diff --git a/IPython/html/notebookapp.py b/IPython/html/notebookapp.py
index 291094c..36e0f2e 100644
--- a/IPython/html/notebookapp.py
+++ b/IPython/html/notebookapp.py
@@ -9,6 +9,7 @@ from __future__ import print_function
import base64
import datetime
import errno
+import importlib
import io
import json
import logging
@@ -709,6 +710,11 @@ class NotebookApp(BaseIPythonApplication):
self.config.FileContentsManager.root_dir = new
self.config.MappingKernelManager.root_dir = new
+ server_extensions = List(Unicode(), config=True,
+ help=("Python modules to load as notebook server extensions. "
+ "This is an experimental API, and may change in future releases.")
+ )
+
def parse_command_line(self, argv=None):
super(NotebookApp, self).parse_command_line(argv)
@@ -915,6 +921,24 @@ class NotebookApp(BaseIPythonApplication):
elif status == 'unclean':
self.log.warn("components submodule unclean, you may see 404s on static/components")
self.log.warn("run `setup.py submodule` or `git submodule update` to update")
+
+ def init_server_extensions(self):
+ """Load any extensions specified by config.
+
+ Import the module, then call the load_jupyter_server_extension function,
+ if one exists.
+
+ The extension API is experimental, and may change in future releases.
+ """
+ for modulename in self.server_extensions:
+ try:
+ mod = importlib.import_module(modulename)
+ func = getattr(mod, 'load_jupyter_server_extension', None)
+ if func is not None:
+ func(self)
+ except Exception:
+ self.log.warn("Error loading server extension %s", modulename,
+ exc_info=True)
@catch_config_error
def initialize(self, argv=None):
@@ -926,6 +950,7 @@ class NotebookApp(BaseIPythonApplication):
self.init_webapp()
self.init_terminals()
self.init_signal()
+ self.init_server_extensions()
def cleanup_kernels(self):
"""Shutdown all kernels.