parameters: (self, filename, mode, fallback_mode)
docstring: Create an Opener.
  
      Args:
        filename: string, The pathname of the file.
        mode: string, The preferred mode to access the file with.
        fallback_mode: string, The mode to use if locking fails.
docstring_summary: Create an Opener.
docstring_tokens: Create an Opener .
function: def __init__(self, filename, mode, fallback_mode):
      """Create an Opener.
  
      Args:
        filename: string, The pathname of the file.
        mode: string, The preferred mode to access the file with.
        fallback_mode: string, The mode to use if locking fails.
      """
      self._locked = False
      self._filename = filename
      self._mode = mode
      self._fallback_mode = fallback_mode
      self._fh = None
function_tokens: def __init__ ( self , filename , mode , fallback_mode ) : self . _locked = False self . _filename = filename self . _mode = mode self . _fallback_mode = fallback_mode self . _fh = None