Metadata-Version: 2.1
Name: quickchart.io
Version: 0.1.4
Summary: A client for quickchart.io, a service that generates static chart images
Home-page: https://quickchart.io/
License: MIT
Keywords: chart api,chart image,charts
Author: Ian Webster
Author-email: ianw_pypi@ianww.com
Maintainer: Ian Webster
Maintainer-email: ianw_pypi@ianww.com
Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*
Classifier: License :: OSI Approved :: MIT License
Classifier: Programming Language :: Python :: 2
Classifier: Programming Language :: Python :: 2.7
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.5
Classifier: Programming Language :: Python :: 3.6
Classifier: Programming Language :: Python :: 3.7
Classifier: Programming Language :: Python :: 3.8
Requires-Dist: requests (>=2.23.0,<3.0.0)
Project-URL: Repository, https://github.com/typpo/quickchart-python
Description-Content-Type: text/markdown

# quickchart-python
[![Build Status](https://travis-ci.com/typpo/quickchart-python.svg?branch=master)](https://travis-ci.com/typpo/quickchart-python)
![PyPI](https://img.shields.io/pypi/v/quickchart.io)
![PyPI - License](https://img.shields.io/pypi/l/quickchart.io)

A Python client for the [quickchart.io](https://quickchart.io/) image charts web service.

# Installation

Use the `quickchart.py` library in this project, or install through [pip](https://pypi.org/project/quickchart.io/):

```
pip install quickchart.io
```

# Usage

This library provides a `QuickChart` class.  Import and instantiate it.  Then set properties on it and specify a [Chart.js](https://chartjs.org) config:

```python
from quickchart import QuickChart

qc = QuickChart()
qc.width = 500
qc.height = 300
qc.device_pixel_ratio = 2.0
qc.config = {
    "type": "bar",
    "data": {
        "labels": ["Hello world", "Test"],
        "datasets": [{
            "label": "Foo",
            "data": [1, 2]
        }]
    }
}
```

Use `get_url()` on your quickchart object to get the encoded URL that renders your chart:

```python
print(qc.get_url())
# https://quickchart.io/chart?c=%7B%22chart%22%3A+%7B%22type%22%3A+%22bar%22%2C+%22data%22%3A+%7B%22labels%22%3A+%5B%22Hello+world%22%2C+%22Test%22%5D%2C+%22datasets%22%3A+%5B%7B%22label%22%3A+%22Foo%22%2C+%22data%22%3A+%5B1%2C+2%5D%7D%5D%7D%7D%7D&w=600&h=300&bkg=%23ffffff&devicePixelRatio=2.0&f=png
```

If you have a long or complicated chart, use `get_short_url()` to get a fixed-length URL using the quickchart.io web service (note that these URLs only persist for a short time unless you have a subscription):

```python
print(qc.get_short_url())
# https://quickchart.io/chart/render/f-a1d3e804-dfea-442c-88b0-9801b9808401
```

The URLs will render an image of a chart:

<img src="https://quickchart.io/chart?c=%7B%22type%22%3A+%22bar%22%2C+%22data%22%3A+%7B%22labels%22%3A+%5B%22Hello+world%22%2C+%22Test%22%5D%2C+%22datasets%22%3A+%5B%7B%22label%22%3A+%22Foo%22%2C+%22data%22%3A+%5B1%2C+2%5D%7D%5D%7D%7D&w=600&h=300&bkg=%23ffffff&devicePixelRatio=2.0&f=png" width="500" />

## Customizing your chart

You can set the following properties:

### config: dict or str
The actual Chart.js chart configuration.

### width: int
Width of the chart image in pixels.  Defaults to 500

### height: int
Height of the chart image  in pixels.  Defaults to 300

### format: str
Format of the chart. Defaults to png. svg is also valid.

### background_color: str
The background color of the chart. Any valid HTML color works. Defaults to #ffffff (white). Also takes rgb, rgba, and hsl values.

### device_pixel_ratio: float
The device pixel ratio of the chart. This will multiply the number of pixels by the value. This is usually used for retina displays. Defaults to 1.0.

## Getting URLs

There are two ways to get a URL for your chart object.

### get_url(): str

Returns a URL that will display the chart image when loaded.

### get_short_url(): str

Uses the quickchart.io web service to create a fixed-length chart URL that displays the chart image.  Returns a URL such as `https://quickchart.io/chart/render/f-a1d3e804-dfea-442c-88b0-9801b9808401`.

Note that short URLs expire after a few days for users of the free service.  You can [subscribe](https://quickchart.io/pricing/) to keep them around longer.

## Other functionality

### get_bytes()

Returns the bytes representing the chart image.

### to_file(path: str)

Writes the chart image to a file path.

## More examples

Checkout the `examples` directory to see other usage.

