<｜begin▁of▁sentence｜>### Instruction:
Suppose you have a simple graph with a set of edges and you want to find out where to position the labels for these edges when drawing them, such as avoiding overlap with the actual edges. How would you implement a method to compute the label positions and their alignments using a custom edge drawer that extends from AbstractEdgeDrawer in igraph?
### Response:
import igraph as ig

# Assuming we have a graph instance, an edge ID, and coordinates for source and destination vertices
g = ig.Graph(edges=[(0, 1), (1, 2), (2, 3)])
edge_id = 1
src_vertex = (0, 0)
dest_vertex = (1, 1)

# Custom edge drawer class inheriting from AbstractEdgeDrawer
class MyEdgeDrawer(ig.drawing.edge.AbstractEdgeDrawer):
    def get_label_position(self, edge, src_vertex, dest_vertex):
        # Calling the superclass method to get the default position and alignment
        position, alignment = super(MyEdgeDrawer, self).get_label_position(edge, src_vertex, dest_vertex)
        # Custom logic can be applied here if needed
        return position, alignment

# Instantiate the custom edge drawer
edge_drawer = MyEdgeDrawer(None)
# Get the label position and alignment for the edge with ID edge_id
label_pos, label_alignment = edge_drawer.get_label_position(g.es[edge_id], src_vertex, dest_vertex)
print('Label Position:', label_pos, '\nLabel Alignment:', label_alignment)
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