| | 10 | It would be easy to implement using the overloading of '+' already present in class Quantity. I suggest something like this if addition is True: |
| | 11 | |
| | 12 | def set_quantity(quantity_name, x, addition=False): |
| | 13 | ... |
| | 14 | if addition is True: |
| | 15 | #create new temporary quantity |
| | 16 | Q = Quantity(domain) |
| | 17 | Q.set_values(x) |
| | 18 | |
| | 19 | quantities[quantity_name] += Q |
| | 20 | |
| | 21 | |
| | 22 | |
| | 23 | Alternatively, we could make this behaviour the default as quantities are initialised as zero, and have a keyword 'replace'. |
| | 24 | On the other hand, this could be confusing whenever a code needs to change a quantity. |
| | 25 | |
| | 26 | |
| | 27 | |
| | 28 | |
