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BUG 55136: add test #63020

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BUG 55136: add test #63020

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17 changes: 17 additions & 0 deletions pandas/tests/dtypes/test_dtypes.py
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Original file line number Diff line number Diff line change
@@ -1,3 +1,5 @@
from contextlib import redirect_stdout
import io
import re
import warnings
import weakref
Expand Down Expand Up @@ -1259,3 +1261,18 @@ def test_categorical_nan_no_dtype_conversion():
expected = pd.DataFrame({"a": Categorical([1], [1]), "b": [1]})
df.loc[0, "a"] = np.array([1])
tm.assert_frame_equal(df, expected)


def test_dt_to_pydatetime_conversion():
expected = "datetime"

df = pd.DataFrame({"ts": [pd.Timestamp("2024-01-01 12:00:00").as_unit("ns")]})
df["ts"] = df.ts.dt.to_pydatetime()
assert df["ts"].dtype == expected

buffer = io.StringIO()
with redirect_stdout(buffer):
df.info()

output = buffer.getvalue()
assert expected in output
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