def add(self, obj):
if self.closed:
raise eimaginary.Closed(self, obj)
containedWeight = self.getContents().getColumn("weight").sum()
if containedWeight + obj.weight > self.capacity:
raise eimaginary.DoesntFit(self, obj)
assert self.thing is not None
obj.location = self.thing
def remove(self, obj):
if self.closed:
raise eimaginary.Closed(self, obj)
if obj.location is self.thing:
obj.location = None