fluss
The python client for fluss, the Arkitekt workflow service: designing, storing and running workflows (flows) that wire the actions of your apps together.
Installation
pip install fluss
The flow executor is an optional extra, because it needs rekuest while the plain client does not:
pip install "fluss[engine]" # run flows (fluss.engine)
pip install "fluss[python]" # also run flows written as Python source
With arkitekt, pip install "arkitekt[rekuest,fluss]" brings it in.
Design
A flow is a graph: argument nodes feed reactive and action nodes, whose outputs reach return
nodes. Flows live in workspaces, and every execution of a flow is a run. fluss is the client
for that graph — it queries and mutates flows, workspaces and runs on the fluss server — and
fluss.engine is what executes one.
Usage
Every fluss operation is a method of the Fluss client, in a blocking and an a-prefixed async
flavour (fluss.get_flow(id), await fluss.aget_flow(id)).
In an arkitekt app
Add the service to your app and ask for fluss: Fluss; the client is injected by annotation. Flows
and runs travel between actions by id (@fluss/flow, @fluss/run, @fluss/pythonflow,
@fluss/pythonrun), so an action can take and return them directly:
from arkitekt import App, run
from fluss import Fluss, fluss_service
from fluss.api.schema import Flow
app = App("flow-inspector", "0.1.0", services=[fluss_service])
@app.action
def describe_flow(flow: Flow, fluss: Fluss) -> str:
"""Describe Flow"""
return f"{flow.title} in workspace {flow.workspace.id}"
if __name__ == "__main__":
run(app)
An app built with the fluss service also offers the generic Run Flow action (interface
run_flow), so it can execute any flow it is handed (Run Python Flow too, with the python
extra).
From a script
from arkitekt import easy
from fluss import fluss_service
with easy("my-script", fluss_service) as fluss:
for flow in fluss.flows(limit=10):
print(flow.id, flow.title)
The engine
fluss.engine executes a flow as a generic rekuest action: given a flow and a dict of arguments it
yields the flow's returns, so a workflow can be called like any other action.
A flow run is registered as a rekuest workflow: if the agent running it dies, it is resumed, and the node calls that already finished return their recorded results instead of running again. Each call is keyed by its node and how often that node ran, so concurrent branches are found again whichever order they finish in.
from fluss.engine import run_flow, arun_flow
It imports rekuest at module level, so install fluss[engine] to use it. Importing plain fluss
never requires rekuest.
Testing
uv run pytest -m "not integration" # no server needed
uv run pytest -m integration # a real fluss server via dokker
See RELEASING.md for how versions are cut.
1 maintainer
Metadata
1 maintainer
Release files for fluss 5.0.0
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| fluss-5.0.0.tar.gz | 95.1 kB | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| fluss-5.0.0-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 212.0 kB
Release files / fluss-5.0.0.tar.gz
| Download URL | fluss-5.0.0.tar.gz |
|---|---|
| Size | 95.1 kB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
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uv/0.13.0 {"installer":{"name":"uv","version":"0.13.0","subcommand":["publish"]},"python":null,"implementation":{"name":null,"version":null},"distro":{"name":"Ubuntu","version":"24.04","id":"noble","libc":null},"system":{"name":null,"release":null},"cpu":null,"openssl_version":null,"setuptools_version":null,"rustc_version":null,"ci":true}
|
Release files / fluss-5.0.0-py3-none-any.whl
| Download URL | fluss-5.0.0-py3-none-any.whl |
|---|---|
| Size | 116.9 kB |
| Tags | Python 3 |
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SHA-256 checksum How to use checksums |
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| Uploaded via |
uv/0.13.0 {"installer":{"name":"uv","version":"0.13.0","subcommand":["publish"]},"python":null,"implementation":{"name":null,"version":null},"distro":{"name":"Ubuntu","version":"24.04","id":"noble","libc":null},"system":{"name":null,"release":null},"cpu":null,"openssl_version":null,"setuptools_version":null,"rustc_version":null,"ci":true}
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