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fixed bug where pd.NA was being cast to NaN during formatting #55754

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merged 13 commits into from
Nov 7, 2023
Merged

fixed bug where pd.NA was being cast to NaN during formatting #55754

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b648389
fixed bug where pd.NA was being cast to NaN during formatting
dominiquegarmier Oct 29, 2023
1efa677
implementing suggestion by Richard Shadrach
dominiquegarmier Oct 30, 2023
1c4d435
added test
dominiquegarmier Oct 31, 2023
331ea63
typo
dominiquegarmier Oct 31, 2023
560197d
Merge branch 'main' into main
dominiquegarmier Oct 31, 2023
b23a481
running pre-commit
dominiquegarmier Oct 31, 2023
518b12c
Merge branch 'main' of github.com:DominiqueGarmier/pandas
dominiquegarmier Oct 31, 2023
6017dcc
this is more efficient
dominiquegarmier Nov 1, 2023
722abaa
implemented using numpy
dominiquegarmier Nov 2, 2023
2520356
Merge branch 'main' into main
dominiquegarmier Nov 2, 2023
03b39d6
Merge branch 'main' into main
dominiquegarmier Nov 3, 2023
bf0d1b1
changed test size from 100 to 10
dominiquegarmier Nov 3, 2023
e7b7e02
Merge branch 'main' into main
dominiquegarmier Nov 3, 2023
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6 changes: 3 additions & 3 deletions pandas/io/formats/format.py
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Original file line number Diff line number Diff line change
Expand Up @@ -696,9 +696,9 @@ def _truncate_vertically(self) -> None:
assert self.max_rows_fitted is not None
row_num = self.max_rows_fitted // 2
if row_num >= 1:
head = self.tr_frame.iloc[:row_num, :]
tail = self.tr_frame.iloc[-row_num:, :]
self.tr_frame = concat((head, tail))
_len = len(self.tr_frame)
_slice = np.hstack([np.arange(row_num), np.arange(_len - row_num, _len)])
self.tr_frame = self.tr_frame.iloc[_slice]
else:
row_num = cast(int, self.max_rows)
self.tr_frame = self.tr_frame.iloc[:row_num, :]
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6 changes: 6 additions & 0 deletions pandas/tests/io/formats/test_format.py
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Expand Up @@ -171,6 +171,12 @@ def test_repr_truncation(self):
with option_context("display.max_colwidth", max_len + 2):
assert "..." not in repr(df)

def test_repr_truncation_preserves_na(self):
# https://github.com/pandas-dev/pandas/issues/55630
df = DataFrame({"a": [pd.NA for _ in range(10)]})
with option_context("display.max_rows", 2, "display.show_dimensions", False):
assert repr(df) == " a\n0 <NA>\n.. ...\n9 <NA>"

def test_max_colwidth_negative_int_raises(self):
# Deprecation enforced from:
# https://github.com/pandas-dev/pandas/issues/31532
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