请可以有人帮助.我想到导出%更改值从值（粗体）到excel.但我得到消息
KeyError：“未找到'columns'中指定的所有名称”

import pandas as pd
# import openpyxl module
#import openpyxl
import numpy as np

# Give the location of the file
path = 'C:/Users/a1b.xlsx'
df= pd.read_excel(path, sheet_name='Sheet1', usecols=['Date','name', 'myname', 'fx'])
ds= pd.read_excel(path, sheet_name='Sheet1', usecols=['Date'])
df2= pd.read_excel(path, sheet_name='Sheet1', usecols=['Date','name1', 'myname1', 'fx1'])
#print (df2)
df3= df.copy()

df[['name','myname','fx']] = df[['name','myname','fx']].pct_change(periods = 5)

**a= df2[np.array(df)> np.array(df2)]**

print (a)


a.to_excel(''C:/Users/a1b.xlsx', sheet_name='Sheet3',startcol=2,index=False,columns= ['Date','name', 'myname', 'fx'])

我期望的值来自a= df2[np.array（df）〉np.array（df2）]