xquad 0.3.1

Umbrella meta-package for the XQuad toolchain — re-exports xqffi, xqcp, xqsa under a unified namespace.

xquad — Primary user-facing package for the XQuad toolchain

xquad is the Python distribution most users should install. It provides the interactive Program / Session / RunResult API, a unified VM wrapper that dispatches to either the Rust or Python interpreter, and re-exports the lower-level peer packages (xqffi, xqcp, xqsa) under a single namespace.

Install

pip install xquad

Pulls xqffi, xqcp, xqsa, and xqvm_py as runtime dependencies. Peer installs stay valid (pip install xqffi xqcp xqsa) if you only need a subset.

Interactive usage

Load a program once, run it with different calldata, inspect outputs by slot:

from xquad.program import Program

program = Program.from_source("""
PUSH 0
INPUT r0
PUSH 1
INPUT r1
LOAD r0
LOAD r1
ADD
STOW r2
PUSH 0
OUTPUT r2
HALT
""")

session = program.session(output_slots=1)
session.set_calldata([40, 2])
result = session.run()
assert dict(result.outputs) == {0: 42}

Program.load(bytes) takes wire-format bytecode; Session.run() returns a RunResult with dict-keyed outputs (unset slots present as None), residual stack, and step count.

Full pipeline

Compile a problem via the DSL, execute, sample:

from xquad import cp, sa
from xquad.vm import VM, VMBackend

problem = cp.Problem("MyProblem")
# ... define inputs, model, objective, decoder ...
programs = problem.compile()

vm = VM(backend=VMBackend.RUST)   # or VMBackend.PYTHON for the reference interpreter
vm.set_output_slots(1)
vm.run(programs.encoder)
model = vm.outputs()[0]

sample = sa.SolverDWaveCPU().solve(model).sample

Re-exports of peer packages are identity, not copies:

import xquad, xqcp
assert xquad.cp.Problem is xqcp.Problem   # always True

So isinstance works whether the caller imported directly from the peer or via the umbrella.

Subnamespaces

xquad.*	Origin	Contents
xquad.program	first-party	Interactive API — Program, Session, RunResult
xquad.vm	first-party	Unified VM wrapper with backend dispatch (VMBackend.RUST / VMBackend.PYTHON)
xquad.types	first-party	Canonical Python type aliases used across the API
xquad.asm	re-exports xqffi.asm	parse_xqasm, assemble_source, disassemble
xquad.cp	re-exports xqcp	DSL — Problem, Types, expression builders
xquad.sa	re-exports xqsa	Solvers -- SolverDWaveCPU, Solver

Lower-level escape hatches remain available directly via the peer packages (xqffi.vm.Vm for the raw FFI one-shot surface; xqvm_py.Executor for the pure-Python reference VM).

Also see

• xqffi — PyO3 FFI bindings (low-level / conformance).
• xqvm_py — pure-Python reference VM (conformance oracle).
• xqcp — constraint-programming DSL.
• xqsa — solver adapters.
• docs/python-api-walkthrough.md — end-to-end tour including both the direct-peer and umbrella import styles.

License

AGPL-3.0-or-later.