class_docstr: The provided 'callable' is not actually a callable.
class_docstr_tok: ["The","provided","'callable","'","is","not","actually","a","callable","."]
code: def format_callable(self):
      try:
          return self.callable_.__name__
      except AttributeError:
          return str(self.callable_)
  
imports: from collections import namedtuple
  from itertools import chain
  from six.moves import map, zip_longest
  from zipline.errors import ZiplineError
  from zipline.utils.compat import getargspec
label_desc: Use image node_id 3 for calling the NotCallable obj's underlying member method code with example usage: obj.format_callable() and returns: self, str