code: def glymurrc_fname():
      
  
      # Current directory.
      fname = os.path.join(os.getcwd(), 'glymurrc')
      if os.path.exists(fname):
          return fname
  
      confdir = get_configdir()
      if confdir is not None:
          fname = os.path.join(confdir, 'glymurrc')
          if os.path.exists(fname):
              return fname
  
      # didn't find a configuration file.
      return None
docs: Return the path to the configuration file.
  
      Search order:
          1) current working directory
          2) environ var XDG_CONFIG_HOME
          3) $HOME/.config/glymur/glymurrc