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biology = ["Sarah", "Ahmed", "Fred", "Gillian", "Shradah", "Max", "Max", "Sara", "Max", "Esther"]

computerScience = ["Sarah", "John", "Fred", "Gillian", "Jermaine", "Max", "Sara", "Juan", "Esther"]

english = ["Nico", "Sharjeel", "Isabella", "Taylor", "Ali", "Ali", "Jean-Baptiste", "Jean-Baptiste", "Jean-Baptiste", "William"]


setThing=set()
for word in biology:
  setThing.add(word)

listThing=[]

for word in setThing:
  listThing.append(word)

print(listThing)

In this, I am trying to take the list called biology and put it in a set so that it gets rid of the repeats. I am trying to turn it back into a list that has the same order of names as the list: biology. But when I turned it into a set, the order of the names completely changed. Is there any way I could use some kind of function to order either the new set or the new list so that the names are in the same order as the original "biology" list?

CubeTastick N
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  • sets are not ordered, unlike dicts: https://stackoverflow.com/questions/45581901/are-sets-ordered-like-dicts-in-python3-6 – Lesiak Oct 07 '20 at 13:49
  • have a look at `unique_everseen` in the [itertools recipes](https://docs.python.org/3/library/itertools.html?highlight=unique_everseen#itertools-recipes). – hiro protagonist Oct 07 '20 at 13:50
  • You can use: `[lst[i] for i in set([lst.index(i) for i in lst])]` - where `lst` is `biology`. This basically creates a list of indexes and populates the new list based on the item's index in the old list. – S3DEV Oct 07 '20 at 14:08

1 Answers1

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Use

biology  = list(dict.fromkeys(biology))

This will remove duplicates in order and return the unique elements in a list

abdulsaboor
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