数据透视表和分组数据在python熊猫中查找均值

Question

  

KeyError：无   在处理上述异常期间，发生了另一个异常   KeyError：无

import numpy as np
import pandas as pd 

df = pd.read_csv('https://query.data.world/s/vBDCsoHCytUSLKkLvq851k2b8JOCkF')
df_1 = pd.pivot(df,values=['rain','wind'],index=['month','day']).mean()
print(df_1.head(20))