The Locals tool should show the variable type.
Currently it has "Name" and "Value".
Sometimes "Value" shows the type, like "dict".
For basic types (string, int, etc) it shows the value.
I'd like a "Type" column that always shows the type.
Also, Value could show the value of a list or dict -- for small lists and dicts the contents could show as a single line in Value. (Still support expansion though!)
Oddly enough, the type "defaultdict" does show its value in "Value".