实验五-旭日图

实验：PyEcharts 旭日图
目的：了解并掌握 PyEcharts 库来制作旭日图
原理：Pyecharts是一个用于生成Echarts 图表的类库，可以与Python进行对接，方便在 Python中直接
生成图形。Echarts是百度开源的一个数据可视化JS库,它实现的可视化效果非常美观，凭借着良好的交互
性、精巧的图表设计,得到了众多开发者的认可。
要求：
使用数据库中的订单表（orders）中的数据，绘制如下所示的不同分类下的商品销售额旭日图。

 代码：

方法1;

from sqlalchemy import create_engine 
import pandas as pd

from pyecharts import options as opts

from pyecharts.charts import Sunburst

engine = create_engine('mysql+pymysql://root:root@localhost:3306/sales')
sql = '''SELECT DISTINCT category FROM orders'''

df = pd.read_sql(sql, engine)

data = []
for c in df['category']:
    sql = '''
    SELECT subcategory AS 'sc',
    ROUND(SUM(sales) / 10000, 2) AS 's'
    FROM orders
    WHERE category = '{}'
    GROUP BY subcategory
    '''.format(c)

    subdf = pd.read_sql(sql, engine)
    cs = [opts.SunburstItem(name=row['sc'], value=row['s']) for (i, row) in
subdf.iterrows()]

    data.append(opts.SunburstItem(name=c, children=cs))


(
    Sunburst()
    .add(series_name="商品销售额", data_pair=data, radius=[0, "85%"])
    .set_global_opts(
        title_opts=opts.TitleOpts(title="不同分类下的商品销售额旭日图"),
        toolbox_opts=opts.ToolboxOpts())
    .set_series_opts(label_opts=opts.LabelOpts(formatter="{b}"))
).render('旭日图.html')

方法2：

from sqlalchemy import create_engine
import pandas as pd

from pyecharts import options as opts
from pyecharts.charts import Sunburst


engine = create_engine('mysql+pymysql://root:root@localhost:3306/sales')
sql = '''
SELECT
category AS 'c',
subcategory AS 'sc',
ROUND(SUM(sales) / 10000, 2) AS 's'
FROM orders
GROUP BY category, subcategory
'''

df = pd.read_sql(sql, engine)


dt = {}

for (i, row) in df.iterrows():
    c = row['c']
    v = opts.SunburstItem(name=row['sc'], value=row['s'])

    if c in dt:
        dt[c]['children'].append(v)
    else:
        dt[c] = {
            'name': c,
            'children': [v]
        }

data = [opts.SunburstItem(name=c, children=v['children']) for (k, v) in
dt.items()]


(
    Sunburst()
    .add(series_name="商品销售额", data_pair=data, radius=[0, "85%"])
    .set_global_opts(title_opts=opts.TitleOpts(title="不同分类下的商品销售额旭日
图"),toolbox_opts=opts.ToolboxOpts())
    .set_series_opts(label_opts=opts.LabelOpts(formatter="{b}"))
).render('旭日图.html')