How can I represent a Python dictionary in UML?

Question

I would like to know how I can represent a Python dictionary using UML. This dictionary is an attribute of a class called Digraph. The keys are of type Node, and the values are of type Edge.

Answer 1

Qualified associations are useful for modeling maps/dictionaries.

See uml-diagrams.org for some examples.

You can also read the official UML (2.5) specs (see page 215)

And your particular problem can be represented as:

However note that this is only for nodes with single outgoing edges (its one-to-one mapping); if this wasn't your intention than the mapping would have to be Node to array of Edges. (and changing 1 into *).