Quick Start

Installation

Let’s first install node-graph via pip:

$ pip install node-graph

First workflow

Suppose we want to calculate (x + y) * z in two steps.

• step 1: add x and y

• step 2: then multiply the result with z.

Create task

Task is the basic building block of a workflow. One can create a task from a Python function using the decorator:

from node_graph.decorator import task


@task()
def add(x, y):
    return x + y


@task()
def multiply(x, y):
    return x * y


@task.graph()
def AddMultiply(x, y, z):
    the_sum = add(x=x, y=y).result
    return multiply(x=the_sum, y=z).result


ng = AddMultiply.build(x=1, y=2, z=3)
ng.to_html()