DEPR: Disallow kwargs in ExcelWriter (pandas-dev#49463)

doc/source/whatsnew/v2.0.0.rst

@@ -277,6 +277,7 @@ Removal of prior version deprecations/changes
 - Removed ``pandas.SparseSeries`` and ``pandas.SparseDataFrame``, including pickle support. (:issue:`30642`)
 - Enforced disallowing passing an integer ``fill_value`` to :meth:`DataFrame.shift` and :meth:`Series.shift`` with datetime64, timedelta64, or period dtypes (:issue:`32591`)
 - Enforced disallowing a string column label into ``times`` in :meth:`DataFrame.ewm` (:issue:`43265`)
+- Enforced disallowing the use of ``**kwargs`` in :class:`.ExcelWriter`; use the keyword argument ``engine_kwargs`` instead (:issue:`40430`)
 - Enforced disallowing a tuple of column labels into :meth:`.DataFrameGroupBy.__getitem__` (:issue:`30546`)
 - Enforced disallowing setting values with ``.loc`` using a positional slice. Use ``.loc`` with labels or ``.iloc`` with positions instead (:issue:`31840`)
 - Enforced disallowing ``dict`` or ``set`` objects in ``suffixes`` in :func:`merge` (:issue:`34810`)

pandas/io/excel/_base.py

@@ -947,12 +947,6 @@ class ExcelWriter(metaclass=abc.ABCMeta):
         * odswriter: ``odf.opendocument.OpenDocumentSpreadsheet(**engine_kwargs)``
 
         .. versionadded:: 1.3.0
-    **kwargs : dict, optional
-        Keyword arguments to be passed into the engine.
-
-        .. deprecated:: 1.3.0
-
-            Use engine_kwargs instead.
 
     Notes
     -----
@@ -1093,17 +1087,7 @@ def __new__(
         storage_options: StorageOptions = None,
         if_sheet_exists: Literal["error", "new", "replace", "overlay"] | None = None,
         engine_kwargs: dict | None = None,
-        **kwargs,
     ) -> ExcelWriter:
-        if kwargs:
-            if engine_kwargs is not None:
-                raise ValueError("Cannot use both engine_kwargs and **kwargs")
-            warnings.warn(
-                "Use of **kwargs is deprecated, use engine_kwargs instead.",
-                FutureWarning,
-                stacklevel=find_stack_level(),
-            )
-
         # only switch class if generic(ExcelWriter)
         if cls is ExcelWriter:
             if engine is None or (isinstance(engine, str) and engine == "auto"):
@@ -1235,7 +1219,6 @@ def __init__(
         storage_options: StorageOptions = None,
         if_sheet_exists: str | None = None,
         engine_kwargs: dict[str, Any] | None = None,
-        **kwargs,
     ) -> None:
         # validate that this engine can handle the extension
         if isinstance(path, str):

pandas/tests/io/excel/test_odswriter.py

@@ -19,25 +19,6 @@ def test_write_append_mode_raises(ext):
             ExcelWriter(f, engine="odf", mode="a")
 
 
-def test_kwargs(ext):
-    # GH 42286
-    # GH 43445
-    # test for error: OpenDocumentSpreadsheet does not accept any arguments
-    kwargs = {"kwarg": 1}
-    with tm.ensure_clean(ext) as f:
-        msg = re.escape("Use of **kwargs is deprecated")
-        error = re.escape(
-            "OpenDocumentSpreadsheet() got an unexpected keyword argument 'kwarg'"
-        )
-        with pytest.raises(
-            TypeError,
-            match=error,
-        ):
-            with tm.assert_produces_warning(FutureWarning, match=msg):
-                with ExcelWriter(f, engine="odf", **kwargs) as _:
-                    pass
-
-
 @pytest.mark.parametrize("engine_kwargs", [None, {"kwarg": 1}])
 def test_engine_kwargs(ext, engine_kwargs):
     # GH 42286

pandas/tests/io/excel/test_openpyxl.py

@@ -86,19 +86,6 @@ def test_write_cells_merge_styled(ext):
         assert xcell_a2.font == openpyxl_sty_merged
 
 
-@pytest.mark.parametrize("iso_dates", [True, False])
-def test_kwargs(ext, iso_dates):
-    # GH 42286 GH 43445
-    kwargs = {"iso_dates": iso_dates}
-    with tm.ensure_clean(ext) as f:
-        msg = re.escape("Use of **kwargs is deprecated")
-        with tm.assert_produces_warning(FutureWarning, match=msg):
-            with ExcelWriter(f, engine="openpyxl", **kwargs) as writer:
-                assert writer.book.iso_dates == iso_dates
-                # ExcelWriter won't allow us to close without writing something
-                DataFrame().to_excel(writer)
-
-
 @pytest.mark.parametrize("iso_dates", [True, False])
 def test_engine_kwargs_write(ext, iso_dates):
     # GH 42286 GH 43445

pandas/tests/io/excel/test_writers.py

@@ -1337,21 +1337,6 @@ def assert_called_and_reset(cls):
             df.to_excel(filepath, engine="dummy")
         DummyClass.assert_called_and_reset()
 
-    @pytest.mark.parametrize(
-        "ext",
-        [
-            pytest.param(".xlsx", marks=td.skip_if_no("xlsxwriter")),
-            pytest.param(".xlsx", marks=td.skip_if_no("openpyxl")),
-            pytest.param(".ods", marks=td.skip_if_no("odf")),
-        ],
-    )
-    def test_engine_kwargs_and_kwargs_raises(self, ext):
-        # GH 40430
-        msg = re.escape("Cannot use both engine_kwargs and **kwargs")
-        with pytest.raises(ValueError, match=msg):
-            with ExcelWriter("", engine_kwargs={"a": 1}, b=2):
-                pass
-
 
 @td.skip_if_no("xlrd")
 @td.skip_if_no("openpyxl")

pandas/tests/io/excel/test_xlsxwriter.py

@@ -1,5 +1,4 @@
 import contextlib
-import re
 import warnings
 
 import pytest
@@ -65,17 +64,6 @@ def test_write_append_mode_raises(ext):
             ExcelWriter(f, engine="xlsxwriter", mode="a")
 
 
-@pytest.mark.parametrize("nan_inf_to_errors", [True, False])
-def test_kwargs(ext, nan_inf_to_errors):
-    # GH 42286
-    kwargs = {"options": {"nan_inf_to_errors": nan_inf_to_errors}}
-    with tm.ensure_clean(ext) as f:
-        msg = re.escape("Use of **kwargs is deprecated")
-        with tm.assert_produces_warning(FutureWarning, match=msg):
-            with ExcelWriter(f, engine="xlsxwriter", **kwargs) as writer:
-                assert writer.book.nan_inf_to_errors == nan_inf_to_errors
-
-
 @pytest.mark.parametrize("nan_inf_to_errors", [True, False])
 def test_engine_kwargs(ext, nan_inf_to_errors):
     # GH 42286