code: def asbool(s):
      
      if s is None:
          return False
      if isinstance(s, bool):
          return s
      s = str(s).strip()
      return s.lower() in truthy
docs: Return the boolean value ``True`` if the case-lowered value of string
      input ``s`` is a :term:`truthy string`. If ``s`` is already one of the
      boolean values ``True`` or ``False``, return it.