graphable 0.2.2

A lightweight, type-safe library for building, managing, and visualizing dependency graphs.

graphable

graphable is a lightweight, type-safe Python library for building, managing, and visualizing dependency graphs. It provides a simple API for defining nodes and their relationships, performing topological sorts, and exporting graphs to various formats like Mermaid and ASCII text trees.

Features

• Type-Safe: Built with modern Python generics and type hints.
• Topological Sorting: Easily get nodes in dependency order.
• Filtering & Tagging: Create subgraphs based on custom predicates or tags.
• Visualizations:
  • Mermaid: Generate flowchart definitions or export directly to SVG.
  • Text Tree: Generate beautiful ASCII tree representations.
• Modern Tooling: Managed with uv and just.

Installation

uv add graphable
# or
pip install graphable

Quick Start

from graphable.graph import Graph
from graphable.graphable import Graphable
from graphable.views.texttree import create_topology_tree_txt

# 1. Define your nodes
a = Graphable("Database")
b = Graphable("API Service")
c = Graphable("Web Frontend")

# 2. Build the graph
g = Graph()
g.add_edge(a, b)  # API Service depends on Database
g.add_edge(b, c)  # Web Frontend depends on API Service

# 3. Get topological order
for node in g.topological_order():
    print(node.reference)
# Output: Database, API Service, Web Frontend

# 4. Visualize as a text tree
print(create_topology_tree_txt(g))
# Output:
# Web Frontend
# └─ API Service
#    └─ Database

Visualizing with Mermaid

from graphable.views.mermaid import create_topology_mermaid_mmd

mmd = create_topology_mermaid_mmd(g)
print(mmd)
# Output:
# flowchart TD
# Database --> API Service
# API Service --> Web Frontend

Documentation

Full documentation is available in the docs/ directory. You can build it locally:

just docs-view

Development

This project uses uv for dependency management and just as a command runner.

just install    # Install dependencies
just check      # Run linting, type checking, and tests
just coverage   # Run tests with coverage report

License

This project is licensed under the MIT License - see the LICENSE file for details.