ValueError: max() arg is an empty sequence

[SebastianDeLaile]

When running on this document (https://www.qao.qld.gov.au/sites/qao/files/annual-reports/annual_report_2016-17.pdf), when it reaches page 4, it throws the following ValueError:

import camelot
camelot.read_pdf(path, pages='3', flavor='stream')

Traceback (most recent call last):
File "", line 2, in
File "C:\Users\sdelail\AppData\Local\Continuum\anaconda3\envs\Financial_Extraction\lib\site-packages\camelot\io.py", line 117, in read_pdf
**kwargs
File "C:\Users\sdelail\AppData\Local\Continuum\anaconda3\envs\Financial_Extraction\lib\site-packages\camelot\handlers.py", line 172, in parse
p, suppress_stdout=suppress_stdout, layout_kwargs=layout_kwargs
File "C:\Users\sdelail\AppData\Local\Continuum\anaconda3\envs\Financial_Extraction\lib\site-packages\camelot\parsers\stream.py", line 458, in extract_tables
cols, rows = self._generate_columns_and_rows(table_idx, tk)
File "C:\Users\sdelail\AppData\Local\Continuum\anaconda3\envs\Financial_Extraction\lib\site-packages\camelot\parsers\stream.py", line 349, in _generate_columns_and_rows
ncols = max(set(elements), key=elements.count)
ValueError: max() arg is an empty sequence

Easy enough to capture with a try/except but thought I would pop it up here to let you know
Thanks for writing this package, excellent work!

[akshowhini]

@SebastianDeLaile That looks like the problem with 3rd page, may be because the page is image but not text

[vinayak-mehta]

Yep the 3rd page looks like an image.

[dimitern]

I had this exception also when there are no tables recognized

[amansani]

I have the same problem when there is only header and no data under it or when the tables are not recognized. Can someone tell us how to fix this. Thanks.

[amansani]

As a temporary fix, I added try exception blocks to skip the table when something occurs like this.

[baridhi]

I also faced this issue. I think I'm also going to work with a temporary fix using try-except block.