node_Viewer.py

def update(self):
    global cache_viewer_baker
    cache_viewer_baker[self.name+'v'] = []
    cache_viewer_baker[self.name+'ep'] = []
    cache_viewer_baker[self.name+'m'] = []

    inputs = self.inputs

    if not all([x in inputs for x in ['vertices', 'edg_pol', 'matrix']]):
        return

    def links_and_socket_type(input_name, socket_type):
        links = inputs[input_name].links
        if not links:
            return
        b = isinstance(links[0].from_socket, socket_type)
        return links and b

    draw_able = any([inputs[x].links for x in ['vertices', 'matrix']])

    if self.activate and draw_able:
        callback_disable(self.name)

        vert_data, edge_poly_data, matrix_data = [], [], []

        if links_and_socket_type('vertices', VerticesSocket):
            propv = SvGetSocketAnyType(self, inputs['vertices'])
            vert_data = dataCorrect(propv)

        if links_and_socket_type('edg_pol', StringsSocket):
            prope = SvGetSocketAnyType(self, inputs['edg_pol'])
            edge_poly_data = dataCorrect(prope)

        if links_and_socket_type('matrix', MatrixSocket):
            propm = SvGetSocketAnyType(self, inputs['matrix'])
            matrix_data = dataCorrect(propm)

        cache_viewer_baker[self.name+'v'] = vert_data
        cache_viewer_baker[self.name+'ep'] = edge_poly_data
        cache_viewer_baker[self.name+'m'] = matrix_data

    else:
        callback_disable(self.name)

    if cache_viewer_baker[self.name+'v'] or cache_viewer_baker[self.name+'m']:
        callback_enable(self.name, cache_viewer_baker[self.name+'v'], cache_viewer_baker[self.name+'ep'], \
            cache_viewer_baker[self.name+'m'], self.Vertex_show, self.color_view, self.transparant, self.shading)

        self.use_custom_color=True
        self.color = (1,0.3,0)
    else:
        self.use_custom_color=True
        self.color = (0.1,0.05,0)
        #print ('отражения вершин ',len(cache_viewer_baker['v']), " рёбёры ", len(cache_viewer_baker['ep']), "матрицы",len(cache_viewer_baker['m']))
    if not self.inputs['vertices'].links and not self.inputs['matrix'].links:
        callback_disable(self.name)
        cache_viewer_baker = {}

nice all()