brightway

Add output product to a new activity

I understand that a new activity can be added to a database via

a = db.new_activity(
    code="A",
    name="New activity"
    )

a.save()

I can add an exchange to the newly created activity via

a.new_exchange(
    amount=1,
    input=db.random(),
    type="technosphere",
).save()

However, the newly created activity will not "create" a product. How do I assign an existing or new reference product to a new activity?

enter image description here

Solution 
  • db = bd.Database('someDataBase')
db.new_node(code="code", name="name", unit="kilogram", location="CN").save()

# this should do it but your ref product will be set to None
# if you want that

act = db.get('code')
act['reference product'] = 'whatever'
act.save()

# now if you add a production exchange it will also keep the ref product
act.new_edge(input=act, amount=1, type='production')

    There is probably a better way to do it, this works for me.