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I mean, the last video we looked at, grid, forget using a button, so if we type something in click

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submit, it's on there, boom.

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If we click clear, it disappears.

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If we do it again and then pick something else, just anything, boom, it overwrites it.

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And the stuff from before is still there.

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So in this video, we want to look at how to get rid of the stuff that was there from before.

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Any time we click this button without clearing like that.

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Right.

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And now that we've done it more than once, the clear button itself won't work.

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So how do we fix this?

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Well, if we look at our code, remember, when we click the clear button, we were running this grid

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forget function.

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So you might be tempted just to say, well, why don't we just bring that up here?

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And for our segment function, whenever we click the button to submit, just have the first thing that

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happens is delete that, whatever is there prior.

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Right.

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So if there's something there, delete it already.

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Well, we can try that, but it's not going to work and let's see why.

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So let's go ahead and run this.

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So we can type something in and then click, oh, now it's not even working at all.

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So now if we close out, we see how the label is not defined.

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Well, that's sort of the same area we were getting earlier.

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What we're defining global label right there, but we haven't actually assigned anything to it yet.

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Right.

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So.

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We could try, just like we did earlier, going, hello, underscore label and start saying that equal

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to a label and putting that in root and then just leaving like that.

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If we try this, see what happens, it is not going to work.

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But it's it's not actually deleting the thing, right?

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So what's going on here?

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We could try destroying it.

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So what we need to do is pull this outside of our function.

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So anywhere above our function, we are on that now, we can save this and run it.

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Type of any old thing, and we type in something smaller, boom, it works and the clear button still

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works, do you do something really long, smaller again?

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And that works.

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So that's one way you could just sort of do it.

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You could also, instead of running our destroy thing here, we could call our clear function.

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All right, if we save this and run it.

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Um, something smaller firm that works as well.

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So probably I would just use this that way we can use this clear function for the button or we could

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use the clear function for, you know, just like this.

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If we take this off, we comment this out.

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Well, there's still work.

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Let's find out.

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So we can do some big thing.

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No, it doesn't.

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Everything shuts down because hello label is not defined.

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So always a good idea to sort of define your variables if you're going to be changing them during your

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program.

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You know, like if a user is going to be changing them on the screen, you want to define your things

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outside of your functions just right at the beginning of your your code here.

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And that will take care of all that.

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So pretty simple.

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A little tricky and I mentioned we're doing grid forget if this if we were using PAC instead of grid,

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we could do PAC forget and that works exactly the same way.

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Or you could just use destroy every time to write.

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That works as well, too.

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It just sort of depends.

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There are times when you might want to hide something but not delete it forever and you would use grid

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forget or PAC forget.

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Other times you may just want to destroy a thing completely, so destroy works as well.

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So that's how to overwrite things like labels.

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This will work with other widgets as well.

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You can grid forget any anything really a button, an image, anything at all you can forget or destroy

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and that'll work.

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So in the next video we're going to look at the color picker.