安装pytest时报错，多次重新安装均无法解决

1、使用命令安装pytest：pip3 install pytest -i Simple Index http://pypi.douban.com/simple/ --trusted-host pypi.douban.com
报错信息如下：
ERROR: Could not find a version that satisfies the requirement colorama; sys_platform == "win32" (from pytest) (from versions: none)
ERROR: No matching distribution found for colorama; sys_platform == "win32" (from pytest)

2、使用命令安装pytest：python -m pip install pytest -i Simple Index http://pypi.douban.com/simple/ --trusted-host pypi.douban.com
报错信息如下：
ERROR: Could not find a version that satisfies the requirement atomicwrites>=1.0; sys_platform == "win32" (from pytest) (from versions: none)
ERROR: No matching distribution found for atomicwrites>=1.0; sys_platform == "win32" (from pytest)

缺少其他库支持，你需要先安装或升级atomicwrites，在cmd中 pip install atomicwrites（我安装的版本是1.4.1），然后再安装第二种安装方式安装pytest

这篇文章末尾说是因为私有库中缺少colorama，同步并创建索引即可，希望对你有帮助 搭建本地私有pip源_xianjie0318的博客-CSDN博客_搭建本地pip源 目的1、用于内网内的pip安装2、整理个人使用的python第三方库3、个人开发公用库搭建环境1、centos72、python2/python3搭建步骤（python2相同）1、安装python3.7下载地址：https://www.python.org/ftp/python/3.7.9/Python-3.7.9.tar.xz解压tar -xvJf Python-3.7.2.tar.xz创建编译安装目录mkdir /usr/local/python3 https://blog.csdn.net/xianjie0318/article/details/110177369