Lambdas are particularly confusing, too. Your original attempt
command=lambda *x: self.add_btn_callback("item_list")
doesn't actually call the function add_btn_callback, even though it looks
like it does. It creates a new function that will call add_btn_callback
later.
I prefer partial instead, because it seems clearer to me what is happening.
partial is similar to lambda. It creates a new function that will call your
function with given arguments:
from functools import partial
...
command=partial(add_btn_callback, "item_list")
And I should warn you: right now your argument is a constant string
"item_list". Things get even weirder if you have arguments whose values
might be different when the button is clicked than they are now.
On Wednesday, 15 March 2017 11:49:31 UTC+11, Justin Israel wrote:
>
>
>
> On Wed, Mar 15, 2017 at 1:40 PM likage <[email protected] <javascript:>>
> wrote:
>
>> From the flags, though it mentions of `script` I had assumed that it will
>> worked with a normal method too..
>>
>
> This refers to the ability to pass script logic in string form. In MEL
> there are no first class functions so your only option is to pass a string
> with MEL script to run. In python you can either pass Python script to be
> evaluated, or a callable object.
>
>
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