class_docstr: Also immutable.
class_docstr_tok: ["Also","immutable","."]
code: def __hash__(self):
      return hash((_Subterm, self.efactors))
  
imports: from __future__ import print_function
  from patsy.util import no_pickling
label_desc: Use image node_id 4 for calling the _Subterm obj's underlying member method code with example usage: obj.__hash__() and returns: hash