BUG: Raise ValueError when the format kwarg is passed to the HDFStore constructor

Author: CianciuStyles

doc/source/whatsnew/v0.24.0.rst

@@ -1492,6 +1492,7 @@ Notice how we now instead output ``np.nan`` itself instead of a stringified form
 - Bug in :func:`DataFrame.to_string()` that broke column alignment when ``index=False`` and width of first column's values is greater than the width of first column's header (:issue:`16839`, :issue:`13032`)
 - Bug in :func:`DataFrame.to_string()` that caused representations of :class:`DataFrame` to not take up the whole window (:issue:`22984`)
 - Bug in :func:`DataFrame.to_csv` where a single level MultiIndex incorrectly wrote a tuple. Now just the value of the index is written (:issue:`19589`).
+- :func:`HDFStore` will raise ``ValueError`` when the ``format`` kwarg is passed to the constructor (:issue:`13291`)
 - Bug in :meth:`HDFStore.append` when appending a :class:`DataFrame` with an empty string column and ``min_itemsize`` < 8 (:issue:`12242`)
 - Bug in :func:`read_csv()` in which memory leaks occurred in the C engine when parsing ``NaN`` values due to insufficient cleanup on completion or error (:issue:`21353`)
 - Bug in :func:`read_csv()` in which incorrect error messages were being raised when ``skipfooter`` was passed in along with ``nrows``, ``iterator``, or ``chunksize`` (:issue:`23711`)

pandas/io/pytables.py

@@ -458,6 +458,10 @@ class HDFStore(StringMixin):
 
     def __init__(self, path, mode=None, complevel=None, complib=None,
                  fletcher32=False, **kwargs):
+
+        if 'format' in kwargs:
+            raise ValueError('format is not a defined argument for HDFStore')
+
         try:
             import tables  # noqa
         except ImportError as ex:  # pragma: no cover

pandas/tests/io/test_pytables.py

@@ -146,6 +146,11 @@ def teardown_method(self, method):
 @pytest.mark.filterwarnings("ignore:\\nPanel:FutureWarning")
 class TestHDFStore(Base):
 
+    def test_format_kwarg_in_constructor(self):
+        # GH 13291
+        with ensure_clean_path(self.path) as path:
+            pytest.raises(ValueError, HDFStore, path, format='table')
+
     def test_context(self):
         path = create_tempfile(self.path)
         try: