Python Multi Series Range Bar Chart using Django

Download Python Django Chart Samples

Example shows Python Multi Series Range Bar Chart where bars from different series sharing same x-value are placed one below the other. Demo also includes Django source code that you can try running locally.

<!-- index.html -->
{% load static %}
<html>
<head>
<title>CanvasJS Python Charts</title>
<script>
  window.onload = function () {
    var chart = new CanvasJS.Chart("chartContainer", {
      theme: "dark1",
      animationEnabled: true,
      title: {
        text: "Temperature Variation Comparison",
        fontFamily: "Arial"
      },
      axisY: {
        valueFormatString: "#0.##°C",
        title: "Temperature (°C)"
      },
      axisX: {
        valueFormatString: "MMM"
      },
      toolTip: {
        shared: true
      },
      legend: {
        verticalAlign: "top",
        cursor: "pointer",
        itemclick: hideUnhideDataSeries
      },
      data: [{
          type: "rangeBar",
          name: "Denver",
          showInLegend: true,
          legendText: "Denver, CO",
          yValueFormatString: "#0.##°C",
          xValueFormatString: "MMM YYYY",
          xValueType: "dateTime",
          markerSize: 0,
          content: "<b>{name}</b> Min: {y[0]}, Max: {y[1]}",
          bevelEnabled: true,
          dataPoints: {{ denver_weather_data|safe }}
      },{
          type: "rangeBar",
          name: "Seattle",
          showInLegend: true,
          legendText: "Seattle, WA",
          yValueFormatString: "#0.##°C",
          xValueFormatString: "MMM YYYY",
          xValueType: "dateTime",
          markerSize: 0,
          bevelEnabled: true,
          content: "<b>{name}</b> Min: {y[0]}, Max: {y[1]}",
          dataPoints: {{ seattle_weather_data|safe }}
      }]
    });
    chart.render();

    function hideUnhideDataSeries(e) {
      if (typeof (e.dataSeries.visible) === "undefined" || e.dataSeries.visible) {
        e.dataSeries.visible = false;
      } else {
        e.dataSeries.visible = true;
      }
      e.chart.render();
    }
  }
</script>
</head>
<body>
    <div id="chartContainer" style="width: 100%; height: 360px;"></div>
    <script src="{% static 'canvasjs.min.js' %}"></script>
</body>
</html>                              
from django.shortcuts import render

def index(request):
    denver_weather_data = [
        { "x": 1609459200000, "y": [-20, 19.4444] },
        { "x": 1612137600000, "y": [-27.8, 21.1111] },
        { "x": 1614556800000, "y": [-15, 25.6] },
        { "x": 1617235200000, "y": [-16.7, 28.8889] },
        { "x": 1619827200000, "y": [-6.1, 32.2] },
        { "x": 1622505600000, "y": [-0.6, 40] },
        { "x": 1625097600000, "y": [5.6, 40.6] },
        { "x": 1627776000000, "y": [3.3, 37.8] },
        { "x": 1630454400000, "y": [-2.2, 38.3] },
        { "x": 1633046400000, "y": [-7.8, 31.1] },
        { "x": 1635724800000, "y": [-13.3, 28.3] },
        { "x": 1638316800000, "y": [-17.8, 27.8] }
    ]

    seattle_weather_data = [
        { "x": 1609459200000, "y": [-9.4, 15] },
        { "x": 1612137600000, "y": [-8.9, 12.8] },
        { "x": 1614556800000, "y": [-4.389, 20] },
        { "x": 1617235200000, "y": [-5, 27.2222] },
        { "x": 1619827200000, "y": [0.6, 27.8] },
        { "x": 1622505600000, "y": [2.8, 44.4] },
        { "x": 1625097600000, "y": [6.722, 35] },
        { "x": 1627776000000, "y": [6, 36.1] },
        { "x": 1630454400000, "y": [1.7, 29.4444] },
        { "x": 1633046400000, "y": [-2.8, 22.2] },
        { "x": 1635724800000, "y": [-4.4, 18.3] },
        { "x": 1638316800000, "y": [-13.3, 15.5556] }
    ]

    return render(request, 'index.html', { "denver_weather_data" : denver_weather_data, "seattle_weather_data": seattle_weather_data })

Chart Customizations

Indexlabels can be shown for the datapoints using indexLabel property. The placement &orientation of indexlabels can be customized using indexLabelPlacement &indexLabelOrientation properties. Some other commonly used customization includes indexLabelFontSize, indexLabelBackgroundColor, etc.