This page maps the current package structure and common imports.

Core packages

• opentestability.core.common — shared circuit representation and gate classifier
  • CircuitIndex: integer-indexed, CSR-backed circuit graph (signal names → ints, fan-in/fan-out CSR arrays, topological order, levelization)
  • GateCode / classify(gtype): canonical gate-type codes computed once per gate; eliminates per-iteration string matching
• opentestability.core.cop — COP analysis (runtime: cop/vectorized.py)
• opentestability.core.scoap — SCOAP analysis (runtime: scoap/accelerated.py → Cython _kernels.pyx)
• opentestability.core.dag — DAG construction helpers
• opentestability.core.reconvergence — fanout/reconvergence detection
• opentestability.core.testpoint — TPI orchestration

Common imports

from opentestability.core.cop import run_cop
from opentestability.core.scoap import run as run_scoap
from opentestability.core.dag import create_dag_from_netlist
from opentestability.core.reconvergence import ReconvergenceIntegrator
from opentestability.core.testpoint import TPIOrchestrator

Typical use

from opentestability.core.cop import run_cop

run_cop(
    input_file="circuit.txt",
    output_file="cop_results.txt",
    reconvergence_algorithm="simple",
    auto_parallel=True,
)

Detailed module pages

1. COP API
2. SCOAP API

Developer note

Prefer package-level imports from __init__.py where available. Move to internal module imports only when you need behavior not exposed in package-level APIs.