fixed pep8 issues

Author: lilyminium

xarray/backends/zarr.py

@@ -503,10 +503,11 @@ def get_chunk(name, var, chunks):
                 if isinstance(spec, (tuple, list)) and chunk_spec[dim]:
                     if any(s % chunk_spec[dim] for s in spec):
                         warnings.warn("Specified Dask chunks %r would "
-                            "separate Zarr chunk shape %r for dimension %r. "
-                            "This significantly degrades performance. "
-                            "Consider rechunking after loading."
-                            % (chunks[dim], chunk_spec[dim], dim))
+                                      "separate Zarr chunk shape %r for "
+                                      "dimension %r. This significantly "
+                                      "degrades performance. Consider "
+                                      "rechunking after loading instead."
+                                      % (chunks[dim], chunk_spec[dim], dim))
                 chunk_spec[dim] = chunks[dim]
         return chunk_spec
 

xarray/tests/test_backends.py

@@ -1409,11 +1409,11 @@ def test_manual_chunk(self):
 
                 assert_identical(actual, auto)
                 assert_identical(actual.load(), auto.load())
-    
+
     def test_warning_on_bad_chunks(self):
         original = create_test_data().chunk({'dim1': 4, 'dim2': 3, 'dim3': 5})
 
-        bad_chunks = (2, {'dim2':(3, 3, 2, 1)})
+        bad_chunks = (2, {'dim2': (3, 3, 2, 1)})
         for chunks in bad_chunks:
             kwargs = {'chunks': chunks}
             with pytest.warns(UserWarning):
@@ -1432,8 +1432,6 @@ def test_warning_on_bad_chunks(self):
                         assert v._in_memory == (k in actual.dims)
             assert len(record) == 0
 
-
-
     def test_deprecate_auto_chunk(self):
         original = create_test_data().chunk()
         with pytest.warns(FutureWarning):
@@ -1454,7 +1452,6 @@ def test_deprecate_auto_chunk(self):
                     # there should be no chunks
                     assert v.chunks is None
 
-
     def test_write_uneven_dask_chunks(self):
         # regression for GH#2225
         original = create_test_data().chunk({'dim1': 3, 'dim2': 4, 'dim3': 3})