code: def _try_connect(self):
      startup_sec = 1
      self.server_connected = self.vis.check_connection()
      while not self.server_connected and startup_sec > 0:
          time.sleep(0.1)
          startup_sec -= 0.1
          self.server_connected = self.vis.check_connection()
      assert (
          self.server_connected
      ), "No connection could be formed quickly"
  
imports: import gc
  import numpy
  import math
  import json
  import time
  from .summary import compute_curve
  from .utils import figure_to_image
  from .x2num import make_np
label_desc: Use image node_id 2 for calling the VisdomWriter obj's underlying member method code with example usage: obj._try_connect() without return types