+ 运算符在这一行中做什么？

Question

我正在尝试修改现有模块中的方法以适应功能。 + 运算符在这一行中做什么？

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

Answer 1

你好M.E.,

解决方案

• 使用的运算符是 concatenation/combine 两个 List/String/Tupple。

例子

1. Plus(+) 运算符与两个 List

   一起使用

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

2. + 运算符与两个 String

   一起使用

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

3. + 运算符与两个元组一起使用

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

Answer 2

它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.