There is a code
<div id="post-20629724_1128951" class="_post post page_block deep_active" data-post-id="-20629724_1128951" onclick="wall.postClick('-20629724_1128951', event);" post_view_hash="d6b48097f9db5c778b"> <div class="_post_content"> and XPATH request to it //*[@id="post-20629724_1128951"]
The question is what should be added to the request in order for the selenium to pull the attribute value out of the code (I might be wrong in the terminology) id, that is, to post-20629724_1128951