class_docstr: The X Viewer ``xv`` command.
  This viewer supports the ``title`` parameter.
class_docstr_tok: ["The","X","Viewer","``","xv","``","command",".","This","viewer","supports","the","``","title","``","parameter","."]
code: def get_command_ex(self, file, title=None, **options):
      # note: xv is pretty outdated.  most modern systems have
      # imagemagick's display command instead.
      command = executable = "xv"
      if title:
          command += f" -name {quote(title)}"
      return command, executable
  
imports: import os
  import shutil
  import subprocess
  import sys
  from shlex import quote
  from .None import Image
label_desc: Use image node_id 1 for calling the XVViewer obj's underlying member method code with example usage: obj.get_command_ex(file, title) and returns: command,  executable