Python from string parameter

[Drughi]

Hi,

I have a string paramter on a node containing some python code and a button wich should execute the code. How do I write a callback script on the button so it executes the code stored as string in the other paramter?

[Alain2131]

See this
The eval() function is what you are looking for

stringCode = node.parm("someCodeParm").eval()
eval(stringCode) 

As for calling this code when pressing a button, is this inside an HDA ?

Edited February 5, 2019 by Alain2131

[Drughi]

16 hours ago, Alain2131 said:

See this
The eval() function is what you are looking for

stringCode = node.parm("someCodeParm").eval()
eval(stringCode) 

As for calling this code when pressing a button, is this inside an HDA ?

Ok, so now my Buttons callback script is: eval(kwargs['node'].parm('python').eval())

I've set the Python code string Tags to script_callback_language: python and editorlang: python.

Just for testing I've just added: print "Yeay, it worked"

But I'm getting the error:
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
SyntaxError: ('invalid syntax', ('<string>', 1, 5, 'print "Yeay, it worked"'))

What am I doing wrong?

Edited February 5, 2019 by Drughi

[Alain2131]

Okay, I see now
My bad, here's the "right-er" info here

In fact, it's "exec" that you want

exec(kwargs['node'].parm('python').eval())

See below for the test I did

Edited February 5, 2019 by Alain2131

[Drughi]

Cool, it worked! Thank you!