code: def filter(self, f):
      self._filter = tuple(f)
      self.fshader["filter"] = self._filter
  
imports: from .base_filter import Filter
  from ..shaders import Function, Varying
  from ...color import colormap, Color
label_desc: Use image node_id 3 for calling the ColorFilter obj's underlying member method code with example usage: obj.filter(f) without return types