Is abstract class field in python possible?

How to make a class field [list] read-only in python?

• i have self.some_field = [] in my class Im enquiring is there a way to make this list read-only like a property?

• Answer:

  You need to make it, indeed, a property...: e.g., in __init__ self._some_field = [] and then later in the class's body: @property def some_field(self): return self._some_field Note that this does not make the list itself immutable: what will fail is an assignment like, say, self.some_field = 'bah' not the call of a mutator, like, say, self.some_field.append('blah') If you want to make the field immutable, it cannot be a list, by definition (since a list is a mutable sequence) -- it must be some other type of sequence (an immutable one) which you need to define for the purpose.