code: def is_iterable(x):
      if isinstance(x, str):
          return False
      try:
          iter(x)
          return True
      except TypeError:
          return False
  
file_path: tensorforce/tensorforce/exception.py
label_desc: Use image node_id 1 for calling a global function with example usage: is_iterable(x) and returns: False, True, False