def test_annex_one(api_reader: UNFCCCApiReader):
>       ans = api_reader.annex_one_reader.query(party_codes=["DEU"], gases=["N₂O"])

unfccc_di_api/tests/test_unfccc_di_api.py:25: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
unfccc_di_api/unfccc_di_api.py:438: in query
    df = self._parse_raw_answer(
unfccc_di_api/unfccc_di_api.py:488: in _parse_raw_answer
    "measure": self.measure_tree[variable["measureId"]].tag,
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <treelib.tree.Tree object at 0x7fdceba0f880>, key = 19496

    def __getitem__(self, key):
        """Return _nodes[key]"""
        try:
            return self._nodes[key]
        except KeyError:
>           raise NodeIDAbsentError("Node '%s' is not in the tree" % key)
E           treelib.exceptions.NodeIDAbsentError: Node '19496' is not in the tree