Hello,


I have 10 box_objects in my scene. I'd like to get them as a list in python.
I know how to get a list of parameters of a node, but I would like to know how to get a list of nodes matching a name-string.
Something like (this is totally wrong pseudo-code but this is the general idea):


nodeorigin = hou.node('/obj')
boxlist =

Thanks!


———————————————————–

found this in the help… not exactly what I need but we're getting closer…

for n in hou.node(“/obj”).children():
print n.name()

I need this to be a list, and take out all objects without “box_object*” in the name…

Depending on exactly how your objects are named and whatnot you could go:

obj = hou.node('/obj')

For when the node name starts with your main string, so box_object*
boxes =

or for anything, *box_object*
boxes =

Thanks graham, that's awesome. Now I'm trying to accomplish the next part of the task… I've got this so far:

>>> boxes =
>>> boxes
[<hou.ObjNode of type geo at /obj/box_object1>,
<hou.ObjNode of type geo at /obj/box_object2>,
<hou.ObjNode of type geo at /obj/box_object3>,
<hou.ObjNode of type geo at /obj/box_object4>
]

————–
I would like to set, for example, the tx of all nodes in the list to 1.

(Here I tried to set all parms to 1 just to try, but I'd really just like to affect one or more parameters at a time)

>>> for theparm in boxes.parms():
… theparm.set(1)
…
Traceback (most recent call last):
File “<console>”, line 1, in <module>
AttributeError: ‘list’ object has no attribute ‘parms’

I am thinking I might need to use nested for loops here but can't quite get my head around the syntax yet…

To set tx to 1 on each box:

for box in boxes:
box.parm('tx').set(1)


To set all parms to 1:

for box in boxes:
for parm in box.parms():
parm.set(1)

Here's some other, more advanced ones.

Set multiple parms to the same value:

parms = ('tx', ‘ry’, ‘sz’)
value = 4
for box in boxes:
for parmname in parms:
box.parm(parmname),set(value)

Setting multiple parts with unique values:

parmdict = { ‘tx’: 4,
‘ry’: 50,
‘sz’: 2 }

for box in boxes:
for key in parmdict:
box.parm(key),set(parmdict.get(key)


Setting groups of parms with a similar value:

valdict = {5: ('tx', ‘rx’, ‘sx’),
7: ('ty', ‘ry’, ‘sy’),
19: ('tz', ‘rz’, ‘sz’),

for box in boxes:
for key in valdict:
for parm in valdict.get(key)
box.parm(parm).set(key)

really fantastic… You guys might want to consider adding some more of these beginner level notes to the HOM help, they might seem simple but for non-programmers it could be essential…



Another question, how to select a node in the network view using a python command?

Use:
hou.node(“/path/to/your/node”).setCurrent(1,1)
to select the target node and deselect everything else that is already selected.

hou.node(“/path/to/your/node”).setCurrent(1,0)
to select the target node while keeping the current selection.

Assuming your Houdini doc server is using the default port, go to:
http://localhost:48626/hom/hou/Node [localhost]

and search for setCurrent() for more details.

Excellent, thanks for your response!