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Backport PR #31017 on branch 1.0.x (REG: restore format_type attr) #31206

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Merged
merged 1 commit into from
Jan 22, 2020
Merged

Backport PR #31017 on branch 1.0.x (REG: restore format_type attr) #31206

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2 changes: 2 additions & 0 deletions pandas/io/pytables.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2474,6 +2474,7 @@ class Fixed:
"""

pandas_kind: str
format_type: str = "fixed" # GH#30962 needed by dask
obj_type: Type[Union[DataFrame, Series]]
ndim: int
encoding: str
Expand Down Expand Up @@ -3132,6 +3133,7 @@ class Table(Fixed):
"""

pandas_kind = "wide_table"
format_type: str = "table" # GH#30962 needed by dask
table_type: str
levels = 1
is_table = True
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10 changes: 10 additions & 0 deletions pandas/tests/io/pytables/test_store.py
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Expand Up @@ -64,6 +64,16 @@

@pytest.mark.single
class TestHDFStore:
def test_format_type(self, setup_path):
df = pd.DataFrame({"A": [1, 2]})
with ensure_clean_path(setup_path) as path:
with HDFStore(path) as store:
store.put("a", df, format="fixed")
store.put("b", df, format="table")

assert store.get_storer("a").format_type == "fixed"
assert store.get_storer("b").format_type == "table"

def test_format_kwarg_in_constructor(self, setup_path):
# GH 13291

Expand Down