What does + operator do in this line?

Question

I am trying to modify a method in an existing module to adapt functionality. What does + operator do in this line?

for line in payment.move_line_ids + expense_sheet.account_move_id.line_ids:

Answer 1

Hello M.E.,

Solution

• operator of use is concatenation/combine of two List/String/Tupple.

Example

1. Plus(+) Operator use with two List

   a = [1,2,3]
   b = [4,5]
   print a + b
   output = [1,2,3,4,5]

2. + operator use with two String

   a = "Vora"
   b = " mayur"
   print a + b
   output = "vora mayur"

3. + operator use with two tupple

   a = (1,2,3)
   b = (4,5)
   print a + b
   output = (1,2,3,4,5)

Answer 2

It concatenates account.move.line records from payment.move_line_ids and expense_sheet.account_move_id.line_ids into a single recordset, which is then iterated over. Please note that the result of the __add__ (+) operation might contain duplicates if the same account.move.line is present in both operands. If you want to avoid duplicates, use the | (OR) operator.