class_docstr: The dummy format is an example format that does nothing.
  It will never indicate that it can read or write a file. When
  explicitly asked to read, it will simply read the bytes. When
  explicitly asked to write, it will raise an error.
  
  This documentation is shown when the user does ``help('thisformat')``.
  
  Parameters for reading
  ----------------------
  Specify arguments in numpy doc style here.
  
  Parameters for saving
  ---------------------
  Specify arguments in numpy doc style here.
code: def _can_read(self, request):
      # This method is called when the format manager is searching
      # for a format to read a certain image. Return True if this format
      # can do it.
      #
      # The format manager is aware of the extensions and the modes
      # that each format can handle. It will first ask all formats
      # that *seem* to be able to read it whether they can. If none
      # can, it will ask the remaining formats if they can: the
      # extension might be missing, and this allows formats to provide
      # functionality for certain extensions, while giving preference
      # to other plugins.
      #
      # If a format says it can, it should live up to it. The format
      # would ideally check the request.firstbytes and look for a
      # header of some kind.
      #
      # The request object has:
      # request.filename: a representation of the source (only for reporting)
      # request.firstbytes: the first 256 bytes of the file.
      # request.mode[0]: read or write mode
  
      if request.extension in self.extensions:
          return True
  
imports: import numpy
  from ..None import formats
  from ..core import Format
label_desc: Use image node_id 1 for calling the DummyFormat obj's underlying member method code with example usage: obj._can_read(request) and returns: True