notebook_shim_mixin_bridging_classic_jupyter_traits_to_server_extension.py

1from traitlets import Unicode
2from jupyter_server.extension.application import ExtensionApp
3from notebook_shim.shim import NotebookConfigShimMixin
4
5class MyExtension(NotebookConfigShimMixin, ExtensionApp):
6    # The name of the extension
7    name = "my_extension"
8    
9    # A traitlet that might have been defined in a classic notebook config
10    custom_trait = Unicode("default", config=True).tag(config=True)
11
12    def initialize_settings(self):
13        # This method is called during extension initialization
14        self.log.info(f"Custom trait value: {self.custom_trait}")
15
16if __name__ == "__main__":
17    # Launch the extension, which will now automatically 
18    # pick up 'MyExtension.custom_trait' from classic 
19    # jupyter_notebook_config.py files.
20    MyExtension.launch_instance()