fixed 2d_density test again and updated the _convert_to_RGB_255 doc string -- rgb tuple coordinates are rounded down to floor int

Author: Kully

plotly/tests/test_core/test_tools/test_figure_factory.py

@@ -1402,32 +1402,32 @@ def test_2D_density_all_args(self):
             point_size=3, height=800, width=800)
 
         exp_2D_density_chart = {
-            'data': [{'marker': {'color': 'rgb(0.0, 0.0, 127)',
+            'data': [{'marker': {'color': 'rgb(0, 0, 127)',
                       'opacity': 0.4,
                       'size': 3},
                       'mode': 'markers',
                       'name': 'points',
                       'type': 'scatter',
                       'x': [1, 2],
                       'y': [2, 4]},
-                     {'colorscale': [[0.0, 'rgb(122.0, 69.0, 121.0)'],
-                                     [0.25, 'rgb(213.0, 96.0, 115.0)'],
-                                     [0.5, 'rgb(236.0, 158.0, 105.0)'],
-                                     [0.75, 'rgb(255.0, 255.0, 51.0)'],
-                                     [1.0, 'rgb(249.9, 249.9, 249.9)']],
+                     {'colorscale': [[0.0, 'rgb(122, 69, 121)'],
+                                     [0.25, 'rgb(213, 96, 115)'],
+                                     [0.5, 'rgb(236, 158, 105)'],
+                                     [0.75, 'rgb(255, 255, 51)'],
+                                     [1.0, 'rgb(249, 249, 249)']],
                       'name': 'density',
                       'ncontours': 20,
                       'reversescale': True,
                       'showscale': False,
                       'type': 'histogram2dcontour',
                       'x': [1, 2],
                       'y': [2, 4]},
-                     {'marker': {'color': 'rgb(255.0, 237.0, 222.0)'},
+                     {'marker': {'color': 'rgb(255, 237, 222)'},
                       'name': 'x density',
                       'type': 'histogram',
                       'x': [1, 2],
                       'yaxis': 'y2'},
-                     {'marker': {'color': 'rgb(255.0, 237.0, 222.0)'},
+                     {'marker': {'color': 'rgb(255, 237, 222)'},
                       'name': 'y density',
                       'type': 'histogram',
                       'xaxis': 'x2',

plotly/tools.py

@@ -4562,7 +4562,7 @@ def _endpts_to_intervals(endpts):
     @staticmethod
     def _convert_to_RGB_255(colors):
         """
-        Multiplies each element of a triplet by 255 and rounds to nearest int
+        Multiplies each element of a triplet by 255 and rounds to floor int
         """
 
         return (int(colors[0]*255.0),