The code is a visual representation of a process using Graphviz, comprising a single 'digraph' statement with a name 'apply' and several nodes and edges that outline the steps from registering a new customer to upgrading a plan. The code includes various attributes for nodes and edges, a subgraph for available plans, and a specific layout direction and edge color specification.

Cell 2

%%
dot

digraph
apply
{
    label = '2017 Updated'
    rankdir = LR;
    fontname = Helvetica
    node[fontname = Helvetica, width = 1.8, height = 0.8]
    edge[fontname = Helvetica, fontsize = 12, fontcolor = blue, labeldistance = 1.8]

    start [shape = box, style = rounded, label = 'Register New\nCustomer'];
    selectrp[shape = 'box', label = 'Select Rate Plan'];

    subgraph
    cluster_available_plans
    {
        label = 'Available Plans'
        style = filled;
        fillcolor = grey92
        rank = same;
        monthly    [shape = box, label = 'Act! Premium 2017\nUpdate - Monthly\nSubscription\n$30']
        annual     [shape = box, label = 'Act! Premium 2017\nUpdate - Annual\nSubscription\n$300']
        perpetual  [shape = box, label = 'Act! Premium 2017\nUpdate - Perpetual\nLicense\n$600']
        year2      [shape = box, label = 'Act! Premium 2017\nUpdate - Annual\nSubscription (2 Year\nContract)\n$540']
    }

    upgrade[shape = 'diamond', label = 'Upgrade\nNew\nCustomer', rank = min];

    node [shape = box];
    {
        start->selectrp->upgrade [color = invis];
        rankdir = LR;
    }

    start:e -> selectrp
:
    w
    selectrp:e -> monthly
:
    w
    selectrp:e -> annual
:
    w
    selectrp:e-> perpetual
:
    w
    selectrp:e -> year2
:
    w
    monthly:e -> upgrade
:
    w
    annual:e -> upgrade
:
    w
    perpetual:e -> upgrade
:
    w
    year2:e -> upgrade
:
    w
    upgrade:s -> selectrp
:
    s
}

import graphviz

# Define the graph
dot = graphviz.Digraph(
    name='rate_plan_selection',
    engine='dot',
    format='png',
    direction='LR',
    graph_attr={
        'fontname': 'Helvetica',
        'fontsize': 12
    },
    node_attr={
        'fontname': 'Helvetica',
        'width': 1.8,
        'height': 0.8
    },
    edge_attr={
        'fontname': 'Helvetica',
        'fontsize': 12,
        'fontcolor': 'blue',
        'labeldistance': 1.8
    }
)

# Define nodes
start_node = dot.node(name='start', label='Register New\nCustomer', shape='box', style='rounded')
select_rp_node = dot.node(name='selectrp', label='Select Rate Plan')

# Define subgraph for available plans
available_plans_cluster = dot.subgraph(name='cluster_available_plans', label='Available Plans', style='filled', fillcolor='grey92')
dot.node('monthly', label='Act! Premium 2017\nUpdate - Monthly\nSubscription\n$30', shape='box', parent=available_plans_cluster, rank='same')
dot.node('annual', label='Act! Premium 2017\nUpdate - Annual\nSubscription\n$300', shape='box', parent=available_plans_cluster, rank='same')
dot.node('perpetual', label='Act! Premium 2017\nUpdate - Perpetual\nLicense\n$600', shape='box', parent=available_plans_cluster, rank='same')
dot.node('year2', label='Act! Premium 2017\nUpdate - Annual\nSubscription (2 Year\nContract)\n$540', shape='box', parent=available_plans_cluster, rank='same')

# Define upgrade node
upgrade_node = dot.node(name='upgrade', label='Upgrade\nNew\nCustomer', shape='diamond', rank='min')

# Add edges
dot.edge('start','selectrp')
dot.edge('selectrp','monthly')
dot.edge('selectrp', 'annual')
dot.edge('selectrp', 'perpetual')
dot.edge('selectrp', 'year2')
dot.edge('monthly', 'upgrade')
dot.edge('annual', 'upgrade')
dot.edge('perpetual', 'upgrade')
dot.edge('year2', 'upgrade')
dot.edge('upgrade','selectrp')

# Render the graph
dot.render('rate_plan_selection')

# TODO: improve graph visualization, e.g., adjust node positions, add more labels

Graphviz Code

This code is written in Graphviz, a tool for visualizing and drawing graphs.

Code Structure

The code consists of a single digraph statement with a name apply and the label '2017 Updated'.

Node and Edge Attributes

The code defines several attributes for nodes and edges:

• Node attributes: fontname, width, height
• Edge attributes: fontname, fontsize, fontcolor, labeldistance

Nodes

The code defines several nodes:

• start: a rounded box with the label 'Register New Customer'
• selectrp: a box with the label 'Select Rate Plan'
• monthly, annual, perpetual, year2: boxes representing available plans with their respective labels and attributes

Subgraph

The code defines a subgraph cluster_available_plans with the label 'Available Plans'. This subgraph contains the four available plan nodes.

Edges

The code defines several edges between nodes, including:

• start -> selectrp
• selectrp -> monthly, annual, perpetual, year2
• monthly, annual, perpetual, year2 -> upgrade
• upgrade -> selectrp

Layout

The code uses the rankdir attribute to specify the layout direction (left-to-right) and the rank attribute to specify the rank of nodes within the subgraph.

Miscellaneous

The code uses the color attribute to set the edge color to invisible for a specific edge.