Christopher Brooks created ARROW-3030:
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Summary: from_pandas() does not respect dtype==category
Key: ARROW-3030
URL: https://issues.apache.org/jira/browse/ARROW-3030
Project: Apache Arrow
Issue Type: Bug
Components: Python
Affects Versions: 0.10.0
Reporter: Christopher Brooks
While troublehsooting ARROW-2966 I updated my pandas dataframe with more type
information. Specifically, I changed some mixed type columns to categorical
instead of object. I assumed that the Table.from_pandas() would inspect the
pandas type information and respect that when converting it over to a table. It
doesn't seem to.
For instance, I expected this code to work, but it throws the same
ArrowTypeError as ARROW-2966.
{code:java}
import pandas as pd
import pyarrow as pa
import numpy as np
df=pd.DataFrame.from_dict({"col":[0,1,2,3,""]},dtype="category")
tb = pa.Table.from_pandas(df, columns=["col"])
{code}
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