code: def __str__(self):
      return "Argument.any_default"
  
imports: from collections import namedtuple
  import inspect
  from itertools import chain
  from six.moves import map, zip_longest
  from catalyst.errors import ZiplineError
label_desc: Use image node_id 1 for calling the AnyDefault obj's underlying member method code with example usage: obj.__str__() and returns: str