Export polar frame properties in mplexporter

Author: robertoffmoura

plotly/matplotlylib/mplexporter/utils.py

@@ -308,6 +308,17 @@ def get_axes_properties(ax):
         "axes": [get_axis_properties(ax.xaxis), get_axis_properties(ax.yaxis)],
     }
 
+    if getattr(ax, "name", None) == "polar":
+        frame = ax.spines.get("polar")
+        if frame is not None:
+            props["polar_frame"] = {
+                "color": export_color(frame.get_edgecolor()),
+                "linewidth": frame.get_linewidth(),
+                "visible": frame.get_visible(),
+            }
+        else:
+            props["polar_frame"] = None
+
     for axname in ["x", "y"]:
         axis = getattr(ax, axname + "axis")
         domain = getattr(ax, "get_{0}lim".format(axname))()

plotly/matplotlylib/renderer.py

@@ -136,7 +136,7 @@ def _open_polar_axes(self, ax, props):
             if len(radial_gridlines)
             else ("#b0b0b0", True)
         )
-        frame = ax.spines.get("polar")
+        frame = props.get("polar_frame")
         self.plotly_fig["layout"][self.current_polar_subplot] = go.layout.Polar(
             bgcolor=_export_color(props["axesbg"]),
             angularaxis=dict(
@@ -146,13 +146,9 @@ def _open_polar_axes(self, ax, props):
                 ticktext=[t.get_text() for t in ax.xaxis.get_majorticklabels()],
                 showgrid=angular_grid[1],
                 gridcolor=_export_color(angular_grid[0]),
-                showline=frame.get_visible() if frame is not None else True,
-                linecolor=(
-                    _export_color(frame.get_edgecolor())
-                    if frame is not None
-                    else "black"
-                ),
-                linewidth=frame.get_linewidth() if frame is not None else 1,
+                showline=frame["visible"] if frame else True,
+                linecolor=(_export_color(frame["color"]) if frame else "black"),
+                linewidth=frame["linewidth"] if frame else 1,
             ),
             radialaxis=dict(
                 range=[float(v) for v in ax.get_ylim()],