text: # Configuration file for jupyter-notebook.
  
  import os
  
  #------------------------------------------------------------------------------
  # Application(SingletonConfigurable) configuration
  #------------------------------------------------------------------------------
  
  ## This is an application.
  
  ## The date format used by logging formatters for %(asctime)s
  #c.Application.log_datefmt = '%Y-%m-%d %H:%M:%S'
  
  ## The Logging format template
  #c.Application.log_format = '[%(name)s]%(highlevel)s %(message)s'
  
  ## Set the log level by value or name.
  #c.Application.log_level = 30
  
  #------------------------------------------------------------------------------
  # JupyterApp(Application) configuration
  #------------------------------------------------------------------------------
  
  ## Base class for Jupyter applications
  
  ## Answer yes to any prompts.
  #c.JupyterApp.answer_yes = False
  
  ## Full path of a config file.
  #c.JupyterApp.config_file = ''
  
  ## Specify a config file to load.
  #c.JupyterApp.config_file_name = ''
  
  ## Generate default config file.
  #c.JupyterApp.generate_config = False
  
  #------------------------------------------------------------------------------
  # NotebookApp(JupyterApp) configuration
  #------------------------------------------------------------------------------
  
  ## Set the Access-Control-Allow-Credentials: true header
  #c.NotebookApp.allow_credentials = False
  
  ## Set the Access-Control-Allow-Origin header
  #
  #  Use '*' to allow any origin to access your server.
  #
  #  Takes precedence over allow_origin_pat.
  #c.NotebookApp.allow_origin = ''
  
  ## Use a regular expression for the Access-Control-Allow-Origin header
  #
  #  Requests from an origin matching the expression will get replies with:
  #
  #      Access-Control-Allow-Origin: origin
  #
  #  where `origin` is the origin of the request.
  #
  #  Ignored if allow_origin is set.
  #c.NotebookApp.allow_origin_pat = ''
  
  ## Allow password to be changed at login for the notebook server.
  #
  #  While loggin in with a token, the notebook server UI will give the opportunity
  #  to the user to enter a new password at the same time that will replace the
  #  token login mechanism.
  #
  #  This can be set to false to prevent changing password from the UI/API.
  #c.NotebookApp.allow_password_change = True
  
  ## Whether to allow the user to run the notebook as root.
  #c.NotebookApp.allow_root = False
  
  ## DEPRECATED use base_url
  #c.NotebookApp.base_project_url = '/'
  
  ## The base URL for the notebook server.
  #
  #  Leading and trailing slashes can be omitted, and will automatically be added.
  #c.NotebookApp.base_url = '/'
  
  ## Specify what command to use to invoke a web browser when opening the notebook.
  #  If not specified, the default browser will be determined by the `webbrowser`
  #  standard library module, which allows setting of the BROWSER environment
  #  variable to override it.
  #c.NotebookApp.browser = ''
  
  ## The full path to an SSL/TLS certificate file.
  #c.NotebookApp.certfile = ''
  
  ## The full path to a certificate authority certificate for SSL/TLS client
  #  authentication.
  #c.NotebookApp.client_ca = ''
  
  ## The config manager class to use
  #c.NotebookApp.config_manager_class = 'notebook.services.config.manager.ConfigManager'
  
  ## The notebook manager class to use.
  #c.NotebookApp.contents_manager_class = 'notebook.services.contents.largefilemanager.LargeFileManager'
  
  ## Extra keyword arguments to pass to `set_secure_cookie`. See tornado's
  #  set_secure_cookie docs for details.
  #c.NotebookApp.cookie_options = {}
  
  ## The random bytes used to secure cookies. By default this is a new random
  #  number every time you start the Notebook. Set it to a value in a config file
  #  to enable logins to persist across server sessions.
  #
  #  Note: Cookie secrets should be kept private, do not share config files with
  #  cookie_secret stored in plaintext (you can read the value from a file).
  #c.NotebookApp.cookie_secret = b''
  
  ## The file where the cookie secret is stored.
  #c.NotebookApp.cookie_secret_file = ''
  
  ## The default URL to redirect to from `/`
  #c.NotebookApp.default_url = '/tree'
  
  ## Disable cross-site-request-forgery protection
  #
  #  Jupyter notebook 4.3.1 introduces protection from cross-site request
  #  forgeries, requiring API requests to either:
  #
  #  - originate from pages served by this server (validated with XSRF cookie and
  #  token), or - authenticate with a token
  #
  #  Some anonymous compute resources still desire the ability to run code,
  #  completely without authentication. These services can disable all
  #  authentication and security checks, with the full knowledge of what that
  #  implies.
  #c.NotebookApp.disable_check_xsrf = False
  
  ## Whether to enable MathJax for typesetting math/TeX
  #
  #  MathJax is the javascript library Jupyter uses to render math/LaTeX. It is
  #  very large, so you may want to disable it if you have a slow internet
  #  connection, or for offline use of the notebook.
  #
  #  When disabled, equations etc. will appear as their untransformed TeX source.
  #c.NotebookApp.enable_mathjax = True
  
  ## extra paths to look for Javascript notebook extensions
  #c.NotebookApp.extra_nbextensions_path = []
  
  ## handlers that should be loaded at higher priority than the default services
  #c.NotebookApp.extra_services = []
  
  ## Extra paths to search for serving static files.
  #
  #  This allows adding javascript/css to be available from the notebook server
  #  machine, or overriding individual files in the IPython
  #c.NotebookApp.extra_static_paths = []
  
  ## Extra paths to search for serving jinja templates.
  #
  #  Can be used to override templates from notebook.templates.
  #c.NotebookApp.extra_template_paths = []
  
  ##
  #c.NotebookApp.file_to_run = ''
  
  ## Deprecated: Use minified JS file or not, mainly use during dev to avoid JS
  #  recompilation
  #c.NotebookApp.ignore_minified_js = False
  
  ## (bytes/sec) Maximum rate at which stream output can be sent on iopub before
  #  they are limited.
  #c.NotebookApp.iopub_data_rate_limit = 1000000
  
  ## (msgs/sec) Maximum rate at which messages can be sent on iopub before they are
  #  limited.
  #c.NotebookApp.iopub_msg_rate_limit = 1000
  
  ## The IP address the notebook server will listen on.
  #c.NotebookApp.ip = 'localhost'
  
  ## Supply extra arguments that will be passed to Jinja environment.
  #c.NotebookApp.jinja_environment_options = {}
  
  ## Extra variables to supply to jinja templates when rendering.
  #c.NotebookApp.jinja_template_vars = {}
  
  ## The kernel manager class to use.
  #c.NotebookApp.kernel_manager_class = 'notebook.services.kernels.kernelmanager.MappingKernelManager'
  
  ## The kernel spec manager class to use. Should be a subclass of
  #  `jupyter_client.kernelspec.KernelSpecManager`.
  #
  #  The Api of KernelSpecManager is provisional and might change without warning
  #  between this version of Jupyter and the next stable one.
  #c.NotebookApp.kernel_spec_manager_class = 'jupyter_client.kernelspec.KernelSpecManager'
  
  ## The full path to a private key file for usage with SSL/TLS.
  #c.NotebookApp.keyfile = ''
  
  ## The login handler class to use.
  #c.NotebookApp.login_handler_class = 'notebook.auth.login.LoginHandler'
  
  ## The logout handler class to use.
  #c.NotebookApp.logout_handler_class = 'notebook.auth.logout.LogoutHandler'
  
  ## The MathJax.js configuration file that is to be used.
  #c.NotebookApp.mathjax_config = 'TeX-AMS-MML_HTMLorMML-full,Safe'
  
  ## A custom url for MathJax.js. Should be in the form of a case-sensitive url to
  #  MathJax, for example:  /static/components/MathJax/MathJax.js
  #c.NotebookApp.mathjax_url = ''
  
  ## Dict of Python modules to load as notebook server extensions.Entry values can
  #  be used to enable and disable the loading ofthe extensions. The extensions
  #  will be loaded in alphabetical order.
  #c.NotebookApp.nbserver_extensions = {}
  
  ## The directory to use for notebooks and kernels.
  c.NotebookApp.notebook_dir = os.path.expanduser("~/GDrive/Notebooks")
  
  ## Whether to open in a browser after starting. The specific browser used is
  #  platform dependent and determined by the python standard library `webbrowser`
  #  module, unless it is overridden using the --browser (NotebookApp.browser)
  #  configuration option.
  c.NotebookApp.open_browser = False
  
  ## Hashed password to use for web authentication.
  #
  #  To generate, type in a python/IPython shell:
  #
  #    from notebook.auth import passwd; passwd()
  #
  #  The string should be of the form type:salt:hashed-password.
  #c.NotebookApp.password = ''
  
  ## Forces users to use a password for the Notebook server. This is useful in a
  #  multi user environment, for instance when everybody in the LAN can access each
  #  other's machine through ssh.
  #
  #  In such a case, server the notebook server on localhost is not secure since
  #  any user can connect to the notebook server via ssh.
  #c.NotebookApp.password_required = False
  
  ## The port the notebook server will listen on.
  c.NotebookApp.port = 4567
  
  ## The number of additional ports to try if the specified port is not available.
  #c.NotebookApp.port_retries = 50
  
  ## DISABLED: use %pylab or %matplotlib in the notebook to enable matplotlib.
  #c.NotebookApp.pylab = 'disabled'
  
  ## (sec) Time window used to  check the message and data rate limits.
  #c.NotebookApp.rate_limit_window = 3
  
  ## Reraise exceptions encountered loading server extensions?
  #c.NotebookApp.reraise_server_extension_failures = False
  
  ## DEPRECATED use the nbserver_extensions dict instead
  #c.NotebookApp.server_extensions = []
  
  ## The session manager class to use.
  #c.NotebookApp.session_manager_class = 'notebook.services.sessions.sessionmanager.SessionManager'
  
  ## Shut down the server after N seconds with no kernels or terminals running and
  #  no activity. This can be used together with culling idle kernels
  #  (MappingKernelManager.cull_idle_timeout) to shutdown the notebook server when
  #  it's not in use. This is not precisely timed: it may shut down up to a minute
  #  later. 0 (the default) disables this automatic shutdown.
  #c.NotebookApp.shutdown_no_activity_timeout = 0
  
  ## Supply SSL options for the tornado HTTPServer. See the tornado docs for
  #  details.
  #c.NotebookApp.ssl_options = {}
  
  ## Supply overrides for terminado. Currently only supports "shell_command".
  #c.NotebookApp.terminado_settings = {}
  
  ## Token used for authenticating first-time connections to the server.
  #
  #  When no password is enabled, the default is to generate a new, random token.
  #
  #  Setting to an empty string disables authentication altogether, which is NOT
  #  RECOMMENDED.
  #c.NotebookApp.token = '<generated>'
  
  ## Supply overrides for the tornado.web.Application that the Jupyter notebook
  #  uses.
  #c.NotebookApp.tornado_settings = {}
  
  ## Whether to trust or not X-Scheme/X-Forwarded-Proto and X-Real-Ip/X-Forwarded-
  #  For headerssent by the upstream reverse proxy. Necessary if the proxy handles
  #  SSL
  #c.NotebookApp.trust_xheaders = False
  
  ## DEPRECATED, use tornado_settings
  #c.NotebookApp.webapp_settings = {}
  
  ## Specify Where to open the notebook on startup. This is the
  #  `new` argument passed to the standard library method `webbrowser.open`.
  #  The behaviour is not guaranteed, but depends on browser support. Valid
  #  values are:
  #      2 opens a new tab,
  #      1 opens a new window,
  #      0 opens in an existing window.
  #  See the `webbrowser.open` documentation for details.
  #c.NotebookApp.webbrowser_open_new = 2
  
  ## Set the tornado compression options for websocket connections.
  #
  #  This value will be returned from
  #  :meth:`WebSocketHandler.get_compression_options`. None (default) will disable
  #  compression. A dict (even an empty one) will enable compression.
  #
  #  See the tornado docs for WebSocketHandler.get_compression_options for details.
  #c.NotebookApp.websocket_compression_options = None
  
  ## The base URL for websockets, if it differs from the HTTP server (hint: it
  #  almost certainly doesn't).
  #
  #  Should be in the form of an HTTP origin: ws[s]://hostname[:port]
  #c.NotebookApp.websocket_url = ''
  
  #------------------------------------------------------------------------------
  # ConnectionFileMixin(LoggingConfigurable) configuration
  #------------------------------------------------------------------------------
  
  ## Mixin for configurable classes that work with connection files
  
  ## JSON file in which to store connection info [default: kernel-<pid>.json]
  #
  #  This file will contain the IP, ports, and authentication key needed to connect
  #  clients to this kernel. By default, this file will be created in the security
  #  dir of the current profile, but can be specified by absolute path.
  #c.ConnectionFileMixin.connection_file = ''
  
  ## set the control (ROUTER) port [default: random]
  #c.ConnectionFileMixin.control_port = 0
  
  ## set the heartbeat port [default: random]
  #c.ConnectionFileMixin.hb_port = 0
  
  ## set the iopub (PUB) port [default: random]
  #c.ConnectionFileMixin.iopub_port = 0
  
  ## Set the kernel's IP address [default localhost]. If the IP address is
  #  something other than localhost, then Consoles on other machines will be able
  #  to connect to the Kernel, so be careful!
  #c.ConnectionFileMixin.ip = ''
  
  ## set the shell (ROUTER) port [default: random]
  #c.ConnectionFileMixin.shell_port = 0
  
  ## set the stdin (ROUTER) port [default: random]
  #c.ConnectionFileMixin.stdin_port = 0
  
  ##
  #c.ConnectionFileMixin.transport = 'tcp'
  
  #------------------------------------------------------------------------------
  # KernelManager(ConnectionFileMixin) configuration
  #------------------------------------------------------------------------------
  
  ## Manages a single kernel in a subprocess on this host.
  #
  #  This version starts kernels with Popen.
  
  ## Should we autorestart the kernel if it dies.
  #c.KernelManager.autorestart = True
  
  ## DEPRECATED: Use kernel_name instead.
  #
  #  The Popen Command to launch the kernel. Override this if you have a custom
  #  kernel. If kernel_cmd is specified in a configuration file, Jupyter does not
  #  pass any arguments to the kernel, because it cannot make any assumptions about
  #  the arguments that the kernel understands. In particular, this means that the
  #  kernel does not receive the option --debug if it given on the Jupyter command
  #  line.
  #c.KernelManager.kernel_cmd = []
  
  ## Time to wait for a kernel to terminate before killing it, in seconds.
  #c.KernelManager.shutdown_wait_time = 5.0
  
  #------------------------------------------------------------------------------
  # Session(Configurable) configuration
  #------------------------------------------------------------------------------
  
  ## Object for handling serialization and sending of messages.
  #
  #  The Session object handles building messages and sending them with ZMQ sockets
  #  or ZMQStream objects.  Objects can communicate with each other over the
  #  network via Session objects, and only need to work with the dict-based IPython
  #  message spec. The Session will handle serialization/deserialization, security,
  #  and metadata.
  #
  #  Sessions support configurable serialization via packer/unpacker traits, and
  #  signing with HMAC digests via the key/keyfile traits.
  #
  #  Parameters ----------
  #
  #  debug : bool
  #      whether to trigger extra debugging statements
  #  packer/unpacker : str : 'json', 'pickle' or import_string
  #      importstrings for methods to serialize message parts.  If just
  #      'json' or 'pickle', predefined JSON and pickle packers will be used.
  #      Otherwise, the entire importstring must be used.
  #
  #      The functions must accept at least valid JSON input, and output *bytes*.
  #
  #      For example, to use msgpack:
  #      packer = 'msgpack.packb', unpacker='msgpack.unpackb'
  #  pack/unpack : callables
  #      You can also set the pack/unpack callables for serialization directly.
  #  session : bytes
  #      the ID of this Session object.  The default is to generate a new UUID.
  #  username : unicode
  #      username added to message headers.  The default is to ask the OS.
  #  key : bytes
  #      The key used to initialize an HMAC signature.  If unset, messages
  #      will not be signed or checked.
  #  keyfile : filepath
  #      The file containing a key.  If this is set, `key` will be initialized
  #      to the contents of the file.
  
  ## Threshold (in bytes) beyond which an object's buffer should be extracted to
  #  avoid pickling.
  #c.Session.buffer_threshold = 1024
  
  ## Whether to check PID to protect against calls after fork.
  #
  #  This check can be disabled if fork-safety is handled elsewhere.
  #c.Session.check_pid = True
  
  ## Threshold (in bytes) beyond which a buffer should be sent without copying.
  #c.Session.copy_threshold = 65536
  
  ## Debug output in the Session
  #c.Session.debug = False
  
  ## The maximum number of digests to remember.
  #
  #  The digest history will be culled when it exceeds this value.
  #c.Session.digest_history_size = 65536
  
  ## The maximum number of items for a container to be introspected for custom
  #  serialization. Containers larger than this are pickled outright.
  #c.Session.item_threshold = 64
  
  ## execution key, for signing messages.
  #c.Session.key = b''
  
  ## path to file containing execution key.
  #c.Session.keyfile = ''
  
  ## Metadata dictionary, which serves as the default top-level metadata dict for
  #  each message.
  #c.Session.metadata = {}
  
  ## The name of the packer for serializing messages. Should be one of 'json',
  #  'pickle', or an import name for a custom callable serializer.
  #c.Session.packer = 'json'
  
  ## The UUID identifying this session.
  #c.Session.session = ''
  
  ## The digest scheme used to construct the message signatures. Must have the form
  #  'hmac-HASH'.
  #c.Session.signature_scheme = 'hmac-sha256'
  
  ## The name of the unpacker for unserializing messages. Only used with custom
  #  functions for `packer`.
  #c.Session.unpacker = 'json'
  
  ## Username for the Session. Default is your system username.
  #c.Session.username = 'rahulsalvi'
  
  #------------------------------------------------------------------------------
  # MultiKernelManager(LoggingConfigurable) configuration
  #------------------------------------------------------------------------------
  
  ## A class for managing multiple kernels.
  
  ## The name of the default kernel to start
  #c.MultiKernelManager.default_kernel_name = 'python3'
  
  ## The kernel manager class.  This is configurable to allow subclassing of the
  #  KernelManager for customized behavior.
  #c.MultiKernelManager.kernel_manager_class = 'jupyter_client.ioloop.IOLoopKernelManager'
  
  #------------------------------------------------------------------------------
  # MappingKernelManager(MultiKernelManager) configuration
  #------------------------------------------------------------------------------
  
  ## A KernelManager that handles notebook mapping and HTTP error handling
  
  ## Whether messages from kernels whose frontends have disconnected should be
  #  buffered in-memory.
  #
  #  When True (default), messages are buffered and replayed on reconnect, avoiding
  #  lost messages due to interrupted connectivity.
  #
  #  Disable if long-running kernels will produce too much output while no
  #  frontends are connected.
  #c.MappingKernelManager.buffer_offline_messages = True
  
  ## Whether to consider culling kernels which are busy. Only effective if
  #  cull_idle_timeout > 0.
  #c.MappingKernelManager.cull_busy = False
  
  ## Whether to consider culling kernels which have one or more connections. Only
  #  effective if cull_idle_timeout > 0.
  #c.MappingKernelManager.cull_connected = False
  
  ## Timeout (in seconds) after which a kernel is considered idle and ready to be
  #  culled. Values of 0 or lower disable culling. Very short timeouts may result
  #  in kernels being culled for users with poor network connections.
  #c.MappingKernelManager.cull_idle_timeout = 0
  
  ## The interval (in seconds) on which to check for idle kernels exceeding the
  #  cull timeout value.
  #c.MappingKernelManager.cull_interval = 300
  
  ##
  #c.MappingKernelManager.root_dir = ''
  
  #------------------------------------------------------------------------------
  # ContentsManager(LoggingConfigurable) configuration
  #------------------------------------------------------------------------------
  
  ## Base class for serving files and directories.
  #
  #  This serves any text or binary file, as well as directories, with special
  #  handling for JSON notebook documents.
  #
  #  Most APIs take a path argument, which is always an API-style unicode path, and
  #  always refers to a directory.
  #
  #  - unicode, not url-escaped
  #  - '/'-separated
  #  - leading and trailing '/' will be stripped
  #  - if unspecified, path defaults to '',
  #    indicating the root path.
  
  ## Allow access to hidden files
  #c.ContentsManager.allow_hidden = False
  
  ##
  #c.ContentsManager.checkpoints = None
  
  ##
  #c.ContentsManager.checkpoints_class = 'notebook.services.contents.checkpoints.Checkpoints'
  
  ##
  #c.ContentsManager.checkpoints_kwargs = {}
  
  ## handler class to use when serving raw file requests.
  #
  #  Default is a fallback that talks to the ContentsManager API, which may be
  #  inefficient, especially for large files.
  #
  #  Local files-based ContentsManagers can use a StaticFileHandler subclass, which
  #  will be much more efficient.
  #
  #  Access to these files should be Authenticated.
  #c.ContentsManager.files_handler_class = 'notebook.files.handlers.FilesHandler'
  
  ## Extra parameters to pass to files_handler_class.
  #
  #  For example, StaticFileHandlers generally expect a `path` argument specifying
  #  the root directory from which to serve files.
  #c.ContentsManager.files_handler_params = {}
  
  ## Glob patterns to hide in file and directory listings.
  #c.ContentsManager.hide_globs = ['__pycache__', '*.pyc', '*.pyo', '.DS_Store', '*.so', '*.dylib', '*~']
  
  ## Python callable or importstring thereof
  #
  #  To be called on a contents model prior to save.
  #
  #  This can be used to process the structure, such as removing notebook outputs
  #  or other side effects that should not be saved.
  #
  #  It will be called as (all arguments passed by keyword)::
  #
  #      hook(path=path, model=model, contents_manager=self)
  #
  #  - model: the model to be saved. Includes file contents.
  #    Modifying this dict will affect the file that is stored.
  #  - path: the API path of the save destination
  #  - contents_manager: this ContentsManager instance
  #c.ContentsManager.pre_save_hook = None
  
  ##
  #c.ContentsManager.root_dir = '/'
  
  ## The base name used when creating untitled directories.
  #c.ContentsManager.untitled_directory = 'Untitled Folder'
  
  ## The base name used when creating untitled files.
  #c.ContentsManager.untitled_file = 'untitled'
  
  ## The base name used when creating untitled notebooks.
  #c.ContentsManager.untitled_notebook = 'Untitled'
  
  #------------------------------------------------------------------------------
  # FileManagerMixin(Configurable) configuration
  #------------------------------------------------------------------------------
  
  ## Mixin for ContentsAPI classes that interact with the filesystem.
  #
  #  Provides facilities for reading, writing, and copying both notebooks and
  #  generic files.
  #
  #  Shared by FileContentsManager and FileCheckpoints.
  #
  #  Note ---- Classes using this mixin must provide the following attributes:
  #
  #  root_dir : unicode
  #      A directory against against which API-style paths are to be resolved.
  #
  #  log : logging.Logger
  
  ## By default notebooks are saved on disk on a temporary file and then if
  #  succefully written, it replaces the old ones. This procedure, namely
  #  'atomic_writing', causes some bugs on file system whitout operation order
  #  enforcement (like some networked fs). If set to False, the new notebook is
  #  written directly on the old one which could fail (eg: full filesystem or quota
  #  )
  #c.FileManagerMixin.use_atomic_writing = True
  
  #------------------------------------------------------------------------------
  # FileContentsManager(FileManagerMixin,ContentsManager) configuration
  #------------------------------------------------------------------------------
  
  ## If True (default), deleting files will send them to the platform's
  #  trash/recycle bin, where they can be recovered. If False, deleting files
  #  really deletes them.
  #c.FileContentsManager.delete_to_trash = True
  
  ## Python callable or importstring thereof
  #
  #  to be called on the path of a file just saved.
  #
  #  This can be used to process the file on disk, such as converting the notebook
  #  to a script or HTML via nbconvert.
  #
  #  It will be called as (all arguments passed by keyword)::
  #
  #      hook(os_path=os_path, model=model, contents_manager=instance)
  #
  #  - path: the filesystem path to the file just written - model: the model
  #  representing the file - contents_manager: this ContentsManager instance
  #c.FileContentsManager.post_save_hook = None
  
  ##
  #c.FileContentsManager.root_dir = ''
  
  ## DEPRECATED, use post_save_hook. Will be removed in Notebook 5.0
  #c.FileContentsManager.save_script = False
  
  #------------------------------------------------------------------------------
  # NotebookNotary(LoggingConfigurable) configuration
  #------------------------------------------------------------------------------
  
  ## A class for computing and verifying notebook signatures.
  
  ## The hashing algorithm used to sign notebooks.
  #c.NotebookNotary.algorithm = 'sha256'
  
  ## The sqlite file in which to store notebook signatures. By default, this will
  #  be in your Jupyter data directory. You can set it to ':memory:' to disable
  #  sqlite writing to the filesystem.
  #c.NotebookNotary.db_file = ''
  
  ## The secret key with which notebooks are signed.
  #c.NotebookNotary.secret = b''
  
  ## The file where the secret key is stored.
  #c.NotebookNotary.secret_file = ''
  
  ## A callable returning the storage backend for notebook signatures. The default
  #  uses an SQLite database.
  #c.NotebookNotary.store_factory = traitlets.Undefined
  
  #------------------------------------------------------------------------------
  # KernelSpecManager(LoggingConfigurable) configuration
  #------------------------------------------------------------------------------
  
  ## If there is no Python kernelspec registered and the IPython kernel is
  #  available, ensure it is added to the spec list.
  #c.KernelSpecManager.ensure_native_kernel = True
  
  ## The kernel spec class.  This is configurable to allow subclassing of the
  #  KernelSpecManager for customized behavior.
  #c.KernelSpecManager.kernel_spec_class = 'jupyter_client.kernelspec.KernelSpec'
  
  ## Whitelist of allowed kernel names.
  #
  #  By default, all installed kernels are allowed.
  #c.KernelSpecManager.whitelist = set()
  