Forums Technical Discussion How to use For Loop SOP to iterate over a dict?

How to use For Loop SOP to iterate over a dict?

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raincole
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For example, my geometry has this detail attribute :

{ "group1": 1, "group2": 1, "group3": 0}

And I'd like to use Blast SOP to delete groups whose values are 1 (in this case, group1 and group2).

A For Loop seems to be the reasonable solution:



... then I got stuck.

How to make it loops over len(my_attribute)times and how to access the dict's values from Blast SOP's parameters?
Edited by raincole - March 7, 2024 11:26:57

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Screenshot 2024-03-08 002415.png (54.7 KB)

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WalterGu
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use "name" node and set "Name frome Group" and "Group Mask" to get name attribute,then go to for loop
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alexwheezy
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I don't think For Each and Blast SOP are very suitable for this. The reason is that in a dictionary elements are accessed by key, not by index, so getting the length of the dictionary will not help much in the end. To make this possible For Each SOP needs to be able to iterate over keys and not over indexes, but this feature is not available here.

If you really need to iterate through the dictionary and look up or delete something, then use AttribWrangle.

dict dictionary = detail(0, "groups");
foreach(string grp; keys(dictionary)){
    // ...
}
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yeatshai
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Using python in blast should meet your requirements
geo = hou.pwd().input(0).geometry()
dic = geo.attribValue('detail_attrib')
lis = [k for k,v in dic.items() if v==1]
return(' '.join(lis))

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Edited by yeatshai - March 8, 2024 02:18:35

Attachments:
blast_group_thats_value_is_1.hipnc (46.0 KB)

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