preset with expression

[Robert Kolbeins]

Hello,

with expression i can get a preset values like so,

value = parent["name"]

but if I try to use a variable to get different preset name I get Key Error:

name = "name"

value = parent[name]

Thanks,

R

[John Haddon]

Hi Robert,

Gaffer parses the Python expression so that it can connect the expression node to the plugs the expression reads from and writes to. So those plug names need to be constants that can be determined during parsing, not variables that could differ at execution time. Hopefully that makes sense?

Cheers...

John

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[Robert Kolbeins]

Hi John,

Thanks for clarifying that.  My solution is to connect those preset plugs to the spreadsheet and then query the spreadsheet in expression which works nicely.

Cheers,

Robert

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