报错：raise ReadTimeoutError(self._pool, None, “Read timed out.”) pip._vendor.urllib3.exceptions.ReadTimeoutError: HTTPSConnectionPool(host=‘files.pythonhosted.org’, port=443): Read timed out.
可采用清华镜像得方式安装：
pip install jieba -i https://pypi.tuna.tsinghua.edu.cn/simple