IsDerivedFrom() "modifies" an object?

[yorik]

If I take an object form the document, and use its IsDerivedFrom() method like this:

Code: Select all

myobject.isDerivedFrom("Part::Feature")

myobject is marked as "changed" somehow, that means for example if it is inside a PropertyLink of another object, that other object gets triggered too...
It looks to me it shouldn't be the case, as that method doesn't change the object. I think I remember that you can mark a python method as "const" or imutable somewhere, but I cannot find where in the source... Can anyone help?
Thx
Y

[wmayer]

Yes, that's exactly the error. For all the generated Python bindings we have an XML model where all methods which doesn't change the object should have an attribute Const="true". Unfortunately, this isn't done very studiously. In the past this error didn't appear but with my changes to allow to write more pythonic code this has issue appeared. So, at a time we have to through all XML files again and look where we have to fix this thing.

In the current case the culprit is BaseClassPy.xml. It's hopefully fixed in the latest revision.

[yorik]

Great, thanks! Now I understand, if I see more of those I can fix them myself.