code: def exclusive_time(self):
      return self.total_time() - sum(
          child.time() for child in self.children()
      )
  
imports: from __future__ import print_function
  import timeit
  from sympy import *
label_desc: Use image node_id 8 for calling the TreeNode obj's underlying member method code with example usage: obj.exclusive_time() and returns: unknown