Find any possible sum from list elements, then if this sum are exist in list . show it by python program

Question

Please help me to find this logic for

Input : List=[1,3,4,2]
Output : [4,5,3,7,5,6,8,6,9,7]

Like =>
1+3=4
1+4=5
1+2=3
3+4=7
3+2=5
4+2=6
1+3+4=8
1+3+2=6
3+4+2=9
4+2+1=7

Answer 1

Somnath Barik ,

i have written some descriptions how this task can be done :

https://code.sololearn.com/cV3Ha8HkPUf4/?ref=app

Answer 2

Somnath Barik ,

from itertools you get the combinations as a tuple. so we can use the builtin function sum() for each tuple you get. this has to be done in a loop.

Answer 3

Somnath Barik ,

there are 2 possible ways how to create the tuples of numbers by using itertools permutations:
(1) - create all tuples and store them in one output list
- after that iterate through this list and check if the sum* of a tuple is also a number of the list

#(this is the preferred way in terms of memory consumption):
(2) - use a for loop to create the tuples one after an other
- use the tuple you get and check if the sum* of a tuple is also a number of the list
* = use the builtin function sum() together with the tuple

from itertools import permutations
lst = [1,3,4,2]
res = []
for count in range(2, len(lst)):
for sample in list(permutations(lst,count)):
# check if sum of the the tuple >sample< is a member of the list
# if yes: append the sum to the list >res<
print(res)

Answer 4

Somnath Barik ,

can you please show how the list is looking like? is it a list of list, or are the elements just individual numbers?

we also need the complete task description, if possible with input / output samples

Answer 5

Input : List=[1,3,4,2]

Output : [4,5,3,7,5,6,8,6,9,7]

Like =>
1+3=4
1+4=5
1+2=3
3+4=7
3+2=5
4+2=6
1+3+4=8
1+3+2=6
3+4+2=9
4+2+1=7

Answer 6

Then how to add each element?

Answer 7

Yes fast i also do that then i try with power set
Then create a two dimensional list then i do sum of different elements
but how to extract main elements from the list ?

We can remove one subset from the set???

Answer 8

What do you think you need to do?
Break it down into steps.
1) You'll need to iterate through a lost.
2) You'll need to add one list item to another.
and...?