Node default input another node

1

Hi, how do I get the default to be the python code if the user doesn’t put something in?

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2

Instead of putting the ‘if node’ in there, put both items into the next Python node.

elevationType = IN[5]
if elevationType == None: elevationType = IN[5]

Note that as you’re passing a nested list of var things get more complex, so be sure that your ElevationType node is outputting the right structure. My gut says you want that input to be ‘var’.

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3

Use the python script to test

if IN[0]:
    OUT = IN[0]
else:
    OUT = "My default"

also set default in the input node
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2 Likes
4

Python comparison syntax for None uses the is and is not operators - see PEP 8

5

I’m pretty confused sorry. Do you mean the main python node?

6

While generally I don’t like Pep 8 (and don’t bother to follow it’s recommendations at all as it isn’t applied within the community and IMO is actually not helpful for the majority of the Dynamo community), that’s a good call here.

7

Yes. Put those lines in the Python Script node (using whatever variable you call out in the code rather than what I named it).

8

Like this? :sweat_smile:

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9

Yes, I’m not too fussed about being pythonic, I just use Ruff in VSCode and forget about it

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10

Like this?

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11

Yes - looks like it. If that doesn’t work, then my guess is there is an issue with the list structure (see my previous comment on var[]..[]).

12

should the input be blue though for the default input? The list structure is just one input not in a list
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13

Not at a PC, but try changing the input mode to:
elementTypes: var = null //add a description too

14

Slowly maybe getting it, appreciate the patients. Put the node on default input but it didn’t run when its a node. When its taken out the node and run in the project it works. Is the default input a list?

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Editing a node from a project is a bit annoying. Its always autosaving to the project name. Not sure if you know a way to stop that?
ElevationByCropCurves.dyf (17.5 KB)

15

ok changing it to an elementtype input stuffed it up wanting specific inputs for everything I think. Back to var… and its working again. Thanks for the help!

16

Sadly a long standing bug. Can you log it to the GitHub as an issue so we can get the Dev team’s attention?

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