class_docstr: Base class for viewers.
class_docstr_tok: ["Base","class","for","viewers","."]
docstr: Return format name, or ``None`` to save as PGM/PPM.
docstr_tok: ["Return","format","name",",","or","``","None","``","to","save","as","PGM\/PPM","."]
code: def get_format(self, image):
      """Return format name, or ``None`` to save as PGM/PPM."""
      return self.format
  
imports: import os
  import shutil
  import subprocess
  import sys
  from shlex import quote
  from .None import Image
label_desc: Use image node_id 2 for calling the Viewer obj's underlying member method code with example usage: obj.get_format(image) and returns: self