Pep8

Author: Joeperdefloep

pandas/io/excel/_base.py

@@ -757,14 +757,22 @@ class ExcelWriter(metaclass=abc.ABCMeta):
     Here, the `if_sheet_exists` parameter can be set to replace a sheet if it
     already exists:
 
-    >>> with ExcelWriter("path_to_file.xlsx", mode="a", engine="openpyxl", if_sheet_exists="replace") as writer:
+    >>> with ExcelWriter(
+    ...     "path_to_file.xlsx",
+    ...     mode="a",
+    ...     engine="openpyxl",
+    ...     if_sheet_exists="replace"
+    ... ) as writer:
     ...     df.to_excel(writer, sheet_name="Sheet1")
 
     You can specify arguments to the underlying engine. For example to not
     calculate the result of a formula:
 
     >>> df = pd.DataFrame(["=1+1"])
-    ... with ExcelWriter("path_to_file.xlsx", engine_kwargs={"strings_to_formulas":False})
+    ... with ExcelWriter(
+    ...     "path_to_file.xlsx",
+    ...     engine_kwargs={"strings_to_formulas":False}
+    ... ) as writer:
     ...     df.to_excel(writer)
 
     You can store Excel file in RAM:

pandas/tests/io/excel/test_xlsxwriter.py

@@ -62,6 +62,10 @@ def test_write_append_mode_raises(ext):
         with pytest.raises(ValueError, match=msg):
             ExcelWriter(f, engine="xlsxwriter", mode="a")
 
+
 def test_engine_kwargs(ext):
+    # to test that kwargs are accurately passed on to the engine.
     with tm.ensure_clean(ext) as f:
-        ExcelWriter(f,engine="xlsxwriter",engine_kwargs={"strings_to_formulas":False})
+        ExcelWriter(
+            f, engine="xlsxwriter", engine_kwargs={"strings_to_formulas": False}
+        )