import grpc
import common_pb2
import market_data_pb2_grpc
def stream_bbo():
channel = grpc.secure_channel('mds.qfex.com:443', grpc.ssl_channel_credentials())
stub = market_data_pb2_grpc.MarketDataServiceStub(channel)
for bbo in stub.GetBbo(common_pb2.Empty()):
print(bbo)
if **name** == '**main**':
stream_bbo()