok().map(len)

dict_len = calculate('https://example.com', {})

```

## Install

Option can be installed from PyPi:

```bash

pip install option

```

## Documentation

The documentation lives at https://mat1g3r.github.io/option/

## License

MIT