old_contents: # coding: utf-8
  """A tornado based Jupyter lab server."""
  
  # Copyright (c) Jupyter Development Team.
  # Distributed under the terms of the Modified BSD License.
  import os
  
  from jupyterlab_launcher import add_handlers, LabConfig
  
  from .commands import _get_config_dir, _get_runtime_dir
  from ._version import __version__
  
  #-----------------------------------------------------------------------------
  # Module globals
  #-----------------------------------------------------------------------------
  
  DEV_NOTE_NPM = """You're running JupyterLab from source.
  If you're working on the TypeScript sources of JupyterLab, try running
  
      npm run watch
  
  from the JupyterLab repo directory in another terminal window to have the
  system incrementally watch and build JupyterLab's TypeScript for you, as you
  make changes.
  """
  
  
  CORE_NOTE = """
  Running the core application with no additional extensions or settings
  """
  
  
  def load_jupyter_server_extension(nbapp):
      """Load the JupyterLab server extension.
      """
      # Print messages.
      here = os.path.dirname(__file__)
      nbapp.log.info('JupyterLab alpha preview extension loaded from %s' % here)
  
      web_app = nbapp.web_app
      config = LabConfig()
      config.assets_dir = _get_runtime_dir()
      config.settings_dir = _get_config_dir()
      config.page_title = 'JupyterLab Alpha Preview'
      config.name = 'JupyterLab'
      config.page_url = '/lab'
      config.version = __version__
  
      # Check for dev dir.
      dev_dir = ''
      if hasattr(nbapp, 'dev_dir'):
          dev_dir = nbapp.dev_dir
  
      if dev_dir:
          nbapp.log.info(DEV_NOTE_NPM)
          config.assets_dir = os.path.join(here, 'build')
          config.settings_dir = ''
          config.dev_mode = True
  
          add_handlers(web_app, config)
          return
  
      # Check for explicit core mode.
      core_mode = False
      if hasattr(nbapp, 'core_mode'):
          core_mode = nbapp.core_mode
  
      # Run core mode if explicit or there is no settings directory.
      if core_mode or not os.path.exists(config.settings_dir):
          config.assets_dir = os.path.join(here, 'static', 'build')
          if not os.path.exists(config.assets_dir):
              msg = 'Static assets not built, please see CONTRIBUTING.md'
              nbapp.log.error(msg)
          else:
              nbapp.log.info(CORE_NOTE.strip())
  
      from PyQt5.QtCore import pyqtRemoveInputHook; pyqtRemoveInputHook()
      import ipdb; ipdb.set_trace()
      pass
      
  
      add_handlers(web_app, config)
  
new_contents: # coding: utf-8
  """A tornado based Jupyter lab server."""
  
  # Copyright (c) Jupyter Development Team.
  # Distributed under the terms of the Modified BSD License.
  import os
  
  from jupyterlab_launcher import add_handlers, LabConfig
  
  from .commands import _get_config_dir, _get_runtime_dir
  from ._version import __version__
  
  #-----------------------------------------------------------------------------
  # Module globals
  #-----------------------------------------------------------------------------
  
  DEV_NOTE_NPM = """You're running JupyterLab from source.
  If you're working on the TypeScript sources of JupyterLab, try running
  
      npm run watch
  
  from the JupyterLab repo directory in another terminal window to have the
  system incrementally watch and build JupyterLab's TypeScript for you, as you
  make changes.
  """
  
  
  CORE_NOTE = """
  Running the core application with no additional extensions or settings
  """
  
  
  def load_jupyter_server_extension(nbapp):
      """Load the JupyterLab server extension.
      """
      # Print messages.
      here = os.path.dirname(__file__)
      nbapp.log.info('JupyterLab alpha preview extension loaded from %s' % here)
  
      web_app = nbapp.web_app
      config = LabConfig()
      config.assets_dir = _get_runtime_dir()
      config.settings_dir = _get_config_dir()
      config.page_title = 'JupyterLab Alpha Preview'
      config.name = 'JupyterLab'
      config.page_url = '/lab'
      config.version = __version__
  
      # Check for dev dir.
      dev_dir = ''
      if hasattr(nbapp, 'dev_dir'):
          dev_dir = nbapp.dev_dir
  
      if dev_dir:
          nbapp.log.info(DEV_NOTE_NPM)
          config.assets_dir = os.path.join(here, 'build')
          config.settings_dir = ''
          config.dev_mode = True
  
          add_handlers(web_app, config)
          return
  
      # Check for explicit core mode.
      core_mode = False
      if hasattr(nbapp, 'core_mode'):
          core_mode = nbapp.core_mode
  
      # Run core mode if explicit or there is no settings directory.
      if core_mode or not os.path.exists(config.settings_dir):
          config.assets_dir = os.path.join(here, 'static', 'build')
          if not os.path.exists(config.assets_dir):
              msg = 'Static assets not built, please see CONTRIBUTING.md'
              nbapp.log.error(msg)
          else:
              nbapp.log.info(CORE_NOTE.strip())
  
      add_handlers(web_app, config)
  
subject: remove debug code