Autodetect delimiter in CSV files, closes turicas#80

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 **Released on: (under development)**
 
+- Autodetect delimiter in CSV files
 - Fix StringIO import for Python 3
 - Fix error on import of older versions of urllib3
 - Export to TXT also support an already opened file

rows/plugins/csv.py

@@ -22,11 +22,17 @@
 from rows.plugins.utils import create_table, get_filename_and_fobj, serialize
 
 
-def import_from_csv(filename_or_fobj, encoding='utf-8', delimiter=',',
+def import_from_csv(filename_or_fobj, encoding='utf-8', delimiter=None,
                     quotechar='"', *args, **kwargs):
     'Import data from a CSV file'
 
     filename, fobj = get_filename_and_fobj(filename_or_fobj)
+
+    if delimiter is None:
+        dialect = unicodecsv.Sniffer().sniff(fobj.read())
+        delimiter = dialect.delimiter
+        fobj.seek(0)
+
     kwargs['encoding'] = encoding
     csv_reader = unicodecsv.reader(fobj, encoding=encoding,
                                    delimiter=str(delimiter),