OK cool I think I understand... to confirm then, these three examples are
all equivalent:
m.addCommand("Add My Slate", "nuke.createNode('mySlate')")
m.addCommand("Add My Slate", "nuke.createNode(\"mySlate\")")
m.addCommand("Add My Slate", lambda: nuke.createNode("mySlate"))
Where 'mySlate' is a gizmo sourced in the plugin_path.
Is that right? I have been using the first syntax for years, the others
seem more complicated than necessary if indeed they're equivalent.
Thanks for the tips!
-Matt
On Mon, Nov 17, 2014 at 1:51 PM, Nathan Rusch <nathan_ru...@hotmail.com>
wrote:
> The first form uses a string argument, and the backslashes are there to
> escape the double quotes inside other double quotes. You could replace
> either the inner or outer quote pairs with single quotes in that example
> and get rid of the backslashes.
>
> The second example (using "lambda: ") creates an anonymous function that
> takes no arguments and which just calls `nuke.createNode("Blur")` when
> called, and then binds the resulting function to the menu command.
>
> If you use the string form, the string will be exec'ed when the menu
> command is invoked. If you use a callable, it will be called (with no
> arguments).
>
> You can't use `m.addCommand("Filters/Blur", nuke.createNode("Blur"))`,
> because `nuke.createNode("Blur")` will be called when the addCommand method
> is called (while the menus are being built). In other words, you will be
> trying to pass a created node to `m.addCommand()`.
>
> -Nathan
>
>
> *From:* Matthew Doll <mattd...@gmail.com>
> *Sent:* Monday, November 17, 2014 1:15 PM
> *To:* Nuke Python discussion <nuke-python@support.thefoundry.co.uk>
> *Subject:* [Nuke-python] "lambda" or \"xyz\"
>
> In the docs about adding menu items it mentions both:
>
> m.addCommand("Filters/Blur", "nuke.createNode(\"Blur\")" )
> or its alternative:
> m.addCommand("Filters/Blur", lambda: nuke.createNode("Blur") )
>
>
> I'm not clear what is the functionality here, why not:
> m.addCommand("Filters/Blur", nuke.createNode("Blur"))
>
> I can't find any references on this list or in the docs to what exactly
> those backslashes or "lambda:" actually do.
>
> Thanks,
> Matt
>
> ------------------------------
> _______________________________________________
> Nuke-python mailing list
> Nuke-python@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/
> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-python
>
>
> _______________________________________________
> Nuke-python mailing list
> Nuke-python@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/
> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-python
>
>
_______________________________________________
Nuke-python mailing list
Nuke-python@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/
http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-python
