html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/pull/4998#issuecomment-790859794,https://api.github.com/repos/pydata/xarray/issues/4998,790859794,MDEyOklzc3VlQ29tbWVudDc5MDg1OTc5NA==,24736507,2021-03-04T19:11:20Z,2021-03-04T19:11:20Z,NONE,"Hello @jp-dark! Thanks for opening this PR. We checked the lines you've touched for [PEP 8](https://www.python.org/dev/peps/pep-0008) issues, and found:

* In the file [`xarray/backends/__init__.py`](https://github.com/pydata/xarray/blob/90a26175f2e39d06ec6dc06c35ca117e5bdea547/xarray/backends/__init__.py):

> [Line 12:1](https://github.com/pydata/xarray/blob/90a26175f2e39d06ec6dc06c35ca117e5bdea547/xarray/backends/__init__.py#L12): [F401](https://duckduckgo.com/?q=pep8%20F401) '.netCDF4_protocol.LazyNetCDF4DataStore' imported but unused
> [Line 20:1](https://github.com/pydata/xarray/blob/90a26175f2e39d06ec6dc06c35ca117e5bdea547/xarray/backends/__init__.py#L20): [F822](https://duckduckgo.com/?q=pep8%20F822) undefined name 'ExampleDataStore' in __all__



* In the file [`xarray/backends/backend_protocol.py`](https://github.com/pydata/xarray/blob/90a26175f2e39d06ec6dc06c35ca117e5bdea547/xarray/backends/backend_protocol.py):

> [Line 3:1](https://github.com/pydata/xarray/blob/90a26175f2e39d06ec6dc06c35ca117e5bdea547/xarray/backends/backend_protocol.py#L3): [F401](https://duckduckgo.com/?q=pep8%20F401) 'collections.defaultdict' imported but unused
> [Line 4:1](https://github.com/pydata/xarray/blob/90a26175f2e39d06ec6dc06c35ca117e5bdea547/xarray/backends/backend_protocol.py#L4): [F401](https://duckduckgo.com/?q=pep8%20F401) 'typing.Union' imported but unused
> [Line 71:1](https://github.com/pydata/xarray/blob/90a26175f2e39d06ec6dc06c35ca117e5bdea547/xarray/backends/backend_protocol.py#L71): [W391](https://duckduckgo.com/?q=pep8%20W391) blank line at end of file

* In the file [`xarray/backends/lazy_data_store.py`](https://github.com/pydata/xarray/blob/90a26175f2e39d06ec6dc06c35ca117e5bdea547/xarray/backends/lazy_data_store.py):

> [Line 2:1](https://github.com/pydata/xarray/blob/90a26175f2e39d06ec6dc06c35ca117e5bdea547/xarray/backends/lazy_data_store.py#L2): [F401](https://duckduckgo.com/?q=pep8%20F401) '..core.indexing.ExplicitIndexer' imported but unused

* In the file [`xarray/backends/netCDF4_protocol.py`](https://github.com/pydata/xarray/blob/90a26175f2e39d06ec6dc06c35ca117e5bdea547/xarray/backends/netCDF4_protocol.py):

> [Line 54:1](https://github.com/pydata/xarray/blob/90a26175f2e39d06ec6dc06c35ca117e5bdea547/xarray/backends/netCDF4_protocol.py#L54): [W293](https://duckduckgo.com/?q=pep8%20W293) blank line contains whitespace
> [Line 295:1](https://github.com/pydata/xarray/blob/90a26175f2e39d06ec6dc06c35ca117e5bdea547/xarray/backends/netCDF4_protocol.py#L295): [W293](https://duckduckgo.com/?q=pep8%20W293) blank line contains whitespace

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