SFC Variable Data Types

Working my way through my first SFC project and have noticed what seems to be a data type issue with chart-scoped variables. The help video mentions that variables can be any type that can be contained in a python dictionary, such as a list. However, if a list is passed to say, another enclosed chart, the beginning step wants a default chart parameter value. From what I can see, the default value uses the Expression Language, which does not seem to have a way to deal with a python “list” data type.

This situation also occurs if attempting to reference a member of a chart-scoped list in a transition expression. In this case, of course, the list member could be passed to another variable that the expression language can deal with. Would be nice to mention this in the help documentation. Or maybe I’m just missing something…

Any words of wisdom? Thanks.