flask下数据excel的导出

将查询数据导出为excel的方法有很多，我这里用了其中的一种方法，其中用到了pandas的库，其实这个库比较笨重，单纯作为excel导出的话，不做推荐。

output = BytesIO()
writer = pd.ExcelWriter(output, engine='xlsxwriter')
workbook = writer.book
worksheet = workbook.add_worksheet('sheet1')
worksheet.write('A1', u'列名')
worksheet.write('B1', )
worksheet.write('C1', )
worksheet.write('D1', )
worksheet.write('E1', )
worksheet.write('F1', )
worksheet.write('G1', )
worksheet.write('H1', )
worksheet.write('I1', )
worksheet.write('J1', )
worksheet.write('K1', )
worksheet.write('L1', )
row = 1
col = 0

data = []

将数据库查询的结果放到data中

for A,B,C,D,E,F,G,H,I,J,K,L in (data):
    K = str(K)
    L = str(L)
    worksheet.write(row, col, A)
    worksheet.write(row, col + 1, B)
    worksheet.write(row, col + 2, C)
    worksheet.write(row, col + 3, float(D)/1000)
    worksheet.write(row, col + 4, E)
    worksheet.write(row, col + 5, F)
    worksheet.write(row, col + 6, G)
    worksheet.write(row, col + 7, H)
    worksheet.write(row, col + 8, I)
    worksheet.write(row, col + 9, float(J)/1000)
    worksheet.write(row, col + 10, K)
    worksheet.write(row, col + 11, L)
    row +=1
worksheet.set_column('A:L', 20)
workbook.close()
output.seek(0)
return send_file(output, attachment_filename=".xlsx",
             as_attachment=True)