do not require return value for intervention function
@@ -367,7 +367,7 @@ class Sim(cvb.BaseSim):
for intervention in self['interventions']:
intervention.apply(self)
if self['interv_func'] is not None: # Apply custom intervention function
- self =self['interv_func'](self)
+ self['interv_func'](self)
flows = people.update_states_post(flows) # Check for state changes after interventions
