Revit Python have problem with isinstance()

Question

I use if isinstance(ins,list): to check . but it returned false Although ins is the List[Object]

def getname(ins):
    name=[]
    if isinstance(ins,list):
        for i in ins:
            name.append(i.Name)
    else:
        name.append(ins.Name)
    return name

Levels = FilteredElementCollector(doc).OfClass(Level).ToElements()
ULevels = UnwrapElement(Levels)
Levelsname = getname(ULevels)

Error message is:

AttributeError: 'List[object]' object has no attribute 'Name'

Answer 1

You can do it in a single line of code like this:

[UnwrapElement(x).Name for x in FilteredElementCollector(doc).OfClass(Level).ToElements()]

Since I can see you are using Dynamo you can also do it like this: