[Python] duration[arrow] support in pandas

[sergun]

Describe the usage question you have. Please include as many useful details as possible.

Is type duration[pyarrow] supported in pandas?

This piece of code creates pd.DataFrame with column "a" of type duration[pyarrow]:

from datetime import datetime
import pyarrow as pa
x = pa.table([[datetime.now()]], ["a"])
y = pa.table([[datetime.now()]], ["a"])
df = x.to_pandas(types_mapper=pd.ArrowDtype)-y.to_pandas(types_mapper=pd.ArrowDtype))
print(df.types)

a    duration[us][pyarrow]
dtype: object

But this line:

print(df["a"].dt.days)

raises exception:

AttributeError: Can only use .dt accessor with datetimelike values. Did you mean: 'at'?

Is it a bug or limited support of arrow types in pandas for now?

Component(s)

Python

[rohanjain101]

pandas-dev/pandas#52284

#33962

Seems like Timedelta accessor not supported with arrow backend yet since there aren't any arrow compute methods to extract Timedelta components.