App::PropertyLinkList cannot append / pop / clear etc…

[Cyril]

Hi,

I wonder why it is not possible possible to use App::PropertyLinkList as a standard list.

Code: Select all

object_1.property.append(object_2)

=> No error but object_2 is not appended

Code: Select all

object_1.property.pop()

=> No error and it return an object but this object is not removed from the list

Code: Select all

object_1.property.clear()

=> No error but it does nothing

Etc…

Apparently when we use a standard list method it affects a copy of the list and not the list stored in the property.

• Is there any reason that we cannot directly modify the list ?
• If not. Would it be easy and desirable to change this behavior

[wandererfan]

• Is there any reason that we cannot directly modify the list ?
• If not. Would it be easy and desirable to change this behavior

In C++ we must do it more or less like this:

Code: Select all

myList = App.ActiveDocument.myObject.LinkListProperty.copy()
myList.append(anotherLink);
App.ActiveDocument.myObject.LinkListProperty = myList

I believe Python works in a similar fashion.

PropertyLinkList isn't really a list behind the scenes - there's all sorts of background activity.

So to actually answer the questions:
A) yes there is a reason - it isn't really a list
B) definitely not easy - would involve big changes to the Property system.

[Cyril]

Too bad. Thanks for your answer !