[Python] pandas ArrowInvalid message should include failing column name

[asfimport]

When writing a pandas dataframe to feather using its to_feather method, sometimes a single column's conversion fails in pandas_compat.convert_column, which leads the whole method to fail. The error message should include the name of the column that failed for easier debugging.

 

Eg instead of:

 

ArrowInvalid: Error converting from Python objects to String/UTF8: Got Python object of type int but can only handle these types: str, bytes.
 

Throw:

ArrowInvalid: Error converting from Python objects to String/UTF8: Got Python object of type int but can only handle these types: str, bytes. (column "user_id")

 

Originally opened on Github Issues: #2072

Reporter: Louis Potok / @louispotok
Assignee: Louis Potok / @louispotok

PRs and other links:

• GitHub Pull Request #2075

_{Note: This issue was originally created as ARROW-2626. Please see the migration documentation for further details.}

[asfimport]

Wes McKinney / @wesm:
Issue resolved by pull request 2075
#2075