<｜begin▁of▁sentence｜>### Instruction:
As a glassblower, imagine you have created a collection of interconnected glass sculptures representing a simple graph with edges connected to nodes by thin glass rods. Now, you are looking for a way to label each edge without the label overlapping the intricate design of the glass rods. How can you use a custom edge drawer in your glassblowing tools to determine the precise position for each label on the glass sculpture without disrupting the aesthetic appeal of the interconnected edges?
### Response:
import igraph as ig
import cairo

# Create some graph
g = ig.Graph([(0, 1), (1, 2), (2, 3), (3, 0)])

# Init Cairo surface
surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, 400, 400)
ctx = cairo.Context(surface)

# Create a plotter
plot = ig.Plot(surface)
plot.add(g)

# Override edge drawer
class CustomEdgeDrawer(ig.AbstractCairoEdgeDrawer):
    def draw_edge(self, edge, palette, *args, **kwds):
        # Your custom edge drawing logic here
        pass

    def get_label_position(self, edge, vertex1, vertex2):
        """Override label position for each edge"""
        midpoint = (vertex1['x'] + vertex2['x']) / 2, (vertex1['y'] + vertex2['y']) / 2
        alignment = (0, 0)  # Alignment can be adjusted to preference
        return midpoint, alignment

# Set custom edge drawer to the plot
plot.edge_drawer = CustomEdgeDrawer(plot.context)

# Draw and save to a PNG
plot.redraw()
surface.write_to_png('custom_edges.png')
<|EOT|>
