text: #!/usr/bin/env python3
  
  import requests
  import time
  
  
  def performance():
      url = "http://localhost:6070/users/"
  
      for i in range(100):
          r = requests.get(url)
          print(f"{i:02d} {r}")
          time.sleep(0.01)
  
  
  class A(object):
      code = 'a'
  
      def __init__(self, code=None):
          if code is not None:
              self.code = code
  
  
  def test():
      a = A(code=1)
      b = A()
      print(a.code)
      print(b.code)
  
  
  if __name__ == '__main__':
      # performance()
      test()
  