Method invert_technosphere_matrix crashes with multi LCA

[thomasgibon]

Hi all,

I think the assert check in the invert_technosphere_matrix method in lca_base.py should also include the case of multi LCA.

If that's correct, this row

brightway2-calc/bw2calc/lca_base.py

Line 248 in f5d9d7e

assert hasattr(self, "inventory"), "Must do lci first"

should be replaced by

        assert hasattr(self, "inventory") or hasattr(self, "inventories"), "Must do lci first"

In theory, the technosphere is unique even for a multi LCA, so this makes sense, right?

Thanks in advance for feedback/clarification :)

[cmutel]

Fix released in 2.0.2