日期大小比较令解决{strftime('%Y年%m月%d日')}出错问题

大小比较代码：

import datetime
import time
#将日期字符串转为时间再比较，time，datetime,str
def valid_date(timestr):
    #获取当前时间日期
    nowTime_str = datetime.datetime.now().strftime('%Y-%m-%d') 
    print(nowTime_str)
    #mktime参数为struc_time,将日期转化为秒，
    e_time = time.mktime(time.strptime(nowTime_str,"%Y-%m-%d"))
    print(e_time)
    try:
        s_time = time.mktime(time.strptime(timestr, '%Y-%m-%d'))
        print(s_time)
        #日期转化为int比较
        diff = int(s_time)-int(e_time)
        print(diff)
        if diff >= 0:
            return 1
        else:
            print('所查日期不能小于当前时间！！！')
            return 0
    except Exception as e:
        print(e)
        return 0
if __name__=='__main__':
    valid_date("2018-10-07")

解决报错方案：

Traceback (most recent call last):
  File "E:/pycharm/WorkPlace/Graduation_project/Util/有用插件/日期比较.py", line 32, in <module>
    nowTime_str = datetime.datetime.now().strftime('%Y年%m月%d日')
UnicodeEncodeError: 'locale' codec can't encode character 'u5e74' in position 2: encoding error

更改为：

time.strftime('%Y{y}%m{m}%d{d} %H{h}%M{f}%S{s}').format(y='年',m='月',d='日',h='时',f='分',s='秒')