@@ -7,28 +7,42 @@ import warnings

 _async_enabled = False

-_plotting_enabled = False

+_holoviews_enabled = False

+_ipywidgets_enabled = False

+_plotly_enabled = False

 def notebook_extension():

+    """Enable ipywidgets, holoviews, and asyncio notebook integration."""

     if not in_ipynb():

         raise RuntimeError('"adaptive.notebook_extension()" may only be run '

                            'from a Jupyter notebook.')

-    global _plotting_enabled

-    _plotting_enabled = False

+    global _async_enabled, _holoviews_enabled, _ipywidgets_enabled

+

+    # Load holoviews

+    try:

+        if not _holoviews_enabled:

+            import holoviews

+            holoviews.notebook_extension('bokeh', logo=False)

+            _holoviews_enabled = True

+    except ModuleNotFoundError:

+        warnings.warn("holoviews is not installed; plotting "

+                      "is disabled.", RuntimeWarning)

+    

+    # Load ipywidgets

     try:

-        import ipywidgets

-        import holoviews

-        holoviews.notebook_extension('bokeh', logo=False)

-        _plotting_enabled = True

+        if not _ipywidgets_enabled:

+            import ipywidgets

+            _ipywidgets_enabled = True

     except ModuleNotFoundError:

-        warnings.warn("holoviews and (or) ipywidgets are not installed; plotting "

+        warnings.warn("ipywidgets is not installed; live_info "

                       "is disabled.", RuntimeWarning)

-    global _async_enabled

-    get_ipython().magic('gui asyncio')

-    _async_enabled = True

+    # Enable asyncio integration

+    if not _async_enabled:

+        get_ipython().magic('gui asyncio')

+        _async_enabled = True

 def ensure_holoviews():

@@ -38,6 +52,22 @@ def ensure_holoviews():

         raise RuntimeError('holoviews is not installed; plotting is disabled.')

+def ensure_plotly():

+    global _plotly_enabled

+    try:

+        import plotly

+        if not _plotly_enabled:

+            import plotly.graph_objs

+            import plotly.figure_factory

+            import plotly.offline

+            # This injects javascript and should happen only once

+            plotly.offline.init_notebook_mode()

+            _plotly_enabled = True

+        return plotly

+    except ModuleNotFoundError:

+        raise RuntimeError('plotly is not installed; plotting is disabled.')

+

+

 def in_ipynb():

     try:

         # If we are running in IPython, then `get_ipython()` is always a global

@@ -72,7 +102,7 @@ def live_plot(runner, *, plotter=None, update_interval=2, name=None):

     dm : `holoviews.core.DynamicMap`

         The plot that automatically updates every `update_interval`.

     """

-    if not _plotting_enabled:

+    if not _holoviews_enabled:

         raise RuntimeError("Live plotting is not enabled; did you run "

                            "'adaptive.notebook_extension()'?")

@@ -126,7 +156,7 @@ def live_info(runner, *, update_interval=0.5):

     Returns an interactive ipywidget that can be

     visualized in a Jupyter notebook.

     """

-    if not _plotting_enabled:

+    if not _holoviews_enabled:

         raise RuntimeError("Live plotting is not enabled; did you run "

                            "'adaptive.notebook_extension()'?")

@@ -10,6 +10,7 @@ dependencies:

     - scipy

     - holoviews

     - bokeh

+    - plotly

     - ipyparallel

     - distributed

     - ipykernel>=4.8*

@@ -14,3 +14,4 @@ dependencies:

   - jupyter_client>=5.2.2

   - ipywidgets

   - scikit-optimize

+  - plotly

@@ -38,6 +38,7 @@ extras_require = {

         'ipywidgets',

         'bokeh',

         'matplotlib',

+        'plotly',

     ],

 }