typedef ctree_items_t parents_t;

parents_t parents;      ///< Vector of parents of the current item

/// Get parent of the current item as an expression
cexpr_t *parent_expr(void) { return (cexpr_t *)parents.back(); }

// Get parent of the current item as a statement
cinsn_t *parent_insn(void) { return (cinsn_t *)parents.back(); }

for parent in reversed(self.parents):
  print "|==> %s [%d]" % (hex(parent.ea), parent.op)

parent.__class__ = cexpr_t
print parent.x