test.py

from igraph import *

# Create graph
g = Graph(directed=True)

# Add 5 vertices
g.add_vertices(5)

# Add ids and labels to vertices
for i in range(len(g.vs)):
    g.vs[i]["id"]= i
    g.vs[i]["label"]= str(i)

# Add edges
g.add_edges([(0,2),(0,1),(0,3),(1,2),(1,3),(2,4),(3,4)])

# Add weights and edge labels
weights = [8,6,3,5,6,4,9]
g.es['weight'] = weights
g.es['label'] = weights

visual_style = {}

out_name = "graph.png"

# Set bbox and margin
visual_style["bbox"] = (400,400)
visual_style["margin"] = 27

# Set vertex colours
visual_style["vertex_color"] = 'white'

# Set vertex size
visual_style["vertex_size"] = 45


# Set the layout
my_layout = g.layout_lgl()
visual_style["layout"] = my_layout
# Plot the graph
plot(g, out_name, **visual_style)