+54Is it possible to use a negative list index in the AttributeCreator? If not possible, why not? Any technical reason or just not implemented? Should I create an Idea for it?
Workaround is to use the ListIndexer, and AttributeRenamer but this is not really intuitive nor quick. Unlike most things in FME.
Best answer by trentatsafe
Hello @nielsgerrits,
This negative list element is currently not implemented into FME. However, there is an idea that has been posted. If you want to head over and post a comment/upvote that will give it more standing with developers when they go to add new features.
The idea can be found here: https://knowledge.safe.com/idea/37432/reverse-list-element-selection.html
+6Hello @nielsgerrits,
This negative list element is currently not implemented into FME. However, there is an idea that has been posted. If you want to head over and post a comment/upvote that will give it more standing with developers when they go to add new features.
The idea can be found here: https://knowledge.safe.com/idea/37432/reverse-list-element-selection.html
import fme
import fmeobjects
def processFeature(feature):
list = feature.getAttribute('_testList{}.testattribute')
print list[-1]
In those cases, I think it is easy to work with a pythoncaller.
I have added a small sample workspace that builds a simple list attribute. The pythoncaller is used to extract this list attribute into a new python list variable (see code above). There it is possible to use negative indices.
This is just a simple example to show you this is possible. ;)
+54Hello @nielsgerrits,
This negative list element is currently not implemented into FME. However, there is an idea that has been posted. If you want to head over and post a comment/upvote that will give it more standing with developers when they go to add new features.
The idea can be found here: https://knowledge.safe.com/idea/37432/reverse-list-element-selection.html
Thanks for pointing out, I should have searched the Ideas as well before posting this question.
+54import fme
import fmeobjects
def processFeature(feature):
list = feature.getAttribute('_testList{}.testattribute')
print list[-1]
In those cases, I think it is easy to work with a pythoncaller.
I have added a small sample workspace that builds a simple list attribute. The pythoncaller is used to extract this list attribute into a new python list variable (see code above). There it is possible to use negative indices.
This is just a simple example to show you this is possible. ;)
Thanks for the working example!
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