ValBerthe edited a comment on issue #16172:
URL: https://github.com/apache/airflow/issues/16172#issuecomment-857692522
Downgrading `cattrs` doesn't seem to fix this issue.
Tried:
- 1.7.0
- 1.4.0
- 1.1.2
- 1.0.0
Stacktrace :
```
Traceback (most recent call last):
File
"/usr/local/lib/python3.8/dist-packages/airflow/models/taskinstance.py", line
1137, in _run_raw_task
self._prepare_and_execute_task_with_callbacks(context, task)
File
"/usr/local/lib/python3.8/dist-packages/airflow/models/taskinstance.py", line
1288, in _prepare_and_execute_task_with_callbacks
task_copy.pre_execute(context=context)
File "/usr/local/lib/python3.8/dist-packages/airflow/lineage/__init__.py",
line 186, in wrapper
self.inlets = [_render_object(i, context) for i in self.inlets if
attr.has(i)]
File "/usr/local/lib/python3.8/dist-packages/airflow/lineage/__init__.py",
line 186, in <listcomp>
self.inlets = [_render_object(i, context) for i in self.inlets if
attr.has(i)]
File "/usr/local/lib/python3.8/dist-packages/airflow/lineage/__init__.py",
line 74, in _render_object
return structure(
File "/usr/local/lib/python3.8/dist-packages/cattr/converters.py", line
223, in structure
# Classes to Python primitives.
File "", line 8, in structure_NoteBook
File "/usr/local/lib/python3.8/dist-packages/cattr/converters.py", line
439, in _structure_union
# optional with more than one parameter.
File "/usr/local/lib/python3.8/dist-packages/cattr/dispatch.py", line 47,
in _dispatch
return self._function_dispatch.dispatch(cl)
File "/usr/local/lib/python3.8/dist-packages/cattr/dispatch.py", line 121,
in dispatch
return handler(typ)
File "/usr/local/lib/python3.8/dist-packages/cattr/converters.py", line
711, in gen_structure_mapping
File "/usr/local/lib/python3.8/dist-packages/cattr/gen.py", line 353, in
make_mapping_structure_fn
val_handler = converter._structure_func.dispatch(val_type)
ValueError: not enough values to unpack (expected 1, got 0)
```
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