def add_prop(self, *, prop: PropertyBase) -> None:
"""
Add a property to this context. An error message will be generated, if a property with
the same name has already been added previously.
* `prop`: The property object that should be added.
"""
if prop.id() in self._properties:
logger.error(f"Attempt to add property {prop.id()} twice!")
return
with self._lock:
# register property
self._properties[prop.id()] = prop
# register all of the property's signals
for signal in prop.signals():
self._add_sig(signal)
def rm_prop(self, *, prop: PropertyBase) -> None:
"""
Remove a property from this context.
Generates error message, if the property was not added with add_prop() to the context previously
* `prop`: The property to remove.object
"""
if prop.id() not in self._properties:
logger.error(f"Attempt to remove unknown property {prop.id()}!")
return
# remove property from context
self._properties.pop(prop.id())
states_to_remove: Set[State] = set()
with self._lock:
# remove all of the property's signals
for signal in prop.signals():
self._rm_sig(signal)
# remove all states that depend upon property
for st in self._activations_per_state:
if prop.id() in st.read_props + st.write_props:
states_to_remove.add(st)
for st in states_to_remove:
self.rm_state(st=st)
