👉 A cardiagraph is a type of network in which nodes are connected by edges. Nodes can be either physical or virtual, and an edge connects two nodes if it passes through them both. For example: ```python nodes = { "node1": {"name": "Alice", "age": 30}, "node2": {"name": "Bob", "age": 25} } ``` In this case, node1 has a name of Alice and is aged