code: def mro_resolve(name, bases, dict):
    
  
    if name in dict:
      return dict[name]
    for base in bases:
      if hasattr(base, name):
        return getattr(base, name)
      try:
        return mro_resolve(name, base.__bases__, {})
      except KeyError:
        pass
    raise KeyError(name)
docs: Given a tuple of baseclasses and a dictionary that takes precedence
    over any value in the bases, finds a value with the specified *name*
    and returns it. Raises #KeyError if the value can not be found.