day7_读取数据库，写入到excel里面

import pymysql,xlwt
def con_mysql(sql):
    conn = pymysql.connect(host = ‘211.149.218.16‘,user = ‘jxz‘,password = ‘123456‘,db = ‘jxz‘,charset = ‘utf8‘)
    cur = conn.cursor()
    cur.execute(sql)
    res = cur.fetchall()
    cur.close()
    conn.close()
    return res

def write_excel(filename,content):
    book = xlwt.Workbook() # 创建一个excel
    sheet = book.add_sheet(‘学生信息‘) # 添加一个sheet页，sheet可以改成别的名字
    title = [‘id‘,‘name‘]
    i = 0
    for t in title:
        sheet.write(0,i,t)
        i = i + 1
    line_no = 1
    for line in content:
        row = 0
        for j in line:
            sheet.write(line_no,row,j)
            row = row + 1
        line_no = line_no + 1
    book.save(filename)
res = con_mysql(‘select * from stu;‘)#查询结果返回到res里
write_excel(‘haha.xls‘,res)#把内容写到文件里