code: def try_read(self, config_dir=None, **kwargs):
          
          if isinstance(config_dir, basestring):
              config_dir = (config_dir,)
  
          for cdir in config_dir:
              try:
                  self.read(cdir, **kwargs)
                  return cdir
  
              except IOError as e:
                  pass
docs: try reading without throwing an error
          config_dir may be a list of directories to try in order, if so it
          will return after the first successful read
          other args will be passed direction to read()