Why can objects of classes that require an id (where it isn't optional) be created without specifying an id?

[sanjayankur31]

An example is Population, which derives from Base, which means it requires an id. However, I can still run:

pop0 = Population()
pop1 = Population()

neither of them have ids---why is this? Should we be assigning them ids by default, or is something off in nml.py that is allowing this, or are we checking for ids later during validation?

[sanjayankur31]

Another related question is: should we be able to define multiple objects with the same id? For python, these are different objects, but for NeuroML, they'll have the same ids?

pop0 = Population(id="1")
pop1 = Population(id="2")

[sanjayankur31]

it's perfectly acceptable for users to create empty objects and add ids later, so at the moment we're not going to make it compulsory to add an id right at the time of creation.