code: def _expand_ctx_item(item):
      if isinstance(item, tuple):
          explanation = item[0]
          selector = item[1]
      else:
          explanation = item
          selector = explanation.selector
  
      if selector is not None:
          df = selector.copy()
          df.reset_index(inplace=True, drop=True)
          df["id"] = df.index
          df *= 1
      else:
          df = None
  
      return (explanation, df)
  
file_path: interpret/python/interpret-core/interpret/visual/_udash.py
imports: import dash
  from dash import html
  from dash import dcc
  from dash import dash_table
  import dash_cytoscape
  from dash.dependencies import Input, Output
  import dash.development.base_component
  from pandas.core.generic import NDFrame
  from plotly import graph_objs
  import logging
label_desc: Use image node_id 5 for calling a global function with example usage: _expand_ctx_item(item) and returns: explanation,  df