Steps to draw a funnel chart using ECharts and Python interface

Steps to draw a funnel chart using ECharts and Python interface

The funnel chart is a visual chart used to display multiple stages of data. It is usually used to represent Conversion rate or volume ratio at each stage in a process. Before using ECharts and Python interfaces to draw funnel charts, you need to install the corresponding libraries and plug-ins, and then follow the steps below.

Step 1: Install the necessary libraries and plug-ins
Before using ECharts and Python interfaces to draw funnel charts, you need to ensure that the corresponding libraries and plug-ins have been installed. First, you need to install the ECharts library of Python, which can be installed using the following command:

pip install pyecharts

In addition, you also need to install the echarts-gl plug-in officially provided by ECharts, which can be installed using the following command:

pip install echarts-gl

Step 2: Import the necessary libraries and modules
After installing the necessary libraries and plug-ins, you need to import the corresponding libraries and modules into the Python program, including the pyecharts and pyecharts.globals modules. Examples are as follows:

from pyecharts import options as opts
from pyecharts.charts import Funnel
from pyecharts.globals import ThemeType

Step 3: Prepare data
Before drawing the funnel chart, you need to prepare the corresponding data. Data can be stored using lists or dictionaries in Python. Suppose there is data about a sales funnel, including the names and quantities of each stage. The example is as follows:

data = [
    ("访问", 15654),
    ("咨询", 12345),
    ("订单", 9523),
    ("点击", 7654),
    ("展现", 3421)
]

Step 4: Configure the funnel chart
Before drawing the funnel chart, you need to make the corresponding configuration, including the title, Topics, chart sizes, etc. An example is as follows:

funnel = (
    Funnel(init_opts=opts.InitOpts(theme=ThemeType.LIGHT))
    .add(
        series_name="",
        data_pair=data,
        gap=2,
        tooltip_opts=opts.TooltipOpts(trigger="item", formatter="{a} <br/>{b}: {c}"),
        label_opts=opts.LabelOpts(is_show=True, formatter="{b}: {c}")
    )
    .set_global_opts(
        title_opts=opts.TitleOpts(title="销售漏斗图", subtitle="数据来源"),
        legend_opts=opts.LegendOpts(is_show=False)
    )
    .set_series_opts(label_opts=opts.LabelOpts(position="inside"))
)

Step 5: Generate funnel chart
Use the render method to generate the funnel chart into an HTML file or display it in Jupyter Notebook. An example is as follows:

funnel.render("funnel_chart.html")

At this point, all steps of drawing a funnel chart using ECharts and Python interfaces have been completed. You can get the final funnel chart by viewing the generated HTML file or displaying it in Jupyter Notebook.

Summary:
This article introduces the specific steps to draw a funnel chart using ECharts and Python interfaces, and provides corresponding code examples. Through the above steps, you can easily use ECharts and Python to draw a beautiful and practical funnel chart to display and analyze the data more intuitively and clearly.

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