passing some tests on py3, all on py2

rowers/interactiveplots.py

@@ -246,9 +246,12 @@ def interactive_boxchart(datadf,fieldname,extratitle=''):
 
     return script,div
 
-import holoviews as hv
-hv.extension('bokeh')
-renderer = hv.renderer('bokeh')
+try:
+    import holoviews as hv
+    hv.extension('bokeh')
+    renderer = hv.renderer('bokeh')
+except ImportError:
+    pass
 
 def interactive_activitychart(workouts,startdate,enddate,stack='type'):
     
@@ -908,7 +911,12 @@ def interactive_histoall(theworkouts):
                                axis_label="Cumulative % of strokes"),'right')
 
     plot.sizing_mode = 'scale_width'
-    script, div = components(plot)
+    try:
+        script, div = components(plot)
+    except ValueError:
+        script = ''
+        div = ''
+        
     return [script,div]
 
 def course_map(course):
@@ -4249,7 +4257,11 @@ def interactive_otw_advanced_pace_chart(id=0,promember=0):
  
     hover.mode = 'mouse'
 
-    script, div = components(plot)
+    try:
+        script, div = components(plot)
+    except:
+        script = ''
+        div = ''
 
     return [script,div]