def receive(self, from_node, contexts, timestamp=0):
"""receive_data
1. Stores the information who sent what
2. Increase the hopcount when the context is a single context
>>> d = ContextAggregator()
>>> # two contexts are received
>>> r = d.receive(1, {Context(value=1.0, cohorts=[0,1,2]), Context(value=1.0, cohorts=[0,1,3])})
>>> same(d.get_received_data(1), [[0,1,2],[0,1,3]])
True
>>>
"""
contexts = Context.increase_hop_count(contexts)
self.input[from_node] = contexts
received_info = contexts_to_standard(contexts)
self.context_history.add_to_history(node_number=from_node, value=received_info, timestamp=timestamp)
