[ARROW-3700] [C++] CSV parser should allow ignoring empty lines

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.12.0
• Component/s: C++, Python
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/2883
• Assignee: Antoine Pitrou
• Reporter: Ultrabug
• Created: 04/Nov/18 23:19
• Updated: 11/Jan/23 07:29
• Resolved: 09/Nov/18 23:06

Description

This is a copy/paste of the github issue: https://github.com/apache/arrow/issues/2883

 

Hi,

I was playing with pyarrow.csv read_csv and found a rather strange behavior that I'm not sure is normal.

Parsing will fail if the delimiter of the CSV file is a comma and there's a blank line after the header (see basic_with_blank.csv example)

Example output:

{{{{Traceback (most recent call last): File "sorrow.py", line 14, in <module> table = pa_csv.read_csv(csv) File "pyarrow/_csv.pyx", line 198, in pyarrow._csv.read_csv File "pyarrow/error.pxi", line 81, in pyarrow.lib.check_status pyarrow.lib.ArrowInvalid: CSV parse error: Expected 2 columns, got 1 }}}}

If I change the CSV delimiter to semicolon, the error disappears and everything is fine!

I'm providing python code and CSV samples which compares with pandas (which does not suffer from this).

Hope this helps, thanks

Issue Links

• links to: GitHub Pull Request #2907