code: def GetNumberCols(self):
      return len(self.v.column_names)
  
imports: import wx
  import wx.grid
  from cellprofiler_core.preferences import get_error_color
  from cellprofiler_core.setting import Table
label_desc: Use image node_id 9 for calling the TableController obj's underlying member method code with example usage: obj.GetNumberCols() and returns: len