Remove duplicates from Array string

Question

It's really childish to ask this question but really want an optimal solution for this. I have an array of string

("a1,a2", "a3,a4", "a2,a1", "a5,a3")

and I want to Display

("a1,a2", "a3,a4", "a5,a3")

i.e. the first string is in, its duplicates are omitted.

Note: the order of the elements must be preserved

Possible duplicate of Remove duplicates in a list while keeping its order (Python) — Umair Ayub
– Umair Ayub, Commented Sep 9, 2019 at 8:24

Rakesh · Accepted Answer · 2019-09-09 08:31:05Z

3

This is one approach.

Ex:

data =  ("a1,a2","a3,a4","a2,a1","a5,a3") 
seen = set()
result = []
for i in data:
    if ",".join(sorted(i.split(","))) not in seen:
        result.append(i)
        seen.add(i) 
print(result)

Output:

['a1,a2', 'a3,a4', 'a5,a3']

edited Sep 9, 2019 at 8:31

answered Sep 9, 2019 at 8:23

Rakesh

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3 Comments

Pynchia Over a year ago

the inner list (the one inside set) is unnecessary

Sharath Nayak Over a year ago

I forgot to add about the "order" in the question. Actually order is required. Thank you for the answer. will try the answer.

Rakesh Over a year ago

@SharathNayak. Updated snippet

moe asal · Accepted Answer · 2019-09-09 10:10:37Z

0

your data is in a variable called "data".

new_data = []
for example in data:
    example2 = str(example.split(",")[1] + "," + example.split(",")[0])
    if example in new_data or example2 in new_data:
        continue 
    else:
        new_data.append(example) 
print(new_data)

If you want to store them in your original list, run this script.

data.clear()
data = new_data.copy()

edited Sep 9, 2019 at 10:10

answered Sep 9, 2019 at 8:37

moe asal

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