dsviper 1.2.8

Digital Substrate Viper Runtime

dsviper — Digital Substrate Viper Runtime

dsviper is the Python extension module for Viper, a C++ runtime built around metadata-driven type and value systems. It provides a seamless bidirectional bridge between Python and Viper's strong-typed data model.

Key Features

• Type & Value System — Dynamically construct types and instantiate strong-typed values with automatic Python ↔ C++ bridging.
• Commit Database — Versioned persistence with full mutation history (DAG of commits).
• Definitions — Define data models programmatically: concepts, structures, enumerations, attachments.
• Blob System — BlobArray with zero-copy NumPy integration, BlobPack for structured binary data.
• Codecs — Stream binary and JSON serialization for all Viper types.

Quick Start

from dsviper import *

# Strong-typed value system
names = Value.create(TypeVector(Type.STRING))
names.extend(["alice", "bob"])
print(names)  # ['alice', 'bob']
print(names.type())  # vector<string>

names.append(42)  # ViperError: expected 'str', got 'int'

Commit Database

A complete example — define a model, create a versioned database, commit and query:

from dsviper import *

# Define a model dynamically
defs = Definitions()
ns = NameSpace(ValueUUId.create(), "App")
t_User = defs.create_concept(ns, "User")
d_Profile = TypeStructureDescriptor("Profile")
d_Profile.add_field("name", Type.STRING)
a_profile = defs.create_attachment(ns, "profile", t_User,
                                   defs.create_structure(ns, d_Profile))

# Create a versioned database and commit data
db = CommitDatabase.create_in_memory()
db.extend_definitions(defs.const())

key = a_profile.create_key()
doc = a_profile.create_document()
doc.name = "Alice"

mutable = CommitMutableState(db.initial_state())
mutable.attachment_mutating().set(a_profile, key, doc)
db.commit_mutations("Add Alice", mutable)

# Query
state = db.state(db.last_commit_id())
state.attachment_getting().get(a_profile, key)
# Optional({name='Alice'})

Installation

pip install dsviper

Requires Python ≥ 3.10. Pre-built wheels are provided for all supported platforms.

Supported Platforms

Platform	3.10	3.11	3.12	3.13	3.14
Linux x86_64	✅	✅	✅	✅	✅
Linux aarch64	✅	✅	✅	✅	✅
macOS arm64 (Apple Silicon)	✅	✅	✅	✅	✅
macOS x86_64 (Intel)	✅	✅	✅	✅	✅
Windows x64	✅	✅	✅	✅	✅
Windows arm64	—	✅	✅	✅	✅

Documentation

Full documentation at devkit.digitalsubstrate.io

License

Proprietary — Commercial license required. Contact Digital Substrate for licensing information.