class_docstr: Interface for categories in combinatory grammars.
class_docstr_tok: ["Interface","for","categories","in","combinatory","grammars","."]
code: def __hash__(self):
      try:
          return self._hash
      except AttributeError:
          self._hash = hash(self._comparison_key)
          return self._hash
  
imports: from abc import ABCMeta, abstractmethod
  from functools import total_ordering
  from nltk.internals import raise_unorderable_types
label_desc: Use image node_id 10 for calling the AbstractCCGCategory obj's underlying member method code with example usage: obj.__hash__() and returns: self, self