From graph to .dot file python

I have a tree represented by this string (this is a decision tree made by scratch): {'index': 1, 'right': {'index': 0, 'right': 'no', 'value': 'overcast', 'left': 'Yes'}, 'value': 'Mild', 'left': {'index': 0, 'right': {'index': 0, 'right': 'Yes', 'value': 'overcast', 'left': 'Yes'}, 'value': 'rain', 'left': {'index': 0, 'right': 'Yes', 'value': 'rain', 'left': 'Yes'}}}

and I'd like to represent it (with edges and nodes using Graphviz). To print it I use this function in Python:

def print_tree(node, depth=0):
    filename = outlook.csv'
    dataset = load_csv(filename)
    columns = dataset[0]
    if isinstance(node, dict):

        print('%s[%s = %s]' % ((depth * ' ', (columns[node['index']]), node['value'])))
        print_tree(node['left'], depth+1)
        print_tree(node['right'], depth+1)
    else:
        print('%s[%s]' % ((depth*' ', node)))

I'd like to use Digraph from GraphViz from graphviz import Digraph

 def createGraph(node):
 dot = Digraph(comment="experiment")
 def graph(node):
  if isinstance(node, dict):
    dot.node(str(id(node)))
    dot.edge(str(id(node)) , str(id(node['right'])))
    graph(node['left'])
    graph(node['right'])
  else:
    dot.node(str(id(node)), str(node))
  dot.render('test-output/roundround5.gv', view=True)
 'test-output/round.gv.pdf'
graph(node)

but obviously code is wrong. Can anybody help?

Solution

There's some syntax errors in your code blocks, the filename outlook.csv is not quoted correctly, and there's an extra string 'test-output/round.gv.pdf' on the end of the graphing block.

The main problem though seems to be that you are building a new Digraph object for every call to graph(), and you are calling graph recursively. Instead you need to make one Digraph, and pass that into the first call to graph, and then recursively add the graph nodes.

Can you expand your question a bit - address the syntax errors and then provide an example of an errors or incorrect output you are seeing?