[pre-commit.ci] auto fixes from pre-commit.com hooks

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Author: pre-commit-ci[bot]

pandas/tests/frame/methods/test_drop.py

@@ -347,11 +347,11 @@ def test_drop_multiindex_other_level_nan(self):
         tm.assert_frame_equal(result, expected)
 
     def test_drop_multiindex_with_axis_and_index(self):
-        df = DataFrame({'a': [1, 2, 3], 'b': ['foo', 'foo', 'bar']})
-        df = pd.concat([df], keys=['foo'], axis=1)
+        df = DataFrame({"a": [1, 2, 3], "b": ["foo", "foo", "bar"]})
+        df = pd.concat([df], keys=["foo"], axis=1)
         msg = "Cannot specify both 'axis' and 'index'"
         with pytest.raises(ValueError, match=msg):
-            df.drop(index='b', level=1, axis=1)
+            df.drop(index="b", level=1, axis=1)
 
     def test_drop_nonunique(self):
         df = DataFrame(