pandas - 绘制树图错误：ValueError：“path_0”的值不是“data_frame”中列的名称

Question

我是 plotly 新手并试图绘制树图但收到错误：ValueError: Value of 'path_0' is not the name of a column in 'data_frame'. Expected one of ['country_name', 'counts'] but received: c

示例数据

import pandas as pd
import plotly.express as px
d = {'country_name':['USA', 'UK', 'Germany'], 'counts':[100, 200, 300]}
dd = pd.DataFrame(data=d)

阴谋

fig = px.treemap(dd, path='country_name', values='counts')
fig.show()

不知道为什么我收到此错误。

Answer 1

使用树形图时，您需要将路径设置为列表，如下所示：

import pandas as pd
import plotly.express as px
d = {'country_name':['USA', 'UK', 'Germany'], 'counts':[100, 200, 300]}
dd = pd.DataFrame(data=d)

fig = px.treemap(dd, path=['country_name'], values='counts')
fig.show()