issue_comments: 1155815956

Yeah my initial implementation there makes no sense: python csv_reader_args = {"dialect": dialect} if delimiter: csv_reader_args["delimiter"] = delimiter if quotechar: csv_reader_args["quotechar"] = quotechar reader = _extra_key_strategy( csv_std.reader(decoded, **csv_reader_args), ignore_extras, extras_key ) first_row = next(reader) if no_headers: headers = ["untitled_{}".format(i + 1) for i in range(len(first_row))] reader = itertools.chain([first_row], reader) else: headers = first_row docs = (dict(zip(headers, row)) for row in reader) Because my _extra_key_strategy() helper function is designed to work against csv.DictReader - not against csv.reader() which returns a sequence of lists, not a sequence of dictionaries.

In fact, what's happening here is that dict(zip(headers, row)) is ignoring anything in the row that doesn't correspond to a header:

```pycon

list(zip(["a", "b"], [1, 2, 3])) [('a', 1), ('b', 2)] ```