Insert scale refactoring

[jazzsta]

Hello,
apparently in the later versions of python StopIteration exception raises a runtime error. Here there is more on that:
https://peps.python.org/pep-0479/

Therefore we have to change the insert_scale method code, in particular line 1099

sup_components = dict((v, next(g.component_roots_iter(v))) for v in sup_vertices)

raises a runtime error and stops execution. I replaced it with

sup_components = dict()
for v in sup_vertices:
iteratorr = g.component_roots_iter(v)
while True:
try:
sup_components[v] = next(iteratorr)
except StopIteration:
break

And now it seems to work fine.
Can you verify that this is correct ?

[pradal]

Can you give me more context?
Do you have a small example to reproduce the error?

[jazzsta]

Let's take the mtg given in the example
https://mtg.readthedocs.io/en/latest/_downloads/0717997b5b681c0498e3c9ca16a5bca7/agraf.mtg

and try the script

from openalea.mtg import mtg

g=mtg.MTG('C:\GitModeles//agraf.mtg')

def partition(n,MTG=g):
    if g.node(n).label == 'E1':
        return True
    else:
        return False
    
g.insert_scale(3,partition,"mm")

It gives

RuntimeError: generator raised StopIteration