DEPRECATED: Set the static default value for the trait type.

Part of the initialization which may depend on the underlying HasDescriptors instance. It is typically overloaded for specific types.

Cast a single item from a string Evaluated when parsing CLI configuration from a string

Parse command line arguments and return as a Config object. Parameters ---------- argv : optional, list If given,

Load multiple Python config files, merging each of them in turn. Parameters ---------- config_files : list of str List of config

Injected into config file namespace as load_subconfig

Currently loaded configuration files

Record traits set by both config and kwargs. They will need to be overridden again after loading config.

A decorator which can be used to observe Traits on a class. The handler passed to the decorator will be called with one ``change`` dict argum

Backward-compatibility shim decorator for observers Use with: @observe('name') @observe_compat def _foo_changed(self, change):

Print the application description.

Print usage and examples (see `emit_examples()`).

Print the options part of the help.

Print the subcommand part of the help.

Install the plugin. :param app: Sphinx application context.

Registers the Sphinx extension. You shouldn't need to call this directly; configure Sphinx to use this module instead.

Setup descriptor instance on the class This sets the :attr:`this_class` and :attr:`name` attributes of each BaseDescriptor in the cla

This is called **before** self.__init__ is called.

Return a decorated class with a constructor signature that contain Trait names as kwargs.

start function used when show_config is True

Check ability to override handling for unrecognized aliases

Verify all trait types are added to `traitlets.__all__`