code: def _compute_deletions(self):
          
          M, N, L, edgelist = self.M, self.N, self.L, self._edgelist
          if 2**len(self._evil) <= self._proc_limit:
              deletions = self._compute_all_deletions()
              self._processors = [self._subprocessor(d) for d in deletions]
          else:
              self._processors = None
docs: If there are fewer than self._proc_limit possible deletion
          sets, compute all subprocessors obtained by deleting a
          minimal subset of qubits.