list_to_graph.py

import graphviz as gv

tree = [54, 26, 15, 93, 8, 1, 23, 39];

def left_child(index, length):
    child = (index * 2 + 1)
    if (child <= length - 1):
        return child
    else:
        return -1

def right_child(index, length):
    child = (index * 2 + 2)
    if (child <= length - 1):
        return child
    else:
        return -1

def main():
    g1 = gv.Graph(format='svg')
    for index, value in enumerate(tree):
        left_index = left_child(index, len(tree))
        right_index = right_child(index, len(tree))
        if (left_index != -1):
            g1.edge(str(value), str(tree[left_index]))
        if (right_index != -1):
            g1.edge(str(value), str(tree[right_index]))

    #Print the GraphViz code
    print(g1.source)
    # Render the graph
    filename = g1.render(filename='img/graph')
    print (filename)

main()