plotly · nicolaskruchten · Jun 28, 2021 · Jun 28, 2021
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -2,6 +2,13 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## UNRELEASED
+
+- Updated Plotly.js to from version 2.1.0 to version 2.2.0. See the [plotly.js CHANGELOG](https://github.com/plotly/plotly.js/blob/master/CHANGELOG.md#220----2021-06-28) for more information. These changes are reflected in the auto-generated `plotly.graph_objects` module. Notable changes include:
+  - new `<trace>.legendgrouptitle` attribute for legend group titles
+  - new `%h` text formatting directive for half-years
+  - performance improvements and bug fixes
+
 
 ## [5.0.0] - 2021-06-21
 

diff --git a/packages/javascript/jupyterlab-plotly/package-lock.json b/packages/javascript/jupyterlab-plotly/package-lock.json
diff --git a/packages/javascript/jupyterlab-plotly/package.json b/packages/javascript/jupyterlab-plotly/package.json
@@ -65,7 +65,7 @@
     "@lumino/messaging": "^1.2.3",
     "@lumino/widgets": "^1.8.1",
     "lodash": "^4.17.4",
-    "plotly.js": "^2.1.0"
+    "plotly.js": "^2.2.0"
   },
   "jupyterlab": {
     "extension": "lib/jupyterlab-plugin",

diff --git a/packages/python/plotly/codegen/resources/plot-schema.json b/packages/python/plotly/codegen/resources/plot-schema.json
diff --git a/packages/python/plotly/plotly/graph_objs/_bar.py b/packages/python/plotly/plotly/graph_objs/_bar.py
@@ -32,6 +32,7 @@ class Bar(_BaseTraceType):
         "insidetextanchor",
         "insidetextfont",
         "legendgroup",
+        "legendgrouptitle",
         "legendrank",
         "marker",
         "meta",
@@ -797,6 +798,34 @@ def legendgroup(self):
     def legendgroup(self, val):
         self["legendgroup"] = val
 
+    # legendgrouptitle
+    # ----------------
+    @property
+    def legendgrouptitle(self):
+        """
+        The 'legendgrouptitle' property is an instance of Legendgrouptitle
+        that may be specified as:
+          - An instance of :class:`plotly.graph_objs.bar.Legendgrouptitle`
+          - A dict of string/value properties that will be passed
+            to the Legendgrouptitle constructor
+
+            Supported dict properties:
+
+                font
+                    Sets this legend group's title font.
+                text
+                    Sets the title of the legend group.
+
+        Returns
+        -------
+        plotly.graph_objs.bar.Legendgrouptitle
+        """
+        return self["legendgrouptitle"]
+
+    @legendgrouptitle.setter
+    def legendgrouptitle(self, val):
+        self["legendgrouptitle"] = val
+
     # legendrank
     # ----------
     @property
@@ -1765,12 +1794,16 @@ def xcalendar(self, val):
     @property
     def xhoverformat(self):
         """
-        Sets the hover text formatting rule for `x`  using d3
-        formatting mini-languages which are very similar to those in
-        Python. See: https://github.com/d3/d3-3.x-api-
-        reference/blob/master/Formatting.md#d3_format And for dates
-        see: https://github.com/d3/d3-time-format#locale_format By
-        default the values are formatted using `xaxis.hoverformat`.
+        Sets the hover text formatting rulefor `x`  using d3 formatting
+        mini-languages which are very similar to those in Python. For
+        numbers, see: https://github.com/d3/d3-3.x-api-
+        reference/blob/master/Formatting.md#d3_format. And for dates
+        see: https://github.com/d3/d3-time-format#locale_format. We add
+        two items to d3's date formatter: "%h" for half of the year as
+        a decimal number as well as "%{n}f" for fractional seconds with
+        n digits. For example, *2016-10-13 09:15:23.456* with
+        tickformat "%H~%M~%S.%2f" would display *09~15~23.46*By default
+        the values are formatted using `xaxis.hoverformat`.
 
         The 'xhoverformat' property is a string and must be specified as:
           - A string
@@ -1968,12 +2001,16 @@ def ycalendar(self, val):
     @property
     def yhoverformat(self):
         """
-        Sets the hover text formatting rule for `y`  using d3
-        formatting mini-languages which are very similar to those in
-        Python. See: https://github.com/d3/d3-3.x-api-
-        reference/blob/master/Formatting.md#d3_format And for dates
-        see: https://github.com/d3/d3-time-format#locale_format By
-        default the values are formatted using `yaxis.hoverformat`.
+        Sets the hover text formatting rulefor `y`  using d3 formatting
+        mini-languages which are very similar to those in Python. For
+        numbers, see: https://github.com/d3/d3-3.x-api-
+        reference/blob/master/Formatting.md#d3_format. And for dates
+        see: https://github.com/d3/d3-time-format#locale_format. We add
+        two items to d3's date formatter: "%h" for half of the year as
+        a decimal number as well as "%{n}f" for fractional seconds with
+        n digits. For example, *2016-10-13 09:15:23.456* with
+        tickformat "%H~%M~%S.%2f" would display *09~15~23.46*By default
+        the values are formatted using `yaxis.hoverformat`.
 
         The 'yhoverformat' property is a string and must be specified as:
           - A string
@@ -2195,6 +2232,9 @@ def _prop_descriptions(self):
             Sets the legend group for this trace. Traces part of
             the same legend group hide/show at the same time when
             toggling legend items.
+        legendgrouptitle
+            :class:`plotly.graph_objects.bar.Legendgrouptitle`
+            instance or dict with compatible properties
         legendrank
             Sets the legend rank for this trace. Items and groups
             with smaller ranks are presented on top/left side while
@@ -2361,13 +2401,19 @@ def _prop_descriptions(self):
         xcalendar
             Sets the calendar system to use with `x` date data.
         xhoverformat
-            Sets the hover text formatting rule for `x`  using d3
+            Sets the hover text formatting rulefor `x`  using d3
             formatting mini-languages which are very similar to
-            those in Python. See: https://github.com/d3/d3-3.x-api-
-            reference/blob/master/Formatting.md#d3_format And for
+            those in Python. For numbers, see:
+            https://github.com/d3/d3-3.x-api-
+            reference/blob/master/Formatting.md#d3_format. And for
             dates see: https://github.com/d3/d3-time-
-            format#locale_format By default the values are
-            formatted using `xaxis.hoverformat`.
+            format#locale_format. We add two items to d3's date
+            formatter: "%h" for half of the year as a decimal
+            number as well as "%{n}f" for fractional seconds with n
+            digits. For example, *2016-10-13 09:15:23.456* with
+            tickformat "%H~%M~%S.%2f" would display *09~15~23.46*By
+            default the values are formatted using
+            `xaxis.hoverformat`.
         xperiod
             Only relevant when the axis `type` is "date". Sets the
             period positioning in milliseconds or "M<n>" on the x
@@ -2401,13 +2447,19 @@ def _prop_descriptions(self):
         ycalendar
             Sets the calendar system to use with `y` date data.
         yhoverformat
-            Sets the hover text formatting rule for `y`  using d3
+            Sets the hover text formatting rulefor `y`  using d3
             formatting mini-languages which are very similar to
-            those in Python. See: https://github.com/d3/d3-3.x-api-
-            reference/blob/master/Formatting.md#d3_format And for
+            those in Python. For numbers, see:
+            https://github.com/d3/d3-3.x-api-
+            reference/blob/master/Formatting.md#d3_format. And for
             dates see: https://github.com/d3/d3-time-
-            format#locale_format By default the values are
-            formatted using `yaxis.hoverformat`.
+            format#locale_format. We add two items to d3's date
+            formatter: "%h" for half of the year as a decimal
+            number as well as "%{n}f" for fractional seconds with n
+            digits. For example, *2016-10-13 09:15:23.456* with
+            tickformat "%H~%M~%S.%2f" would display *09~15~23.46*By
+            default the values are formatted using
+            `yaxis.hoverformat`.
         yperiod
             Only relevant when the axis `type` is "date". Sets the
             period positioning in milliseconds or "M<n>" on the y
@@ -2455,6 +2507,7 @@ def __init__(
         insidetextanchor=None,
         insidetextfont=None,
         legendgroup=None,
+        legendgrouptitle=None,
         legendrank=None,
         marker=None,
         meta=None,
@@ -2625,6 +2678,9 @@ def __init__(
             Sets the legend group for this trace. Traces part of
             the same legend group hide/show at the same time when
             toggling legend items.
+        legendgrouptitle
+            :class:`plotly.graph_objects.bar.Legendgrouptitle`
+            instance or dict with compatible properties
         legendrank
             Sets the legend rank for this trace. Items and groups
             with smaller ranks are presented on top/left side while
@@ -2791,13 +2847,19 @@ def __init__(
         xcalendar
             Sets the calendar system to use with `x` date data.
         xhoverformat
-            Sets the hover text formatting rule for `x`  using d3
+            Sets the hover text formatting rulefor `x`  using d3
             formatting mini-languages which are very similar to
-            those in Python. See: https://github.com/d3/d3-3.x-api-
-            reference/blob/master/Formatting.md#d3_format And for
+            those in Python. For numbers, see:
+            https://github.com/d3/d3-3.x-api-
+            reference/blob/master/Formatting.md#d3_format. And for
             dates see: https://github.com/d3/d3-time-
-            format#locale_format By default the values are
-            formatted using `xaxis.hoverformat`.
+            format#locale_format. We add two items to d3's date
+            formatter: "%h" for half of the year as a decimal
+            number as well as "%{n}f" for fractional seconds with n
+            digits. For example, *2016-10-13 09:15:23.456* with
+            tickformat "%H~%M~%S.%2f" would display *09~15~23.46*By
+            default the values are formatted using
+            `xaxis.hoverformat`.
         xperiod
             Only relevant when the axis `type` is "date". Sets the
             period positioning in milliseconds or "M<n>" on the x
@@ -2831,13 +2893,19 @@ def __init__(
         ycalendar
             Sets the calendar system to use with `y` date data.
         yhoverformat
-            Sets the hover text formatting rule for `y`  using d3
+            Sets the hover text formatting rulefor `y`  using d3
             formatting mini-languages which are very similar to
-            those in Python. See: https://github.com/d3/d3-3.x-api-
-            reference/blob/master/Formatting.md#d3_format And for
+            those in Python. For numbers, see:
+            https://github.com/d3/d3-3.x-api-
+            reference/blob/master/Formatting.md#d3_format. And for
             dates see: https://github.com/d3/d3-time-
-            format#locale_format By default the values are
-            formatted using `yaxis.hoverformat`.
+            format#locale_format. We add two items to d3's date
+            formatter: "%h" for half of the year as a decimal
+            number as well as "%{n}f" for fractional seconds with n
+            digits. For example, *2016-10-13 09:15:23.456* with
+            tickformat "%H~%M~%S.%2f" would display *09~15~23.46*By
+            default the values are formatted using
+            `yaxis.hoverformat`.
         yperiod
             Only relevant when the axis `type` is "date". Sets the
             period positioning in milliseconds or "M<n>" on the y
@@ -2983,6 +3051,10 @@ def __init__(
         _v = legendgroup if legendgroup is not None else _v
         if _v is not None:
             self["legendgroup"] = _v
+        _v = arg.pop("legendgrouptitle", None)
+        _v = legendgrouptitle if legendgrouptitle is not None else _v
+        if _v is not None:
+            self["legendgrouptitle"] = _v
         _v = arg.pop("legendrank", None)
         _v = legendrank if legendrank is not None else _v
         if _v is not None:

diff --git a/packages/python/plotly/plotly/graph_objs/_barpolar.py b/packages/python/plotly/plotly/graph_objs/_barpolar.py
@@ -25,6 +25,7 @@ class Barpolar(_BaseTraceType):
         "ids",
         "idssrc",
         "legendgroup",
+        "legendgrouptitle",
         "legendrank",
         "marker",
         "meta",
@@ -462,6 +463,34 @@ def legendgroup(self):
     def legendgroup(self, val):
         self["legendgroup"] = val
 
+    # legendgrouptitle
+    # ----------------
+    @property
+    def legendgrouptitle(self):
+        """
+        The 'legendgrouptitle' property is an instance of Legendgrouptitle
+        that may be specified as:
+          - An instance of :class:`plotly.graph_objs.barpolar.Legendgrouptitle`
+          - A dict of string/value properties that will be passed
+            to the Legendgrouptitle constructor
+
+            Supported dict properties:
+
+                font
+                    Sets this legend group's title font.
+                text
+                    Sets the title of the legend group.
+
+        Returns
+        -------
+        plotly.graph_objs.barpolar.Legendgrouptitle
+        """
+        return self["legendgrouptitle"]
+
+    @legendgrouptitle.setter
+    def legendgrouptitle(self, val):
+        self["legendgrouptitle"] = val
+
     # legendrank
     # ----------
     @property
@@ -1305,6 +1334,9 @@ def _prop_descriptions(self):
             Sets the legend group for this trace. Traces part of
             the same legend group hide/show at the same time when
             toggling legend items.
+        legendgrouptitle
+            :class:`plotly.graph_objects.barpolar.Legendgrouptitle`
+            instance or dict with compatible properties
         legendrank
             Sets the legend rank for this trace. Items and groups
             with smaller ranks are presented on top/left side while
@@ -1449,6 +1481,7 @@ def __init__(
         ids=None,
         idssrc=None,
         legendgroup=None,
+        legendgrouptitle=None,
         legendrank=None,
         marker=None,
         meta=None,
@@ -1569,6 +1602,9 @@ def __init__(
             Sets the legend group for this trace. Traces part of
             the same legend group hide/show at the same time when
             toggling legend items.
+        legendgrouptitle
+            :class:`plotly.graph_objects.barpolar.Legendgrouptitle`
+            instance or dict with compatible properties
         legendrank
             Sets the legend rank for this trace. Items and groups
             with smaller ranks are presented on top/left side while
@@ -1790,6 +1826,10 @@ def __init__(
         _v = legendgroup if legendgroup is not None else _v
         if _v is not None:
             self["legendgroup"] = _v
+        _v = arg.pop("legendgrouptitle", None)
+        _v = legendgrouptitle if legendgrouptitle is not None else _v
+        if _v is not None:
+            self["legendgrouptitle"] = _v
         _v = arg.pop("legendrank", None)
         _v = legendrank if legendrank is not None else _v
         if _v is not None: