Fix Matplotlib automagic export legend not showing series names (issue #337)

clearml/binding/matplotlib_bind.py

@@ -408,6 +408,22 @@ class PatchedMatplotlib:
                                     plotly_renderer.plotly_fig['layout'][_yaxis].pop('type', None)
                                 except Exception:
                                     pass
+
+                        # try to bring back legend
+                        # noinspection PyBroadException
+                        try:
+                            if plotly_renderer.plotly_fig.get('layout', {}).get('showlegend') and \
+                                    plotly_renderer.plotly_fig.get('data'):
+                                # the legend names is the upper half of the data points:
+                                lines_ = plotly_renderer.plotly_fig['data']
+                                half_mark = len(lines_)//2
+                                if len(lines_) % 2 == 0 and \
+                                        all(l for l in lines_[half_mark:] if not l.get('x') and not l.get('y')):
+                                    for i, line in enumerate(lines_[:half_mark]):
+                                        line['name'] = lines_[i+half_mark].get('name')
+                        except Exception:
+                            pass
+
                         return deepcopy(plotly_renderer.plotly_fig)
 
                     plotly_dict = our_mpl_to_plotly(mpl_fig)

clearml/utilities/plotlympl/mpltools.py

@@ -156,6 +156,7 @@ def merge_color_and_opacity(color, opacity):
     if opacity is None:
         return "rgb {}".format(rgb_tup)
 
+    opacity = int(opacity*255.) if opacity <= 1.0 else int(opacity)
     rgba_tup = rgb_tup + (opacity,)
     return "rgba {}".format(rgba_tup)