weakref_property_simple

PlasmaCalcs.tools.properties.weakref_property_simple(internal_attr, doc=None)

defines a property which behaves like the value it contains, but is actually a weakref.

stores internally at internal_attr. Also set self.{internal_attr}_is_weakref = True.

Setting the value actually creates a weakref. Getting the value calls the weakref.

Note: if failing to create weakref due to TypeError,

(e.g. “TypeError: cannot create weak reference to ‘int’ object”)

then just store the value itself. Also set self.{internal_attr}_is_weakref = False.