<｜begin▁of▁sentence｜>### Instruction:
As a sales associate working in an online retail platform, you may encounter a situation where you need to integrate a custom shape drawer class named 'custom_shape' into the system in order to visualize nodes in a graph for better understanding of customer behavior and preferences. To achieve this, you will need to register the custom shape drawer in igraph's ShapeDrawerDirectory so that it can be utilized for graph plotting. This will help you in effectively analyzing and presenting data to improve sales strategies and customer experience.
### Response:
from igraph.drawing.shapes import ShapeDrawerDirectory

# Define a custom shape drawer class
class MyCustomShapeDrawer:
    # implement required drawing methods...
    pass

# Register the custom shape drawer class under a new name
ShapeDrawerDirectory.register('custom_shape', MyCustomShapeDrawer)

# Now you can use 'custom_shape' in plotting functions to draw nodes with your custom shape
<|EOT|>
