cicspi

cicspi is a small SPICE parsing toolbox that reads .subckt definitions into a Python object hierarchy and exposes a simple CLI.

Install

python3 -m pip install cicspi

CLI

Print the node list for a subckt in a SPICE file:

cicspi nodes path/to/netlist.spi my_subckt

Python usage

import cicspi

parser = cicspi.SpiceParser()
parser.parseFile("path/to/netlist.spi")

# SpiceParser is a dict: subckt name → Subckt object
ckt = parser["my_subckt"]

print(ckt.nodes)        # list of port node names
print(ckt.instances)    # list of SubcktInstance objects

# Collapse bus signals (e.g. A[0], A[1] → A[0:1])
print(ckt.nodesWithBus())

# Iterate instances
for inst in ckt.instances:
    print(inst.name, inst.subcktName, inst.nodes)

# Emit SPICE text
print(ckt.tospice())

# JSON round-trip
import json
print(json.dumps(ckt.toJson(), indent=2))

Object model

Release flow

PyPI publishing is handled by GitHub Actions in .github/workflows/release.yml. Push a tag to trigger a release:

git tag 0.x.y && git push origin 0.x.y

The workflow builds the package, publishes to PyPI via OIDC trusted publishing, and creates a GitHub release with the distribution artifacts attached.