code: def subtests_by_status(self, status):
      return [x.status for x in self.subtests].count(status)
  
imports: import collections
  import functools
  import math
  import os
  import re
  import sys
  import yatest_lib.tools
label_desc: Use image node_id 7 for calling the Test obj's underlying member method code with example usage: obj.subtests_by_status(status) and returns: unknown