Hi,

Context

Context is a dictionary carrying session data. Context can be used in the server or the client side. In your view you can add new values like this:

<button name="apply" context="{'key': value}" />

and get this value in the server side like this:

value = self.env.context.get('key')

attrs

attrs is a dictionary carrying some field option like invisible, required and readonly. attrs allow you to define condition for each option like this:

  <field name="name" attrs="{'invisible': [('condition', '=', True)]}">

The field name will be invisible if condition is true.

Best regards.