How to ask to check if ...[solved]

[namastaii]

Okay so I give up and come here because I've been searching the web for this and I can only find information on how to find out if there is a specific value in a list.

How do I just simply make an 'if' statement that says if there is two items in a list then do something?

I'm basically trying to do something like this:

Code: Select all

        if my_list[0]:
            text "[my_list[0]]"
        if my_list[1]:
            text "[my_list[1]]"

I just apparently can't figure out the right way to format this

because without the 'if' statements then I will get an index out of range error obviously if the list doesn't have enough in it so I want it to go off of what is available because it will change a lot

[Zetsubou]

If you're checking the length of the list, you want len().

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if len(myList) == 1:
    "One item in the list"
elif len(myList) == 2:
    "Two items in the list"

If you're checking for a specific value in a list, use "in".

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if "mystring" in myList:
    "Yep, it's in there."
else:
    "...Nope."

myList[0] would return the first value in the list, myList[1] the second, and so on.
Like that, you're accessing values at different indexes.
So len() for length, [index] for actually accessing a value.

[namastaii]

I tried len and it didn't work.. I will look at it again. Maybe I phrased it differently. Seems pretty straight forward to me.

[trooper6]

Do you just want a for loop?

You can see how I use a for loop in an inventory screen in this thread:
viewtopic.php?f=8&t=30788

[PyTom]

Do you mean, is a particular item in the list twice? If so, you probably want to use a list comprehension. List comprehensions are a way to make another list from your list. You can then take the len from that second list. So you can write:

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if len([i for i in myList if i == "banana" ]) >= 2:
    "There are at least two bananas in the list. That's practically a bunch!"

If this isn't it, we might need an example of what you're trying to do.

[namastaii]

Do you just want a for loop?

You can see how I use a for loop in an inventory screen in this thread:
viewtopic.php?f=8&t=30788

I know about the for loop but with my screen, I have it a certain way so I'm doing them individually instead of listing them all in one place.

Do you mean, is a particular item in the list twice? If so, you probably want to use a list comprehension. List comprehensions are a way to make another list from your list. You can then take the len from that second list. So you can write:

Code: Select all

if len([i for i in myList if i == "banana" ]) >= 2:
    "There are at least two bananas in the list. That's practically a bunch!"

If this isn't it, we might need an example of what you're trying to do.

No, these aren't items or anything they're just phrases that are going to be grouped up and I don't need to know of any duplicates. I just need to ... I have a screen that lists each thing in the list. I know a for loop can do this but I just want to do each item separately because of the theme I have. I put each one in an hbox with other elements is why. I just want some if statements where if there is one item, then list it, if there are two then list the second one too, if there isn't a third then don't list it but that spot is available once there is a third one. But to stay within my theme. There is probably a 'better' way to do this but I like the way I'm doing it. I will try out the first example that was posted, I'm just away from a computer until tomorrow.

[Onishion]

Well, the problem with how you originally did it is, if there is no "my_list[4]" or whatever, then you get out of index errors for even looking. len should work, but remember that len counts the total number of things, but the list index always starts at zero, so if len spits back that there are "3 things in the list," then those three things are at locations 0, 1, and 2, not 1, 2, and 3, and looking for "my_list[3]" will throw back errors.

[trooper6]

You can put that hbox inside of the for loop.

[namastaii]

I know it starts at 0...

I don't really know how to explain what I'm doing XD

Okay I'll be more specific.

I have a list of daily tasks. The daily task list will change depending on factors in the story and choices the character makes. There is a little list screen in the game that shows the current tasks. The list will obviously not always be the same length. I'm just putting down the listed tasks on the screen but I am putting them on a bulleted list and I didn't want to look into anything too complex to code this so I just created separate hboxs on the screen that add an image of a bullet before each task (task[0], task[1], etc)

[trooper6]

I know it starts at 0...

I don't really know how to explain what I'm doing XD

Okay I'll be more specific.

I have a list of daily tasks. The daily task list will change depending on factors in the story and choices the character makes. There is a little list screen in the game that shows the current tasks. The list will obviously not always be the same length. I'm just putting down the listed tasks on the screen but I am putting them on a bulleted list and I didn't want to look into anything too complex to code this so I just created separate hboxs on the screen that add an image of a bullet before each task (task[0], task[1], etc)

Yeah, like I said, you can still use the for loop.

Something like:

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screen todo_screen():
    vbox:
        text "To Do List:"
        for item in my_list:
            hbox:
                add "bulletPoint.png"
                text ("[item]")

[namastaii]

Okay, I will try that when I can Thank you

[namastaii]

It works perfectly, Thanks

[namastaii]

I am however doing something wrong on my else statement. It gets ignored completely. I've tried rephrasing the if statements but even though those don't seem to have a problem.. else won't work. If I empty the list, it still doesn't work. If I start the game and don't add anything to the list, it doesn't work.

I just want it to say 'no tasks' when the list is empty

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frame style style.frame['black']:
                vbox:
                    if len(task_complete) >=0:
                        for item in task_complete:
                            hbox:
                                image "ui/bullet.png" ypos 10
                                text " "
                                text "[item]" style "taskcomplete_text"
               
                    if len(task) >=0:
                        for item in task:
                            hbox:
                                image "ui/bullet.png" ypos 10
                                text " "
                                text "[item]" style "tasklist_text"
                    else:
                        hbox:
                            text "No tasks." style "tasklist_text"

[Zetsubou]

I just want it to say 'no tasks' when the list is empty

Then stop using >= 0.
len() of an empty list is 0, so it will match your if statement.
In other words, change your >= to >.

[namastaii]

Oh I did. that just happened to be the last thing I tried. I tried > 0 and > -1 etc