code: def isiterofiter(obj):
      return isiter(obj) and isiter(obj[0])
  
imports: from copy import copy
  from inspect import signature, _empty
  import re
  from collections.abc import Iterable
  from collections import defaultdict
  from itertools import product
  from six import string_types
label_desc: Use image node_id 2 for calling a global function with example usage: isiterofiter(obj) and returns: unknown