Dictionary values can be dictionaries themselves:
users = {
"alice": {"age": 30, "city": "NYC"},
"bob": {"age": 25, "city": "LA"}
}
print(users["alice"]["city"]) # NYC
Access with chained brackets. First bracket gets the outer dictionary's value (another dictionary), second bracket gets from that inner dictionary.
This is common for storing structured data like user profiles or configuration.