Merge pull request #813 from alemirone/master

Thanks!

Author: vasole

PyMca5/PyMcaGraph/backends/MatplotlibBackend.py

@@ -1716,7 +1716,7 @@ def addCurve(self, x, y, legend=None, info=None, replace=False, replot=True,
         if selectable:
             picker = True
         else:
-            picker = None
+            picker = False
         scatterPlot = False
         if hasattr(color, "dtype"):
             if len(color) == len(x):
@@ -2094,7 +2094,7 @@ def insertMarker(self, x, y, legend=None, text=None, color='k',
             line = self.ax.plot(x, y, label=legend,
                                       linestyle=" ",
                                       color=color,
-                                      picker=None,
+                                      picker=False,
                                       marker=symbol,
                                       markersize=markersize)[-1]
         if text is not None:
@@ -2605,7 +2605,7 @@ def addImage(self, data, legend=None, info=None,
         if selectable or draggable:
             picker = True
         else:
-            picker = None
+            picker = False
         shape = data.shape
         if 0:
             # this supports non regularly spaced coordenates!!!!