How do I convert html tables in my notebook to PDF?

[Braun Brelin]

Hi, 

I have a jupyter note book that has a number of cells with embedded HTML tables that look like this:

<table width='750px', align='left'>

<tr>

<td>

<p style='font-family:courier'>

some text here

</p>

</td>

</tr>

</table>

When I run jupyter nbconvert --to pdf mynotebook.ipynb it fails to render the HTML tables at all. 

I end up with text that looks like:

apache: # ID declaration pkg: # state declaration - installed # function declaration

Rather than a table with one element that has three spaced lines in it. 

I'm running this on an Ubuntu 14.04 system.  

Any help appreciated. 

 

[Steve Spicklemire]

I think markdown works for tables.

thanks,

-steve

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[Braun Brelin]

Unfortunately, it doesn't make any difference.  It doesn't seem to recognize the <table> </table> element and just displays the table contents directly. 

On Sat, Feb 18, 2017 at 10:48 PM, Steve Spicklemire <stevespi...@gmail.com> wrote:

I think markdown works for tables.

thanks,

-steve

On Feb 18, 2017, at 4:32 PM, Braun Brelin <bbr...@gmail.com> wrote:

Hi, 

I have a jupyter note book that has a number of cells with embedded HTML tables that look like this:

<table width='750px', align='left'>

<tr>

<td>

<p style='font-family:courier'>

some text here

</p>

</td>

</tr>

</table>

When I run jupyter nbconvert --to pdf mynotebook.ipynb it fails to render the HTML tables at all. 

I end up with text that looks like:

apache: # ID declaration pkg: # state declaration - installed # function declaration

Rather than a table with one element that has three spaced lines in it. 

I'm running this on an Ubuntu 14.04 system.  

Any help appreciated. 

 

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[Steve Spicklemire]

Did you try using markdown rather than HTML?

| Colum 1 | Column 2 |
|------------------------------------|-----------------------------------|
| Thing 1 | Thing 2 |
| Thing 3 | Think 4 |

That works for me.

-steve

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[Braun Brelin]

Yes, but I've got lots and lots of these tables in lots of cells.  I don't really want to have to manually convert my html tables to markdown format.  Besides, isn't markdown supposed to be a superset of HTML?  

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[Damon Allen]

Besides, isn't markdown supposed to be a superset of HTML?  

You can think of markdown as a subset of HTML.  You won't be able to use the specify the width, like in your example and if you have merged cells you won't be able to duplicate it using Markdown.  There was some initial work on a library that would support Latex and HTML tables a couple years back (https://github.com/takluyver/tabipy) but it's a complicated process trying to support two separate encodings with all the different approaches.  The automatic conversion of HTML tables to Latex is something I've wanted to be added to nbconvert for a long time but I've never found the time to write a converter.

With regards to converting HTML tables to Markdown, if you're tables are simple enough to use Markdown then you can use a Python script to partially automate the conversion.

In a new cell copy the HTML copy for one of your tables and assign it to the variable txt in the code below and you should be able to create a Markdown table equivalent.  Admittedly this code only works with clean, simple HTML tables.  Also, if you are not familiar with regular expressions and would like to try to improve the code you can check out http://regexr.com/.

import re

txt = """your table code
more of your table code
"""

rows = re.compile(r'(?:<tr>)(.?)(?:</tr>)')
headers = re.compile(r'(?:<th>)(.*?)(?:</th>)')
cells = re.compile(r'(?:<td>)(.?)(?:</td>)')

table_data = []
table_text = txt.replace('\n','')
for row in rows.findall(table_text):
    row_content = headers.findall(row)
    if len(row_content)==0:
       row_content = cells.findall(row)
    table_data.append(row_content)

markdown_text = ''
for index, row in enumerate(table_data):
    markdown_text += '|'+'|'.join(row)+'|\n'
    if index == 0:
        markdown_text+='|'+'|'.join(['----']*len(row))+'|\n'
print(markdown_text)

[Tony Hirst]

I started exploring using pytablewriter ( https://github.com/thombashi/pytablewriter ) to generate markdown tables, but ended up instead opting for pandas .to_html() to generate tabular output for an output slidedeck.

--tony

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