[jira] [Created] (ARROW-5540) pa.lib.tzinfo_to_string(tz) throws ValueError: Unable to convert timezone `tzoffset(None, -14400)` to string

["Michał Kujawski (JIRA)" <ji...@apache.org>]

Michał Kujawski created ARROW-5540:
--------------------------------------

             Summary: pa.lib.tzinfo_to_string(tz) throws ValueError: Unable to convert timezone `tzoffset(None, -14400)` to string
                 Key: ARROW-5540
                 URL: https://issues.apache.org/jira/browse/ARROW-5540
             Project: Apache Arrow
          Issue Type: Bug
            Reporter: Michał Kujawski


*Overview:*

When trying to save DataFrame to parquet error is thrown while parsing a column with the following properties:

 
{code:java}
dtype: datetime64[ns, tzoffset(None, -14400)]
dtype.tz: tzoffset(None, -14400)
{code}
 

 

*Error:* 
{code:java}
ValueError: Unable to convert timezone `tzoffset(None, -14400)` to string{code}
 

*Error stack:*
{code:java}
File "pyarrow/table.pxi", line 1139, in pyarrow.lib.Table.from_pandas
File "/home/koojav/projects/toptal/teftel/.venv/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line 480, in dataframe_to_arrays
types)
File "/home/koojav/projects/toptal/teftel/.venv/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line 209, in construct_metadata
field_name=sanitized_name)
File "/home/koojav/projects/toptal/teftel/.venv/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line 153, in get_column_metadata
string_dtype, extra_metadata = get_extension_dtype_info(column)
File "/home/koojav/projects/toptal/teftel/.venv/lib/python3.6/site-packages/pyarrow/pandas_compat.py", line 126, in get_extension_dtype_info
metadata = {'timezone': pa.lib.tzinfo_to_string(dtype.tz)}
File "pyarrow/types.pxi", line 1149, in pyarrow.lib.tzinfo_to_string
ValueError: Unable to convert timezone `tzoffset(None, -14400)` to string
{code}
*Libraries:*
 * pandas 0.24.2
 * pyarrow 0.13.0



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