Traceback (most recent call last):


 "node2vec.py", line 58, in <module>

main()


 "node2vec.py", line 38, in main

optimizer = torch.optim.SparseAdam(model.parameters(), lr=args.lr)


 "/home/asouza/anaconda3/lib/python3.6/site-packages/torch/optim/sparse_adam.py", line 49, in __init__

super(SparseAdam, self).__init__(params, defaults)


 "/home/asouza/anaconda3/lib/python3.6/site-packages/torch/optim/optimizer.py", line 47, in __init__

raise ValueError("optimizer got an empty parameter list")
ValueError: optimizer got an empty parameter list
Traceback (most recent call last):


 "/Users/han/opt/anaconda3/envs/py37/lib/python3.7/site-packages/flask/app.py", line 2447, in wsgi_app

response = self.full_dispatch_request()


 "/Users/han/opt/anaconda3/envs/py37/lib/python3.7/site-packages/flask/app.py", line 1952, in full_dispatch_request

rv = self.handle_user_exception(e)


 "/Users/han/opt/anaconda3/envs/py37/lib/python3.7/site-packages/flask/app.py", line 1821, in handle_user_exception

reraise(exc_type, exc_value, tb)


 "/Users/han/opt/anaconda3/envs/py37/lib/python3.7/site-packages/flask/_compat.py", line 39, in reraise

raise value


 "/Users/han/opt/anaconda3/envs/py37/lib/python3.7/site-packages/flask/app.py", line 1950, in full_dispatch_request

rv = self.dispatch_request()


 "/Users/han/opt/anaconda3/envs/py37/lib/python3.7/site-packages/flask/app.py", line 1936, in dispatch_request

return self.view_functions[rule.endpoint](**req.view_args)


 "/Users/han/opt/anaconda3/envs/py37/lib/python3.7/site-packages/airflow/www/auth.py", line 34, in decorated

return func(*args, **kwargs)


 "/Users/han/opt/anaconda3/envs/py37/lib/python3.7/site-packages/airflow/www/decorators.py", line 97, in view_func

return f(*args, **kwargs)


 "/Users/han/opt/anaconda3/envs/py37/lib/python3.7/site-packages/airflow/www/decorators.py", line 60, in wrapper

return f(*args, **kwargs)


 "/Users/han/opt/anaconda3/envs/py37/lib/python3.7/site-packages/airflow/utils/session.py", line 65, in wrapper

return func(*args, session=session, **kwargs)


 "/Users/han/opt/anaconda3/envs/py37/lib/python3.7/site-packages/airflow/www/views.py", line 2042, in graph

dt_nr_dr_data = get_date_time_num_runs_dag_runs_form_data(request, session, dag)


 "/Users/han/opt/anaconda3/envs/py37/lib/python3.7/site-packages/airflow/www/views.py", line 156, in get_date_time_num_runs_dag_runs_form_data

.limit(num_runs)


 "/Users/han/opt/anaconda3/envs/py37/lib/python3.7/site-packages/sqlalchemy/orm/query.py", line 3373, in all

return list(self)


 "/Users/han/opt/anaconda3/envs/py37/lib/python3.7/site-packages/sqlalchemy/orm/loading.py", line 100, in instances

cursor.close()


 "/Users/han/opt/anaconda3/envs/py37/lib/python3.7/site-packages/sqlalchemy/util/langhelpers.py", line 70, in __exit__

with_traceback=exc_tb,


 "/Users/han/opt/anaconda3/envs/py37/lib/python3.7/site-packages/sqlalchemy/util/compat.py", line 182, in raise_

raise exception


 "/Users/han/opt/anaconda3/envs/py37/lib/python3.7/site-packages/sqlalchemy/orm/loading.py", line 80, in instances

rows = [proc(row) for row in fetch]


 "/Users/han/opt/anaconda3/envs/py37/lib/python3.7/site-packages/sqlalchemy/orm/loading.py", line 80, in <listcomp>

rows = [proc(row) for row in fetch]


 "/Users/han/opt/anaconda3/envs/py37/lib/python3.7/site-packages/sqlalchemy/orm/loading.py", line 588, in _instance

populators,


 "/Users/han/opt/anaconda3/envs/py37/lib/python3.7/site-packages/sqlalchemy/orm/loading.py", line 725, in _populate_full

dict_[key] = getter(row)


 "/Users/han/opt/anaconda3/envs/py37/lib/python3.7/site-packages/sqlalchemy/sql/sqltypes.py", line 1723, in process

return loads(value)
ValueError: unsupported pickle protocol: 5