python panda修改csv文件不是

Question

我有一个大文件，当我修改这个文件时，我试图保存这个文件，但是终端显示了一个错误。在

 import pandas as pd
 from pandas import DataFrame
 import matplotlib.pyplot as plt 
 import numpy as np 
 def modifydataset():
      df = pd.read_csv('/home/najeeb/Downloads/stocks_sentdex.csv')

      df['time'] = pd.to_datetime(df['time'], unit='s')
      df = df.set_index('time')

      del df['id']

      df.to_csv('stocks_sentdex.csv')
 modifydataset()

终端显示错误：

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