diff options
Diffstat (limited to 'Lib/csv.py')
| -rw-r--r-- | Lib/csv.py | 6 |
1 files changed, 5 insertions, 1 deletions
@@ -92,7 +92,7 @@ register_dialect("excel-tab", excel_tab) class DictReader: - def __init__(self, f, fieldnames, restkey=None, restval=None, + def __init__(self, f, fieldnames=None, restkey=None, restval=None, dialect="excel", *args, **kwds): self.fieldnames = fieldnames # list of keys for the dict self.restkey = restkey # key to catch long rows @@ -104,6 +104,10 @@ class DictReader: def next(self): row = self.reader.next() + if self.fieldnames is None: + self.fieldnames = row + row = self.reader.next() + # unlike the basic reader, we prefer not to return blanks, # because we will typically wind up with a dict full of None # values |