code: def fmt(obj):
      if isinstance(obj, Term):
          r = obj.graph_repr()
      else:
          r = obj
      return '"%s"' % r
  
imports: from __future__ import unicode_literals
  from contextlib import contextmanager
  import errno
  from functools import partial
  from io import BytesIO
  from subprocess import Popen, PIPE
  from networkx import topological_sort
  from six import iteritems
  from zipline.pipeline.data import BoundColumn
  from zipline.pipeline import Filter, Factor, Classifier, Term
  from zipline.pipeline.term import AssetExists
label_desc: Use image node_id 12 for calling a global function with example usage: fmt(obj) and returns: unknown