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fix: Convert MultiIndex columns to string representation #1672

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fix: Convert MultiIndex columns to string representation #1672

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2 changes: 1 addition & 1 deletion src/ydata_profiling/model/pandas/dataframe_pandas.py
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Original file line number Diff line number Diff line change
Expand Up @@ -32,5 +32,5 @@ def pandas_preprocess(config: Settings, df: pd.DataFrame) -> pd.DataFrame:
df = rename_index(df)

# Ensure that columns are strings
df.columns = df.columns.astype("str")
df.columns = df.columns.map(str)
return df
20 changes: 20 additions & 0 deletions tests/unit/test_multiindex_columns.py
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@@ -0,0 +1,20 @@
import pandas as pd
import pytest

from ydata_profiling import ProfileReport


@pytest.fixture()
def df():
df = pd.DataFrame(
{
("foo", "one"): [1, 2, 3],
("bar", "two"): [4, 5, 6],
}
)
return df


def test_multiindex_columns(df: pd.DataFrame):
profile_report = ProfileReport(df, title="Test Report", progress_bar=False)
assert len(profile_report.to_html()) > 0