old_contents: from __future__ import print_function
  
  from jupyter_kernel import MagicKernel
  
  
  class BashKernel(MagicKernel):
      implementation = 'Bash'
      implementation_version = '1.0'
      language = 'bash'
      language_version = '0.1'
      banner = "Bash kernel - interact with a bash prompt"
  
      def get_usage(self):
          return "This is the bash kernel."
  
      def do_execute_direct(self, code):
          shell_magic = self.line_magics['shell']
          resp, error = shell_magic.eval(code.strip())
          if error:
              self.Error(error)
          if resp:
              self.Print(resp)
  
      def add_complete(self, matches, token):
          shell_magic = self.line_magics['shell']
          matches.extend(shell_magic.get_completions(token))
  
  if __name__ == '__main__':
      from IPython.kernel.zmq.kernelapp import IPKernelApp
      IPKernelApp.launch_instance(kernel_class=BashKernel)
  
new_contents: from __future__ import print_function
  
  from jupyter_kernel import MagicKernel
  
  
  class BashKernel(MagicKernel):
      implementation = 'Bash'
      implementation_version = '1.0'
      language = 'bash'
      language_version = '0.1'
      banner = "Bash kernel - interact with a bash prompt"
  
      def get_usage(self):
          return "This is the bash kernel."
  
      def do_execute_direct(self, code):
          shell_magic = self.line_magics['shell']
          resp, error = shell_magic.eval(code.strip())
          if error:
              self.Error(error)
          if resp:
              self.Print(resp)
  
      def get_completions(self, token):
          shell_magic = self.line_magics['shell']
          return shell_magic.get_completions(token)
  
      def get_kernel_help_on(self, expr, level=0):
          shell_magic = self.line_magics['shell']
          return shell_magic.get_help_on(expr, level)
  
  if __name__ == '__main__':
      from IPython.kernel.zmq.kernelapp import IPKernelApp
      IPKernelApp.launch_instance(kernel_class=BashKernel)
  
subject: Update bash kernel to use new shell api and shell help.