class_docstr: Rendering format parameter with ``'pdf'`` default.
docstr: The output format used for rendering
  (``'pdf'``, ``'png'``, ...).
code: def format(self) -> str:
      """The output format used for rendering
      (``'pdf'``, ``'png'``, ...)."""
      return self._format
  
file_path: graphviz/graphviz/parameters/formats.py
imports: import typing
  from .None import base
label_desc: Use image node_id 3 for calling the Format obj's underlying member method code with example usage: obj.format() and returns: self