I’ve got 4 groups each with 2 subgroups
I want to add, “cat” to index[1][1]
How do I do this? I’ve tried various ways but nothing seems to work!
I’ve also tried insert.
Looks like the first method is working - instead of building an empty list define it as a single string and see what you get.
Not sure I follow.
I want n lists each with 2 sublists… Then I want to add things to those specific lists.
How’s that work with a string?
hello, I think you should use extend rather than append, Mr. Poupin posted a message a few days ago that I’m a computer user, I’m researching
Edit:
Cordially
christian.stan
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Hi @Alien
There is problem with your list (at initialization /construction), see this post
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Here is
Groups=[[[],[]]]*4
Groups[1][1].extend([[],'cat'])
OUT = Groups
Thank you for the regular contributions of knowledge Mr. Poupin
cordially
christian.stan
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You have added ‘cat’ to every list, not into the sublist.
I want ‘cat’ to appear in one list at a specific index.
Ok I’m a real babache, I’ll take a closer look at Mr. Poupin’s post
cordially
christian.stan
This is doning hat I hink you’re asking for.
Instead of an empty list, put a variable in each list to confirm.
I clarified my answer just before you pressed send 
See my post above.
Don’t define groups as *4 of the same list; it looks like you’re duplicating the items in memory so the alterations are duplicating as well.
So:
groups = [ [ [1], [2] ], [ [3],[4] ], [ [5],[6] ], [ [7], [8] ] ]
That’d be an issue because I want n groups.
Not specifically 4 every time.
Then don’t define by it *4.
groups = []
[ groups.append([ [],[] ]) for i in range(n) ]
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