class_docstr: A type checker was asked to check a type it did not have registered.
class_docstr_tok: ["A","type","checker","was","asked","to","check","a","type","it","did","not","have","registered","."]
code: def __unicode__(self):
      return "Type %r is unknown to this type checker" % self.type
  
imports: from collections import defaultdict, deque
  import itertools
  import pprint
  import textwrap
  import attr
  from jsonschema import _utils
  from jsonschema.compat import PY3, iteritems
label_desc: Use image node_id 2 for calling the UndefinedTypeCheck obj's underlying member method code with example usage: obj.__unicode__() and returns: unknown