Fix matplotlib auto-magic detect bar graph series name (issue #518)

clearml/utilities/plotlympl/renderer.py

@@ -56,6 +56,7 @@ class PlotlyRenderer(Renderer):
         self.current_mpl_ax = None
         self.bar_containers = None
         self.current_bars = []
+        self.current_bars_names = []
         self.axis_ct = 0
         self.x_is_mpl_date = False
         self.mpl_x_bounds = (0, 1)
@@ -197,6 +198,12 @@ class PlotlyRenderer(Renderer):
         ax -- an mpl axes object, not required at this time.
 
         """
+        if self.current_bars:
+            # noinspection PyBroadException
+            try:
+                self.current_bars_names = [n.get_text() for n in ax.legend().texts]
+            except Exception:
+                pass
         self.draw_bars(self.current_bars)
         self.msg += "  Closing axes\n"
         self.x_is_mpl_date = False
@@ -213,10 +220,10 @@ class PlotlyRenderer(Renderer):
                     if bar_props["mplobj"] in container
                 ]
             )
-        for trace in mpl_traces:
-            self.draw_bar(trace)
+        for i, trace in enumerate(mpl_traces):
+            self.draw_bar(trace, self.current_bars_names[i] if i < len(self.current_bars_names) else None)
 
-    def draw_bar(self, coll):
+    def draw_bar(self, coll, name=None):
         """Draw a collection of similar patches as a bar chart.
 
         After bars are sorted, an appropriate data dictionary must be created
@@ -302,6 +309,8 @@ class PlotlyRenderer(Renderer):
                 line=dict(width=trace[0]["edgewidth"]),
             ),
         )  # TODO ditto
+        if name:
+            bar["name"] = name
         if len(bar["x"]) > 1:
             self.msg += "    Heck yeah, I drew that bar chart\n"
             self.plotly_fig['data'].append(bar)