os_name = platform.system()
    id = request.get_json()['id']
    #id = request.args.get('id')
    print("id in getBeiJingTu ,="+str(id))
    sql1 = "SELECT beiJingTuMing FROM user_info where id=%s;"
    cur_new = db.cursor()
    if (os_name.lower() == "Windows".lower()):
        print("in getBeiJingTu on windows")
        params1 = (id)
        #cur = db.cursor()
        print(cur_new.mogrify(sql1, params1))
        #cur.execute(sql1,params1,)
        cur_new.execute(sql1, params1)
        beiJingTuMing_new = cur_new.fetchall()
    elif (os_name.lower() == "Linux".lower()):
        print("in getBeiJingTu on linux")
        params1 = (id,)
        #cur = db.cursor()
        print(cur_new.mogrify(sql1, params1))
        cur_new.execute(sql1,params1,)
        beiJingTuMing_new = cur_new.fetchall()
    else:
        print("操作系统不匹配，哪里有问题？in getBeiJingTu")
    # 获取查询结果
    #beiJingTuMing_new = cur.fetchall()
    if(beiJingTuMing_new and len(beiJingTuMing_new[0]) > 0):
        beiJingTuMing_new_1 = beiJingTuMing_new[0][0]
        print("beiJingTuMing_new_1=",beiJingTuMing_new_1)
        cur_new.close()
        return beiJingTuMing_new_1
    else:
        print("beiJingTuMing_new=",beiJingTuMing_new)
        cur_new.close()
        return str(-109)

有id，比如输出：
id in getBeiJingTu ,=50
in getBeiJingTu on linux
SELECT beiJingTuMing FROM user_info where id=50;
beiJingTuMing_new= ()
但是用sql语言执行：SELECT beiJingTuMing FROM user_info where id=50;
结果是一个字符串。有时候，又能拿到字符串。奇怪。
总是报：pymysql.err.InterfaceError: (0, '')，百度也无果。谁知道是怎么回事吗？谢谢
--
修改:feng321 FROM 39.146.76.*
FROM 39.146.76.*