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diff --git a/src/third_party/wiredtiger/tools/wtperf_stats/3rdparty/nvd3/pieChart.py b/src/third_party/wiredtiger/tools/wtperf_stats/3rdparty/nvd3/pieChart.py
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+++ b/src/third_party/wiredtiger/tools/wtperf_stats/3rdparty/nvd3/pieChart.py
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+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+"""
+Python-nvd3 is a Python wrapper for NVD3 graph library.
+NVD3 is an attempt to build re-usable charts and chart components
+for d3.js without taking away the power that d3.js gives you.
+
+Project location : https://github.com/areski/python-nvd3
+"""
+
+from .NVD3Chart import NVD3Chart, stab
+
+
+class pieChart(NVD3Chart):
+    """
+    A pie chart (or a circle graph) is a circular chart divided into sectors,
+    illustrating numerical proportion. In chart, the arc length of each sector
+    is proportional to the quantity it represents.
+
+    .. image:: ../_static/screenshot/pieChart.png
+
+    Python example::
+
+        from nvd3 import pieChart
+        chart = pieChart(name='pieChart', color_category='category20c', height=400, width=400)
+
+        xdata = ["Orange", "Banana", "Pear", "Kiwi", "Apple", "Strawberry", "Pineapple"]
+        ydata = [3, 4, 0, 1, 5, 7, 3]
+
+        extra_serie = {"tooltip": {"y_start": "", "y_end": " cal"}}
+        chart.add_serie(y=ydata, x=xdata, extra=extra_serie)
+        chart.buildhtml()
+
+    Javascript generated::
+
+        data = [{ key: "Cumulative Return",
+                  values: [
+                    {
+                      "label": "One",
+                      "value" : 29.765957771107
+                    },
+                    {
+                      "label": "Two",
+                      "value" : 0
+                    },
+                    {
+                      "label": "Three",
+                      "value" : 32.807804682612
+                    },
+                  ]
+                }]
+
+        nv.addGraph(function() {
+            var chart = nv.models.pieChart()
+              .x(function(d) { return d.label })
+              .y(function(d) { return d.value })
+              .showLabels(true);
+
+            chart.color(d3.scale.category20c().range());
+
+            chart.tooltipContent(function(key, y, e, graph) {
+                var x = String(key);
+                var y =  String(y)  + ' cal';
+                tooltip_str = '<center><b>'+x+'</b></center>' + y;
+                return tooltip_str;
+            });
+
+            d3.select("#div_id")
+                .datum(data)
+                .transition()
+                .duration(1200)
+                .call(chart);
+
+          return chart;
+        });
+    """
+    def __init__(self, **kwargs):
+        NVD3Chart.__init__(self, **kwargs)
+        height = kwargs.get('height', 450)
+        width = kwargs.get('width', None)
+
+        self.create_x_axis('xAxis', format=None)
+        self.create_y_axis('yAxis', format=None)
+        # must have a specified height, otherwise it superimposes both chars
+        if height:
+            self.set_graph_height(height)
+        if width:
+            self.set_graph_width(width)
+
+    def buildjschart(self):
+        NVD3Chart.buildjschart(self)
+
+        color_js = ''
+        if self.color_list:
+            color_js += "var mycolor = new Array();\n"
+            color_count = 0
+            for i in self.color_list:
+                color_js += stab(2) + "mycolor[" + str(color_count) + "] = '" + i + "';\n"
+                color_count = int(color_count) + 1
+
+        # add mycolor var in js before nv.addGraph starts
+        if self.color_list:
+            start_js = self.jschart.find('nv.addGraph')
+            #start_js_len = len('nv.addGraph')
+            replace_index = start_js
+            if start_js > 0:
+                self.jschart = self.jschart[:replace_index] + color_js + self.jschart[replace_index:]
+
+        pie_jschart = '\n' + stab(2) + 'chart.x(function(d) { return d.label })\n' + \
+            stab(3) + '.y(function(d) { return d.value });\n'
+        if self.width:
+            pie_jschart += stab(2) + 'chart.width(%s);\n' % self.width
+        if self.height:
+            pie_jschart += stab(2) + 'chart.height(%s);\n' % self.height
+
+        # add custom colors for pieChart
+        if self.color_list and color_js:
+            pie_jschart += stab(2) + 'chart.color(mycolor);\n'
+
+        start_index = self.jschart.find('.pieChart();')
+        string_len = len('.pieChart();')
+        replace_index = start_index + string_len
+        if start_index > 0:
+            self.jschart = self.jschart[:replace_index] + pie_jschart + self.jschart[replace_index:]