title: Data container with numeric field names
body: <p>Is there a way in python to create a data container with numeric field names?</p>
  <p>A minimal example: I have variables called <code>beta0</code>, <code>beta1</code>, <code>beta2</code> and would like to pack them into a container <code>beta</code> and access them by <code>beta.0</code>, <code>beta.1</code>, <code>beta.2</code>.</p>
  <p>I checked <code>recordclass</code>, <code>namedtuple</code>, and <code>dataclass</code>, but none of them allows this.</p>
  <p>EDIT: What is the best practice in python for treating a bunch of related parametres?</p>