How do we get an optional class attribute in Python?
python
Solution
You can use `hasattr` and `getattr`.
For example:
hasattr(foo, 'bar')
would return `True` if `foo` has an attribute named `bar`, otherwise `False` and
getattr(foo, 'bar', 'quux')
would return `foo.bar` if it exists, otherwise defaults to `quux`.
Problem
For dictionary we can use `.get` method. What about a class's attribute and provide a default value?