cypherlite 2.0.1

Lightweight embedded graph database with Cypher query support

CypherLite

SQLite-like simplicity for graph databases.

CypherLite is a lightweight, embedded, single-file graph database engine written in Rust with Python bindings via PyO3. Zero-config, ACID-compliant, with native Cypher query support.

Installation

pip install cypherlite

Pre-built wheels are available for:

• Linux (x86_64, aarch64)
• macOS (x86_64, arm64)
• Windows (x86_64)

Quick Start

import cypherlite

# Open (or create) a database
db = cypherlite.open("my_graph.cyl")

# Create nodes and relationships
db.execute("CREATE (a:Person {name: 'Alice', age: 30})")
db.execute("CREATE (b:Person {name: 'Bob', age: 25})")
db.execute("""
    MATCH (a:Person {name: 'Alice'}), (b:Person {name: 'Bob'})
    CREATE (a)-[:KNOWS {since: 2024}]->(b)
""")

# Query the graph
result = db.execute("MATCH (p:Person) RETURN p.name, p.age ORDER BY p.age")
for row in result:
    print(f"{row['p.name']}: {row['p.age']}")

# Parameterized queries
result = db.execute(
    "MATCH (p:Person) WHERE p.name = $name RETURN p.age",
    params={"name": "Alice"}
)

# Transactions
tx = db.begin()
tx.execute("CREATE (c:Person {name: 'Charlie', age: 35})")
tx.commit()

db.close()

Features

• ACID Transactions with Write-Ahead Logging
• Cypher Queries: CREATE, MATCH, SET, DELETE, MERGE, WITH, ORDER BY, LIMIT
• Temporal Queries: AT TIME, BETWEEN TIME for point-in-time lookups
• Subgraph Snapshots: CREATE SNAPSHOT for graph state capture
• Hyperedges: Native N:M relationship support
• Plugin System: Custom scalar functions, triggers, serializers
• Single-file Database: Zero configuration, embedded in your application

Links

• Documentation
• GitHub Repository
• Rust API (docs.rs)
• Changelog

License

MIT OR Apache-2.0