plotting datetime x axis -> NameError: name 'pandas_datetime_types' is not defined

[N4321D]

plotting lines with datetime x axis produces a NameError since
version '1.14.4' :

It is also visible in the docs at the Datetime axes section:
http://dev.holoviews.org/user_guide/Customizing_Plots.html

full traceback

---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
~/anaconda3/lib/python3.8/site-packages/IPython/core/formatters.py in __call__(self, obj, include, exclude)
    968 
    969             if method is not None:
--> 970                 return method(include=include, exclude=exclude)
    971             return None
    972         else:

~/anaconda3/lib/python3.8/site-packages/panel/viewable.py in _repr_mimebundle_(self, include, exclude)
    614         doc = _Document()
    615         comm = state._comm_manager.get_server_comm()
--> 616         model = self._render_model(doc, comm)
    617         ref = model.ref['id']
    618         manager = CommManager(comm_id=comm.id, plot_id=ref)

~/anaconda3/lib/python3.8/site-packages/panel/viewable.py in _render_model(self, doc, comm)
    453         if comm is None:
    454             comm = state._comm_manager.get_server_comm()
--> 455         model = self.get_root(doc, comm)
    456 
    457         if config.embed:

~/anaconda3/lib/python3.8/site-packages/panel/viewable.py in get_root(self, doc, comm, preprocess)
    510         """
    511         doc = init_doc(doc)
--> 512         root = self._get_model(doc, comm=comm)
    513         if preprocess:
    514             self._preprocess(root)

~/anaconda3/lib/python3.8/site-packages/panel/layout/base.py in _get_model(self, doc, root, parent, comm)
    120         if root is None:
    121             root = model
--> 122         objects = self._get_objects(model, [], doc, root, comm)
    123         props = dict(self._init_params(), objects=objects)
    124         model.update(**self._process_param_change(props))

~/anaconda3/lib/python3.8/site-packages/panel/layout/base.py in _get_objects(self, model, old_objects, doc, root, comm)
    110             else:
    111                 try:
--> 112                     child = pane._get_model(doc, root, model, comm)
    113                 except RerenderError:
    114                     return self._get_objects(model, current_objects[:i], doc, root, comm)

~/anaconda3/lib/python3.8/site-packages/panel/param.py in _get_model(self, doc, root, parent, comm)
    802         if not self._evaled:
    803             self._replace_pane(force=True)
--> 804         return super()._get_model(doc, root, parent, comm)
    805 
    806     #----------------------------------------------------------------

~/anaconda3/lib/python3.8/site-packages/panel/pane/base.py in _get_model(self, doc, root, parent, comm)
    416             if ref in self._models:
    417                 self._cleanup(root)
--> 418         model = self._inner_layout._get_model(doc, root, parent, comm)
    419         if root is None:
    420             ref = model.ref['id']

~/anaconda3/lib/python3.8/site-packages/panel/layout/base.py in _get_model(self, doc, root, parent, comm)
    120         if root is None:
    121             root = model
--> 122         objects = self._get_objects(model, [], doc, root, comm)
    123         props = dict(self._init_params(), objects=objects)
    124         model.update(**self._process_param_change(props))

~/anaconda3/lib/python3.8/site-packages/panel/layout/base.py in _get_objects(self, model, old_objects, doc, root, comm)
    110             else:
    111                 try:
--> 112                     child = pane._get_model(doc, root, model, comm)
    113                 except RerenderError:
    114                     return self._get_objects(model, current_objects[:i], doc, root, comm)

~/anaconda3/lib/python3.8/site-packages/panel/pane/holoviews.py in _get_model(self, doc, root, parent, comm)
    237             plot = self.object
    238         else:
--> 239             plot = self._render(doc, comm, root)
    240 
    241         plot.pane = self

~/anaconda3/lib/python3.8/site-packages/panel/pane/holoviews.py in _render(self, doc, comm, root)
    304                 kwargs['comm'] = comm
    305 
--> 306         return renderer.get_plot(self.object, **kwargs)
    307 
    308     def _cleanup(self, root):

~/anaconda3/lib/python3.8/site-packages/holoviews/plotting/bokeh/renderer.py in get_plot(self_or_cls, obj, doc, renderer, **kwargs)
     71         combining the bokeh model with another plot.
     72         """
---> 73         plot = super(BokehRenderer, self_or_cls).get_plot(obj, doc, renderer, **kwargs)
     74         if plot.document is None:
     75             plot.document = Document() if self_or_cls.notebook_context else curdoc()

~/anaconda3/lib/python3.8/site-packages/holoviews/plotting/renderer.py in get_plot(self_or_cls, obj, doc, renderer, comm, **kwargs)
    236             if isinstance(obj, AdjointLayout):
    237                 obj = Layout(obj)
--> 238             plot = self_or_cls.plotting_class(obj)(obj, renderer=renderer,
    239                                                    **plot_opts)
    240             defaults = [kd.default for kd in plot.dimensions]

~/anaconda3/lib/python3.8/site-packages/holoviews/plotting/bokeh/plot.py in __init__(self, layout, keys, **params)
    706     def __init__(self, layout, keys=None, **params):
    707         super(LayoutPlot, self).__init__(layout, keys=keys, **params)
--> 708         self.layout, self.subplots, self.paths = self._init_layout(layout)
    709         if self.top_level:
    710             self.traverse(lambda x: attach_streams(self, x.hmap, 2),

~/anaconda3/lib/python3.8/site-packages/holoviews/plotting/bokeh/plot.py in _init_layout(self, layout)
    718         frame_ranges = self.compute_ranges(layout, None, None)
    719         keys = self.keys[:1] if self.dynamic else self.keys
--> 720         frame_ranges = OrderedDict([(key, self.compute_ranges(layout, key, frame_ranges))
    721                                     for key in keys])
    722         layout_items = layout.grid_items()

~/anaconda3/lib/python3.8/site-packages/holoviews/plotting/bokeh/plot.py in <listcomp>(.0)
    718         frame_ranges = self.compute_ranges(layout, None, None)
    719         keys = self.keys[:1] if self.dynamic else self.keys
--> 720         frame_ranges = OrderedDict([(key, self.compute_ranges(layout, key, frame_ranges))
    721                                     for key in keys])
    722         layout_items = layout.grid_items()

~/anaconda3/lib/python3.8/site-packages/holoviews/plotting/plot.py in compute_ranges(self, obj, key, ranges)
    636             if (not (axiswise and not isinstance(obj, HoloMap)) or
    637                 (not framewise and isinstance(obj, HoloMap))):
--> 638                 self._compute_group_range(group, elements, ranges, framewise,
    639                                           axiswise, robust, self.top_level,
    640                                           prev_frame)

~/anaconda3/lib/python3.8/site-packages/holoviews/plotting/plot.py in _compute_group_range(cls, group, elements, ranges, framewise, axiswise, robust, top_level, prev_frame)
    853                     continue
    854                 matching &= (
--> 855                     len({'date' if isinstance(v, util.datetime_types) else 'number'
    856                          for rng in rs for v in rng if util.isfinite(v)}) < 2
    857                 )

~/anaconda3/lib/python3.8/site-packages/holoviews/plotting/plot.py in <setcomp>(.0)
    854                 matching &= (
    855                     len({'date' if isinstance(v, util.datetime_types) else 'number'
--> 856                          for rng in rs for v in rng if util.isfinite(v)}) < 2
    857                 )
    858             if matching:

~/anaconda3/lib/python3.8/site-packages/holoviews/core/util.py in isfinite(val)
    902         return finite
    903     elif isinstance(val, datetime_types+timedelta_types):
--> 904         return not isnat(val)
    905     elif isinstance(val, (basestring, bytes)):
    906         return True

~/anaconda3/lib/python3.8/site-packages/holoviews/core/util.py in isnat(val)
    866     elif pd and val is pd.NaT:
    867         return True
--> 868     elif pd and isinstance(val, pandas_datetime_types+pandas_timedelta_types):
    869         return pd.isna(val)
    870     else:

NameError: name 'pandas_datetime_types' is not defined

[N4321D]

related to:
#5009

[github-actions]

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