List of Strings to List of Integers?

Hi all,

I have a seemingly simple problem, but have been unable to find a solution. I have a list of 4918 items, all of which are strings (either "A," "B," or "C"). I'd like to convert this list into a list of integers of "1," "2," or "3," where all items that are "A" become 1, "B" become 2, etc. I will then associate these values with an accompanying list of lines.

Below is an image to help clarify. I've also attached the script. (Note: I left the GHPython component empty after several failed attempts at case conversion.)

Thanks in advance for your help.

Cheers,

/SPM

Attachments:

strList_to_intList_SPM.gh, 20 KB

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Replies to This Discussion

Permalink Reply by djordje on November 1, 2014 at 1:46pm

Hi Stephen,

You can add an integer values to a new list based on values from the strList:

a = []
for item in strList:
    if item == "A":
        newItem = 1
    elif item == "B":
        newItem = 2
    else:
        newItem = 3
    a.append(newItem)

What went wrong at your place?

Permalink Reply by Stephen Maher on November 1, 2014 at 1:56pm

Hi Djordje,

Thanks for the quick reply and for the code. I'm not sure what happened, to tell you the truth. I tried a very similar approach, but attempted to create three separate lists (one for each item type), but it didn't work out.

It makes more sense to create one master list then create sublists using another conditional loop.

Thanks again,

/SPM

Permalink Reply by ng5 Alex on November 1, 2014 at 2:09pm