Added support for compare and compareBase

pandas_highcharts/core.py

@@ -85,7 +85,31 @@ def serialize_pane(df, output, *args, **kwargs):
         pass
 
     def serialize_plotOptions(df, output, *args, **kwargs):
-        pass
+        if "plotOptions" in kwargs:
+
+            plotOptionsDict = {}
+
+            for k1, v1 in kwargs["plotOptions"].items():
+                # add series options
+                if "series" == k1:
+                    # add safety conditions here
+                    for k2, v2 in v1.items():
+                        if k2 == "compare":
+                            if v2 not in ("percent", "value"):
+                                raise(ValueError("compare option in plotOptions - series can only be percent or value"))
+
+                    # add series options to plotOptions
+                    if v1:
+                        plotOptionsDict[k1] = v1
+
+                # every option has not been tested yet
+                else:
+                    plotOptionsDict[k1] = v1
+                    # raise(NotImplementedError("Other plotOptions besides series are not tested yet!"))
+                    # I left this error commented because it is a design choice on where the error should be thrown
+
+            if plotOptionsDict:
+                output["plotOptions"] = plotOptionsDict
 
     def serialize_series(df, output, *args, **kwargs):
         def is_secondary(c, **kwargs):

pandas_highcharts/tests.py

@@ -86,6 +86,19 @@ def test_type(self):
         obj = serialize(df2, render_to='chart', output_type='dict')
         self.assertEqual(obj['series'], [{'data': [('b', 2), ('a', 1)], 'name': 's', 'yAxis': 0}])
 
+    def test_serialize_plotOptions(self):
+
+        # test compare and compareBase
+        plotOptions = {
+            "series":
+                {
+                    "compare": "percent",
+                    "compareBase": 100
+                }
+        }
+        obj = serialize(df, render_to="chart", output_type="dict", plotOptions=plotOptions)
+        self.assertEqual(obj['plotOptions'], plotOptions)
+
     def test_json_output(self):
         json_output = serialize(df, output_type="json")
         self.assertEqual(type(json_output), str)