# coding=utf-8
import HTMLTestRunner
import os
import unittest
import time

# 设置报告文件保存路径
report_path = os.path.dirname(os.path.abspath(".")) + '/test_reports/'

# 获取系统当前时间
now = time.strftime("%Y-%m-%d-%H_%M_%S", time.localtime(time.time()))

# 设置报告名称格式
html_file = report_path + now + "HTMLTemplate.html"
fp = open(html_file, "wb")

# 构建suite
# suite = unittest.TestSuite()
# suite.addTest(TestBaiduSearch('test_baidu_search'))
# suite.addTest(TestGetPageTitle('test_get_page_title'))

# # 通过makeSuite把整个class的测试case都加入套件中
# suite = unittest.TestSuite(unittest.makeSuite(TestBaiduSearch))

# 通过discover把整个package的所有测试case都加入套件中
suite = unittest.TestLoader().discover("testsuites")

if __name__ == '__main__':

    # # 执行测试用例
    # runner = unittest.TextTestRunner()

    # 初始化一个HTMLTestRunner实例对象，用来生成报告
    runner = HTMLTestRunner.HTMLTestRunner(stream=fp, title=u"某某项目测试报告", description=u"用例测试情况")
    # 开始执行套件
    runner.run(suite)

问题：当我运行这段程序的时候，提示报错：

<_io.TextIOWrapper name='<stderr>' mode='w' encoding='UTF-8'> 
Time Elapsed: 0:00:00.000047