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[BUG] Modify concatenate_columns ignore_empty output #1166

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[BUG] Modify concatenate_columns ignore_empty output #1166

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41025d8
Modify ignore_empty output
Fu-Jie Sep 8, 2022
d74a829
Modify ignore_empty output
Fu-Jie Sep 8, 2022
f012b9d
solve doc format
Fu-Jie Sep 8, 2022
adaaf36
Update AUTHORS.md
Fu-Jie Sep 13, 2022
30c1f3c
Update janitor/functions/concatenate_columns.py
Fu-Jie Sep 13, 2022
a25d983
Update concatenate_columns.py
Fu-Jie Sep 14, 2022
1423129
Merge branch 'dev' into solve-ignore-empty
ericmjl Nov 3, 2022
08fe78c
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Nov 3, 2022
a29a463
Merge branch 'dev' into solve-ignore-empty
samukweku Nov 28, 2022
66ea4c0
Update CHANGELOG.md
samukweku Nov 28, 2022
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1 change: 1 addition & 0 deletions AUTHORS.md
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Expand Up @@ -109,3 +109,4 @@ Contributors
- [@ethompsy](https://github.com/ethompsy) | [contributions](https://github.com/pyjanitor-devs/pyjanitor/issues?q=is%3Aclosed+mentions%3Aethompsy)
- [@apatao](https://github.com/apatao) | [contributions](https://github.com/pyjanitor-devs/pyjanitor/issues?q=is%3Aclosed+mentions%3Aapatao)
- [@OdinTech3](https://github.com/OdinTech3) | [contributions](https://github.com/pyjanitor-devs/pyjanitor/pull/1094)
- [@Fu-Jie](https://github.com/Fu-Jie) | [contributions](https://github.com/pyjanitor-devs/pyjanitor/pulls?q=is%3Aclosed+mentions%3AFu-Jie)
1 change: 1 addition & 0 deletions CHANGELOG.md
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Expand Up @@ -21,6 +21,7 @@
- [ENH] Enable `encode_categorical` handle 2 (or more ) dimensions array. PR #1153 @Zeroto521
- [ENH] Faster computation for a single non-equi join, with a numba engine. Issue #1102 @samukweku
- [INF] Cancel old workflow runs via Github Action `concurrency`. PR #1161 @Zeroto521
- [BUG] Modify ignore_empty output in `concatenate_columns`. PR #1164 @Fu-Jie

## [v0.23.1] - 2022-05-03

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6 changes: 5 additions & 1 deletion janitor/functions/concatenate_columns.py
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Expand Up @@ -51,8 +51,12 @@ def concatenate_columns(
if len(column_names) < 2:
raise JanitorError("At least two columns must be specified")

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df = df.copy() # avoid mutating original data
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df[new_column_name] = (
df[column_names].astype(str).fillna("").agg(sep.join, axis=1)
df[column_names]
.astype("string")
.fillna("")
.agg(sep.join, axis=1)
)

if ignore_empty:
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2 changes: 1 addition & 1 deletion tests/functions/test_concatenate_columns.py
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Expand Up @@ -28,7 +28,7 @@ def test_concatenate_columns_null_values(missingdata_df):
new_column_name="index",
ignore_empty=True,
)
expected_values = ["1.0-1", "2.0-2", "nan-3"] * 3
expected_values = ["1.0-1", "2.0-2", "3"] * 3
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Please also update the docstrings for the test.

assert expected_values == df["index"].tolist()


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I also think it might be worth writing a test merging a custom dataframe with a float column (NaN), a datetime column (NaT) and a string column (None/NA?).

And assert the expected output accordingly.

Then, mention this PR or the attached issue in the test docstring as well, please.

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