def __init__(self, data_model=None):
if data_model is None:
self.data_model = DataModel.new()
else:
self.data_model = data_model
self.connection_set = ConnectionSet(self.data_model)
self.node_types = {}
def from_json(file_name, data_model_type='dict'):
'''
Import a network from a JSON file using the nio library.
'''
data_model = DataModel.new(data_model_type)
network = Network(data_model)
data = nio.read(file_name)
nodes = data.get('nodes', None)
if nodes is not None:
network.data_model.insert('nodes', nodes)
types = data.get('types', None)
if types is not None:
network.types = types
connections = data.get('connections', None)
if connections is not None:
network.connection_set.add_list(connections)
return network
