diff options
Diffstat (limited to 'Lib/csv.py')
| -rw-r--r-- | Lib/csv.py | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Lib/csv.py b/Lib/csv.py index 309a8f3f486..4ef8be45ca9 100644 --- a/Lib/csv.py +++ b/Lib/csv.py @@ -139,7 +139,8 @@ class DictWriter: fieldnames = list(fieldnames) self.fieldnames = fieldnames # list of keys for the dict self.restval = restval # for writing short dicts - if extrasaction.lower() not in ("raise", "ignore"): + extrasaction = extrasaction.lower() + if extrasaction not in ("raise", "ignore"): raise ValueError("extrasaction (%s) must be 'raise' or 'ignore'" % extrasaction) self.extrasaction = extrasaction |