Traceback (most recent call last):


 "/Users/ryan/.virtualenvs/ge-13/lib/python3.8/site-packages/great_expectations/data_context/util.py", line 84, in instantiate_class_from_config

class_instance = class_(**config_with_defaults)


 "/Users/ryan/.virtualenvs/ge-13/lib/python3.8/site-packages/great_expectations/data_context/store/expectations_store.py", line 133, in __init__

super().__init__(


 "/Users/ryan/.virtualenvs/ge-13/lib/python3.8/site-packages/great_expectations/data_context/store/store.py", line 42, in __init__

self._store_backend = instantiate_class_from_config(


 "/Users/ryan/.virtualenvs/ge-13/lib/python3.8/site-packages/great_expectations/data_context/util.py", line 86, in instantiate_class_from_config

raise TypeError(
TypeError: Couldn't instantiate class : DatabaseStoreBackend with config :

Traceback (most recent call last):



 "<ipython-input-2-62b765e41418>", line 1, in <module>

runfile('C:/Users/Fariha/Desktop/MS/CervCancer/tensorflow-resnet-master/wth.py', wdir='C:/Users/Fariha/Desktop/MS/CervCancer/tensorflow-resnet-master')



 "C:\Users\Fariha\Anaconda3\envs\py36\lib\site-packages\spyder\utils\site\sitecustomize.py", line 710, in runfile

execfile(filename, namespace)



 "C:\Users\Fariha\Anaconda3\envs\py36\lib\site-packages\spyder\utils\site\sitecustomize.py", line 101, in execfile

exec(compile(f.read(), filename, 'exec'), namespace)



 "C:/Users/Fariha/Desktop/MS/CervCancer/tensorflow-resnet-master/wth.py", line 76, in <module>

image_tensor = sess.run(error)



 "C:\Users\Fariha\Anaconda3\envs\py36\lib\site-packages\tensorflow\python\client\session.py", line 789, in run

run_metadata_ptr)



 "C:\Users\Fariha\Anaconda3\envs\py36\lib\site-packages\tensorflow\python\client\session.py", line 984, in _run

self._graph, fetches, feed_dict_string, feed_handles=feed_handles)



 "C:\Users\Fariha\Anaconda3\envs\py36\lib\site-packages\tensorflow\python\client\session.py", line 410, in __init__

self._fetch_mapper = _FetchMapper.for_fetch(fetches)



 "C:\Users\Fariha\Anaconda3\envs\py36\lib\site-packages\tensorflow\python\client\session.py", line 227, in for_fetch

(fetch, type(fetch)))

TypeError: Fetch argument None has invalid type <class 'NoneType'>
