README.md

py-d2

An unofficial, fully typed python interface for building .d2 diagram files in python.

Installation

pip install py-d2

Usage

from py_d2 import D2Diagram, D2Shape, D2Connection, D2Style

shapes = [
    D2Shape(name="shape_name1", style=D2Style(fill="red")),
    D2Shape(name="shape_name2", style=D2Style(fill="blue"))]
connections = [
    D2Connection(shape_1="shape_name1", shape_2="shape_name2")
]

diagram = D2Diagram(shapes=shapes, connections=connections)

with open("graph.d2", "w", encoding="utf-8") as f:
    f.write(str(diagram))

produces the following graph.d2 file:

shape_name1: {
  style: {
    fill: red
  }
}
shape_name2: {
  style: {
    fill: blue
  }
}
shape_name1 -> shape_name2

This can be rendered using d2 graph.d2 graph.svg && open graph.svg or https://play.d2lang.com/ to produce

See the tests for more detailed usage examples.

Supported Features

• Shapes (nodes)
• Connections (links)
• Styles
• Containers (nodes/links in nodes)
• Shapes in shapes
• Arrow directions
• Markdown / block strings / code in shapes
• Icons in shapes
• Support for empty labels
• SQL table shapes
• Class shapes
• Comments

Development

Prerequisite

• Python 3.7+
• Poetry 1.3
• pre-commit

Installation

following the steps below to setup the project:

```bash
# Clone the repository
git clone git@github.com:MrBlenny/py-d2.git && cd py-d2

# Install all dependencies
poetry install --sync --all-extras --with dev,test,coverage

# install git hook scripts for development
pre-commit install

# Install dependencies with group 'dev'、'test' for development
poetry install --with dev,test
# Only install required dependencies for production
poetry install

Usage

There are some useful commands for development:

# Run the example
poetry run example

# Debug with ipdb3
poetry run ipdb3 ./src/py_d2/main.py

# Code test
poetry run pytest -s

# Run default coverage test
poetry run tox

# Run example project coverage test at python 3.9 and 3.10
poetry run tox -e py{39,310}-py-d2

# Lint with black
poetry run black ./src --check

# Format code with black
poetry run black ./src

# Check with mypy
poetry run mypy ./src

# Check import order with isort
poetry run isort ./src --check

# Lint with flake8
poetry run flake8 ./src