a list is given arr = [2, 1, 10, 5] Write a function with a for loop that sums all the numbers in the list with each other The result should be this: (2+1)+(2+10)+(2+5)+(1+10)+(1+5)+(10+5) = 54

#create a list
arr = [2, 1, 10, 5]

def sum_from_list(arr):
  result = []
  for idx, num in enumerate(arr):
    for idx_2, num_2 in enumerate(arr):
      if idx_2 > idx:
        result.append(num + num_2)
  return result
  
sum_from_list(arr)