#! /usr/bin/env python3
import markdown
from markdown.extensions.extra import ExtraExtension
from markdown.extensions.tables import TableExtension
text = '''
Try {}

A  |  B
---|---
a{}| b{}

'''
extra = ExtraExtension()
tables= TableExtension()
md = markdown.Markdown(extensions=[tables])
print( md.convert(text) ) # this is fine
print("\n\n")
md = markdown.Markdown(extensions=[tables, extra])
print( md.convert(text) ) # curly braces in the table are stripped

<p>Try {}</p>
<table>
<thead>
<tr>
<th>A</th>
<th>B</th>
</tr>
</thead>
<tbody>
<tr>
<td>a{}</td>  -- braces are there
<td>b{}</td>
</tr>
</tbody>
</table>
<p>Try {}</p>  -- these braces are preserved
<table>
<thead>
<tr>
<th>A</th>
<th>B</th>
</tr>
</thead>
<tbody>
<tr>
<td>a</td>  -- braces gone
<td>b</td>
</tr>
</tbody>
</table>