code: def get_kernel_id(self):
          
          sessions_url = self.get_session_url()
          sessions_req = requests.get(sessions_url).content.decode()
          sessions = json.loads(sessions_req)
  
          if os.name == 'nt':
              path = self.path.replace('\\', '/')
          else:
              path = self.path
  
          for session in sessions:
              notebook_path = session.get('notebook', {}).get('path')
              if notebook_path is not None and notebook_path == path:
                  kernel_id = session['kernel']['id']
                  return kernel_id
docs: Get the kernel id of the client.
  
          Return a str with the kernel id or None.