How to get a specific item from python list

Question

class Barcode:

    def __init__(self, code, code_id = None):
        self.code = code
        self.id = code_id

I have a list of barcodes. How can I get a barcode with a specific id?

Also, would you consider using a dict of id=>barcode to store the codes instead of a list? — Mad Physicist, Aug 10 '16 at 11:19
each id is unique generated using uuid.uuid4().hex , I just want to get it from the list : select barcode where barcode.id =something — Gaith Mtiri, Aug 10 '16 at 11:23
Use a dict. This is a terrible use for a list. Also, consider using new-style classes. I doubt you should even be using Python 2, but you certainly should not be using it with old-style classes. — Two-Bit Alchemist, Aug 10 '16 at 12:19

score -1 · Accepted Answer · edited May 23 '17 at 12:08

-1

If your BarcodeList isn't sorted, I recommend the brutal approach:

def find_item(id):
    for item in BarcodeList:
        if item.id == id:
            return item

PS: Why not use dict? It's born for doing this sort of job.

edited May 23 '17 at 12:08

Community

answered Aug 10 '16 at 12:25

nalzok

@Mitch I don't think this is an *obvious* duplicate, since the list is not necessary sorted. When it comes to the case where it's not sorted, can you provide a better approach? The brutal approach is added just for completeness. – nalzok Aug 10 '16 at 13:25
@Mitch Well, your answer is better, and I really think you should post an answer here. – nalzok Aug 10 '16 at 13:53
@Mitch You're right. Seems that answers below that question can help this OP a lot. Close vote cast. – nalzok Aug 10 '16 at 13:58

1 Answers1