Why is the tsv.FinalBackslashInFieldIs Forbidden?

[SunYanCN]

I have a tsv file named '1.tsv' like this.
1 2\ 1

It is 1TAB2\TAB1 .

when I use this code:

if __name__ == '__main__':
    input_file = '1.tsv'
    with Stream(input_file) as stream:
        for row in stream:
            print(row)

I get a error.

Traceback (most recent call last):
  File "/home/band/band/base.py", line 168, in <module>
    with Stream(input_file) as stream:
  File "/root/anaconda3/envs/tf20/lib/python3.6/site-packages/tabulator/stream.py", line 163, in __enter__
    self.open()
  File "/root/anaconda3/envs/tf20/lib/python3.6/site-packages/tabulator/stream.py", line 275, in open
    self.__extract_sample()
  File "/root/anaconda3/envs/tf20/lib/python3.6/site-packages/tabulator/stream.py", line 474, in __extract_sample
    row_number, headers, row = next(self.__parser.extended_rows)
  File "/root/anaconda3/envs/tf20/lib/python3.6/site-packages/tabulator/parsers/tsv.py", line 64, in __iter_extended_rows
    for row_number, item in enumerate(items, start=1):
  File "/root/anaconda3/envs/tf20/lib/python3.6/site-packages/tsv.py", line 44, in un
    columns = next(rows, None)
  File "/root/anaconda3/envs/tf20/lib/python3.6/site-packages/tsv.py", line 66, in parse_lines
    values = parse_line(line)
  File "/root/anaconda3/envs/tf20/lib/python3.6/site-packages/tsv.py", line 73, in parse_line
    return [parse_field(s) for s in line.split('\t')]
  File "/root/anaconda3/envs/tf20/lib/python3.6/site-packages/tsv.py", line 73, in <listcomp>
    return [parse_field(s) for s in line.split('\t')]
  File "/root/anaconda3/envs/tf20/lib/python3.6/site-packages/tsv.py", line 98, in parse_field
    raise FinalBackslashInFieldIsForbidden
tsv.FinalBackslashInFieldIsForbidden

[SunYanCN]

def parse_field(s):
    o = ''
    if s == '\\N':
        return None
    before, sep, after = s.partition('\\')
    while sep != '':
        o += before
        if after == '':
            raise FinalBackslashInFieldIsForbidden
        if after[0] in escapes:
            o += escapes[after[0]]
            before, sep, after = after[1:].partition('\\')
        else:
            before, sep, after = after.partition('\\')
    else:
        o += before
        return o

Maybe this function get this error.

[roll]

@SunYanCN
Thanks, seems a bug

[SunYanCN]

Are there any new developments on this issue? @roll

[roll]

@SunYanCN
Not yet

BTW I don't really understand the reason for this exception. Whey is FinalBackslashInFieldIs Forbidden? I would create a question on the tsv issue tracker first (and actually I don't see we can fix it on the tabulator level anyway)

Are you interested in leading this investigation?

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[roll]

Closing as it needs to be created for https://github.com/solidsnack/tsv if it's still actual