Unable to read merged column headers

[dr333]

This is a follow up of earlier issue#43 which was closed. All the details provided in #43 are the same, here is the updated information:

I upgraded tabula.py to use the latest jar (tabula-1.0.1-jar-with-dependencies.jar) and while it reduced these warnings, I still get some.

Aug 31, 2017 11:42:02 AM org.apache.pdfbox.pdmodel.font.PDTrueTypeFont
WARNING: Using fallback font 'LiberationSans' for 'TimesNewRomanPS-ItalicMT'
Aug 31, 2017 11:42:03 AM org.apache.pdfbox.pdmodel.font.PDTrueTypeFont
WARNING: Using fallback font 'LiberationSans' for 'TimesNewRomanPS-ItalicMT'
Aug 31, 2017 11:42:03 AM org.apache.pdfbox.pdmodel.font.PDTrueTypeFont
WARNING: Using fallback font 'LiberationSans' for 'TimesNewRomanPS-ItalicMT'

The main issue is that common cell headers donot get read in and not sure if the warnings are related. Please find the PDF file here: ufile.io/5xuti
You will see that common cell header in table of page 1 for instance ('Three Months Ended March 31') gets dropped.

[chezou]

Could you follow the issue template?

I think even if tabula-java can't solve to extract "common cell header". If tabula-java can, tabula-py convert it into DataFrame, and I think DataFrame can not handle combined cell.