code: def b(self, val):
      self["b"] = val
  
file_path: plotly.py/packages/python/plotly/plotly/graph_objs/layout/_margin.py
imports: from plotly.basedatatypes import BaseLayoutHierarchyType
  import copy
label_desc: Use image node_id 4 for calling the Margin obj's underlying member method code with example usage: obj.b(val) without return types