'ascii' codec can't decode byte 0xe4 in position 0: ordinal not in range(128)

python  flask 中出现这个报错'ascii' codec can't decode byte 0xe4 in position 0: ordinal not in range(128)根据提示可知是涉及到了编码问题

将.py文件中开头加入如下代码

#! /usr/bin/env python 

# -*- coding: utf-8 -*- 
import sys
reload(sys) 
sys.setdefaultencoding('utf-8')