grpc stream剖析

    i = 0   #新增
    def ListFeatures(self, request, context):
        global i #新增
        i = i + 1  #新增
        print(i)  #新增

        left = min(request.lo.longitude, request.hi.longitude)
        right = max(request.lo.longitude, request.hi.longitude)
        top = max(request.lo.latitude, request.hi.latitude)
        bottom = min(request.lo.latitude, request.hi.latitude)

        y=0  #新增
        for feature in self.db:
            y = y+1  #新增
            print(y)  #新增
            if (feature.location.longitude >= left and
                    feature.location.longitude <= right and
                    feature.location.latitude >= bottom and
                    feature.location.latitude <= top):
                yield feature

def guide_list_features(stub):
    rectangle = route_guide_pb2.Rectangle(
        lo=route_guide_pb2.Point(latitude=400000000, longitude=-750000000),
        hi=route_guide_pb2.Point(latitude=420000000, longitude=-730000000))
    print("Looking for features between 40, -75 and 42, -73")

    features = stub.ListFeatures(rectangle)
    i=0  #新增

    for feature in features:
        i = i+1  #新增
        if i > 10:  #新增
          break  #新增

        print("get No.:%d" % i)
        print("Feature called %s at %s" % (feature.name, feature.location))