为什么你需要保存临时.csv文件？你能做一些像下面这样的事情吗？

def enterbtn(df:pd.DataFrame):
    date = dateEntry.get()
    temperature = tempEntry.get()
    df.loc[len(df.index)] = [date, temperature] 
    df.to_excel('data.xlsx', sheet_name='Sheet1')
    #window.destroy()
    print(df)

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在阅读CSV文件之前，您需要关闭CSV文件以使更改生效：

def enterbtn(df:pd.DataFrame):
    date = dateEntry.get()
    temperature = tempEntry.get()
    x = open('storage.csv', 'a')
    writer = csv.writer(x)
    row = [date,temperature]
    writer.writerow(row)
    x.close()  # close the file to save the change
    df = pd.read_csv("storage.csv")
    df.to_excel('data.xlsx', sheet_name='Sheet1')
    #window.destroy()
    print(df)

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