Limit the number of empty header row values

Default is 5.

Author: istride

src/tablib/formats/_ods.py

@@ -127,7 +127,7 @@ def repeat(cell):
             if not row_vals:
                 continue
             if i == skip_lines and headers:
-                dset.headers = row_vals
+                dset.headers = limit_row(row_vals)
             else:
                 if i > skip_lines:
                     if len(row_vals) < dset.width:
@@ -255,3 +255,18 @@ def detect(cls, stream):
             return True
         except Exception:
             return False
+
+
+def limit_row(headers, limit=5):
+    """Limits the number of trailing empty row values"""
+    limited = []
+    count = 0
+
+    for v in headers:
+        limited += [v]
+        count = count + 1 if v == "" else 0
+
+        if count == limit:
+            break
+
+    return limited

tests/test_tablib.py

@@ -1260,7 +1260,7 @@ def test_ods_import_set_ragged(self):
         ods_source = Path(__file__).parent / 'files' / 'ragged.ods'
         with ods_source.open('rb') as fh:
             dataset = tablib.Dataset().load(fh, 'ods')
-        self.assertEqual(dataset[0], (1, '', True) + ('',) * 16381)
+        self.assertEqual(dataset[0], (1, '', True) + ('',) * 6)
 
     def test_ods_import_columns_repeated(self):
         ods = Path(__file__).parent / "files" / "columns_repeated.ods"