class_docstr: An app to install a kernel spec.
docstr: Parse the command line args.
docstr_tok: ["Parse","the","command","line","args","."]
code: def parse_command_line(
      self, argv: None | list[str]
  ) -> None:  # type:ignore[override]
      """Parse the command line args."""
      super().parse_command_line(argv)
      # accept positional arg as profile name
      if self.extra_args:
          self.sourcedir = self.extra_args[0]
      else:
          print("No source directory specified.", file=sys.stderr)
          self.exit(1)
  
imports: from __future__ import annotations
  import errno
  import json
  import os.path
  import sys
  import typing
  from jupyter_core.application import JupyterApp, base_aliases, base_flags
  from traitlets import Bool, Dict, Instance, List, Unicode
  from traitlets.config.application import Application
  from .None import __version__
  from .kernelspec import KernelSpecManager
  from .provisioning.factory import KernelProvisionerFactory
label_desc: Use image node_id 3 for calling the InstallKernelSpec obj's underlying member method code with example usage: obj.parse_command_line(argv) without return types