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feat: add pyarrow.Table support #487

Merged
merged 16 commits into from
Nov 25, 2024
Merged

feat: add pyarrow.Table support #487

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e627865
Add PyArrow.Table support
amol- Oct 5, 2024
a80a2f7
format
amol- Oct 5, 2024
6477bcb
Update substitutions too
amol- Oct 5, 2024
e6c057a
Update test for set_cell
amol- Oct 5, 2024
ed8e8e0
Update function signature
amol- Oct 5, 2024
e501880
Few typing fixes
amol- Oct 5, 2024
d40040b
Consolidate set_cell immutability behavior
amol- Oct 9, 2024
d3cdd1c
Snapshot test for backends
amol- Oct 9, 2024
e7e9f4e
Use comparing types can use is operator
amol- Oct 9, 2024
e4a2964
Put back empty line wrongly removed by snapshot update
amol- Oct 9, 2024
ccbf413
Limit scope of changes
amol- Oct 11, 2024
38e1286
Increase test coverage and fix group_splits
amol- Oct 17, 2024
492ee51
Test ChunkedArray
amol- Oct 17, 2024
8b9b8de
Cover to_list
amol- Oct 17, 2024
cce64de
Merge branch 'main' into pyarrow
machow Nov 25, 2024
ef41328
dev: warn that pyarrow support is experimental
machow Nov 25, 2024
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5 changes: 3 additions & 2 deletions great_tables/_gt_data.py
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,7 @@
copy_data,
create_empty_frame,
get_column_names,
_get_column_dtype,
n_rows,
to_list,
validate_frame,
Expand Down Expand Up @@ -173,7 +174,7 @@ def render_formats(self, data_tbl: TblData, formats: list[FormatInfo], context:
# TODO: I think that this is very inefficient with polars, so
# we could either accumulate results and set them per column, or
# could always use a pandas DataFrame inside Body?
_set_cell(self.body, row, col, result)
self.body = _set_cell(self.body, row, col, result)
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Thanks for spending time working through this quirk in the formatter 😬

What if we did this for now?:

  • if _set_cell returns something that is not None, we set it to self.body
  • We restore the original behavior of _set_cell returning None for pandas and polars, and mutating them (just to ensure this PR stays scoped to pyarrow).
  • After merging, I can open an issue to refactor this bit of code so it works columnwise (rather than on each individual row, col cell)

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sounds a reasonable approach


return self

Expand Down Expand Up @@ -323,7 +324,7 @@ def align_from_data(self, data: TblData):
# a Pandas DataFrame or a Polars DataFrame
col_classes = []
for col in get_column_names(data):
dtype = data[col].dtype
dtype = _get_column_dtype(data, col)

if dtype == "object":
# Check whether all values in 'object' columns are strings that
Expand Down
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