code: def visiblename(name, all=None, obj=None):
  
      
  
      # Certain special names are redundant or internal.
  
      # XXX Remove __initializing__?
  
      if name in {'__author__', '__builtins__', '__cached__', '__credits__',
  
                  '__date__', '__doc__', '__file__', '__spec__',
  
                  '__loader__', '__module__', '__name__', '__package__',
  
                  '__path__', '__qualname__', '__slots__', '__version__'}:
  
          return 0
  
      if name.endswith("_swigregister"):
          return 0
  
      if name.startswith("__swig"):
          return 0
  
      # Private names are hidden, but special names are displayed.
  
      if name.startswith('__') and name.endswith('__'): return 1
  
      # Namedtuples have public fields and methods with a single leading underscore
  
      if name.startswith('_') and hasattr(obj, '_fields'):
  
          return True
  
      if all is not None:
  
          # only document that which the programmer exported in __all__
  
          return name in all
  
      else:
  
          return not name.startswith('_')
docs: Decide whether to show documentation on a variable.