https://www.odoo.com/documentation/9.0/reference/views.html

In the above documentation we can see there is an attribute named "args" associated with button elements. But the document lacks more details about using this attribute. Instead it just says "see type". I tried to find the usage of this attribute by checking Odoo's core modules, but ends with no result.

1. Is it something we can use to pass the data from view file to python code?

2. What is the syntax? (key/value dict)

3. How to get access the passed data in Python?

4. What is the difference with args and context?
   

Any help would be appreciable!