pandas 資料合併寫入exc的時候會出現列按照字母順序排列，下面是2種解決方法

1、讓本列重新排序

df3 = pd.DataFrame(df3,columns = ['date','open','high','close','low','volume','price_change','p_change','ma5','ma10','ma20','v_ma5','v_ma10','v_ma20','turnover'])  

2、寫入exc的時候排序

c=['date','open','high','close','low','volume','price_change','p_change','ma5','ma10','ma20','v_ma5','v_ma10','v_ma20','turnover']

df3.to_excel(writer,'Sheet1',columns=c)