Compare two different lists [Solved]

[Suwamoto]

Hi >w< Let's say I got two different lists which look like this:

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    list1 = [
        ("bird", 5),
        ("dog", 2)
        ]
    
    list2 = [
        ("bird", 3, 5),
        ("lurch", 4, 4)
        ]

And I want to compare them and figure out if there are fields that got the same name. In this example, it would be "bird".
I have been doing that with a double for loop until now, which looks like this.

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    for list1name, list1number in list1:
        for list2name, list2number, list2amount in list2:
            if list1name == list2name:
                # Do something

So I was wondering if there are any more efficient ways to do this? >w<

[pwisaguacate]

This is a way to check to see if list1 and list2 shares one or more same first values of each tuple:

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    $ similar = [ a[0] for a, b in zip(list1, list2) if a[0] == b[0] ]
    $ result = similar != []

The variable similar becomes a list of shared first value. It is then checked to see if it's blank or not.

To be honest, I got help in a chat because I'm bad at lists. If anyone can write a function, that would be neat. (Apparently I can't into real functions either.)

Heck, you can turn the whole thing into a one-liner if you don't need the new list itself:

Code: Select all

    $ similar = [ a[0] for a, b in zip(list1, list2) if a[0] == b[0] ] != []