<｜begin▁of▁sentence｜>### Instruction:
How can you use the AlphaVaryingEdgeDrawer, which inherits from AbstractCairoEdgeDrawer, to draw directed edges with varying transparency on a Plot in igraph?
### Response:
from igraph import Graph
from igraph.drawing import Plot
from igraph.drawing.edge import AlphaVaryingEdgeDrawer

# Create a simple graph
g = Graph.Erdos_Renyi(n=5, m=10)

# Define a visual style for the graph
visual_style = {
    'vertex_color': 'light blue',
    'vertex_size': 20,
    'edge_curved': False,
    'edge_width': 1.5
}

# Create a plot with an alpha varying edge drawer
plot = Plot(backend='cairo', bbox=(300, 300), background='white')
plot.add(g, **visual_style)
edge_drawer = AlphaVaryingEdgeDrawer(plot.backend.ctx, palette=plot.palette)

# Drawing edges using the custom edge drawer
for edge in g.es:
    edge_drawer.draw_directed_edge(edge, g.vs[edge.source], g.vs[edge.target])

plot.show()
<|EOT|>
