code: def get_passenger_queue_stats(self):
          
          queue_stats = {
              "top_level_queue_size": 0.0,
              "passenger_queue_size": 0.0,
          }
  
          command = [self.config["passenger_status_bin"]]
          if str_to_bool(self.config["use_sudo"]):
              command.insert(0, self.config["sudo_cmd"])
  
          try:
              proc1 = subprocess.Popen(command, stdout=subprocess.PIPE)
              (std_out, std_err) = proc1.communicate()
  
          except OSError:
              return {}
  
          if std_out is None:
              return {}
  
          re_colour = re.compile("\x1B\[([0-9]{1,3}((;[0-9]{1,3})*)?)?[m|K]")
          re_requests = re.compile(r"Requests")
          re_topqueue = re.compile(r"^top-level")
  
          gen_info_flag = 0
          app_groups_flag = 0
          for raw_line in std_out.splitlines():
              line = re_colour.sub("", raw_line)
              if "General information" in line:
                  gen_info_flag = 1
              if "Application groups" in line:
                  app_groups_flag = 1
              elif re_requests.match(line) and re_topqueue.search(line):
                  # If line starts with Requests and line has top-level queue then
                  # store queue size
                  line_splitted = line.split()
                  if gen_info_flag == 1 and line_splitted:
                      queue_stats["top_level_queue_size"] = float(
                          line_splitted[5])
              elif re_requests.search(line) and not re_topqueue.search(line):
                  # If line has Requests and nothing else special
                  line_splitted = line.split()
                  if app_groups_flag == 1 and line_splitted:
                      queue_stats["passenger_queue_size"] = float(
                          line_splitted[3])
  
          return queue_stats
docs: Execute passenger-stats, parse its output, returnand requests in queue