Help with Python (my attempt included)?

Question

• Objective:

- Write a python code to remove all the duplicate items from a list.

• Example:

- input : [2,2, 3,3,4,4,5,6,7]
- output: [2,3,4,5,6,7]

• My try: https://code.sololearn.com/ctqBEp8oI536

Answer 1

To make it clear: set() does not preserve the given order of a list.

lst = [1,2,7,3,1,5,9,1,0,2,4]
# print(set(lst))
# result is {0, 1, 2, 3, 4, 5, 7, 9} this is not preserving order !

res = []
[res.append(i) for i in lst if i not in res]
print(res) # result is: [1, 2, 7, 3, 5, 9, 0, 4] this is correct: the evaluation is running from left to right

Answer 2

Hello and welcome to sololearn

We can't do work homeworks here so you have to show your attempt so that we may help you :)

What you have to do just paste your code here

https://www.sololearn.com/post/75089/?ref=app

https://www.sololearn.com/discuss/333866/?ref=app

Answer 3

I've edited your question to include your attempt.

Answer 4

Though You should show us your attempt first..
However, Hint(with most simple syntax according to me):
s=list(input())
#Use it with list.count
It gives the number of times a particular item occurs in a list...
# Use if-else statements with it and for loops...

Answer 5

Sahil Aujla
Yes, you have to show us your attempt before asking us to do your project.You could have asked "How to remove duplicate items in a list" and you have given sample input and output..
Often, "write a program" these words are considered as homework or assignment. Learn the way for asking questions.
Take care for this next time.

Answer 6

Sahil Aujla , your code is perfect! 👍

Answer 7

Sahil Aujla , see the answer to your question in the attached file:
https://code.sololearn.com/ct4FURuoVboH/?ref=app

Answer 8

꧁༒Rishabh༒꧂ actually i am learning python because it's my passion it's not a subject in my school....so i have no homework or assignments for it.... but yes i agree with you that my way of asking question was not right....

Answer 9

Use dict.fromkeys() to preserve ordering:
mylist = [9, 9, 10, 2, 3, 10, 3, 8, 4, 9, 4, 5, 5, 6, 7, 7]
mylist = list(dict.fromkeys(mylist))
print(mylist)

Answer 10

Sahil Aujla
He is a platinum moderator.
Moderators can edit or delete your question. They are the members of the community who maintain sololearn guidelines. They have much powers so, that they can maintain the guidelines throughout sololearn
https://www.sololearn.com/discuss/1110689/?ref=app
https://www.sololearn.com/discuss/1668682/?ref=app
https://www.sololearn.com/discuss/869582/?ref=app
https://www.sololearn.com/discuss/420352/?ref=app
https://www.sololearn.com/discuss/625730/?ref=app
https://www.sololearn.com/discuss/2361498/?ref=app
https://www.sololearn.com/discuss/306394/?ref=app

Answer 11

Sahil Aujla Fox is a platinum moderator and and plat mods have the power to edit any question if they feel it's against the community rules and guidelines.

https://www.sololearn.com/Moderator-Guidelines
https://www.sololearn.com/Moderator-Code-of-Ethics

Answer 12

rodwynnejones , really nice code and a good idea to do the task in this way! 👍

Answer 13

Fox thank you so much..... now it really looks cool😊.... but how could you edit the question asked by me?

Answer 14

Mansi 👑 suael I want the order of the numbers to be same [2,3,4,5,6,7] but ysing set() will not give it because order does not matter in set().... so the duplicate items would be removed but the order will not be same by using set(). let's find some other way

Answer 15

suael no order is not preserved I tried it...... order is not preserved

Answer 16

Lothar yes you are absolutely right.... but also check out my code for doing the same thing. However your code is more simple.

https://code.sololearn.com/ctqBEp8oI536/?ref=app

Answer 17

rodwynnejones what is the function of .fromkeys()

Answer 18

꧁༒Rishabh༒꧂ Nilesh ok now I got it...

Answer 19

Nilesh ꧁༒Rishabh༒꧂ I was not knowing that I am supposed to show my attempt also..... sorry for that

Answer 20

Order is preserved , u gotta respect the intelligence of python. ..python knows what output you are expecting ;)