ERROR: Could not find a version that satisfies the requirement virtualenv (from versions: none）
在Windows下安装virtualenv 时，碰到了如下问题 这是由于网络不稳定，因此在安装模块时，指定国内镜像 其后指定的 --trusted-host pypi.do ...
原文：Python出现Could not find a version that satisfies the requirement openpyxl (from versions: )
一.环境使用python . 时，用pip安装openpyxl出现如下错误： 系统环境：windows 家庭版Python版本：python . . IDE：sublime text 二. 解决方案按照提示所示是其中一个原因是pip版本过低，需要更新pip：python m pip install upgrade pip由于python国内网络不稳定，一直报错，升级了很多次才成功。然后继续还是报错 ...
2019-04-21 12:38 3 37708 推荐指数：
相关推荐
【AI模型测试】python安装opencv出现如下错误：Could not find a version that satisfies the requirement cv2 (from versions: )
在python中安装cv2库是提示不能找到满足需要的版本，我的环境配置是：pycharm+anacond ...
安装jupyterlab出现 ERROR: Could not find a version that satisfies the requirement jupyter-lab (from versions: none)
问题：安装jupyterlab出现 以上说明，install和安装库的源头没关系，那怎么解决？ 这里引入了另外一个镜像网站： http://pypi.doubanio.com/simple/ 对应安装的命令为： pip install 安装包名字 -i http ...
python Could not find a version that satisfies the requirement pymysql (from versions: none) ERROR: No matching distribution found for pymysql
使用pip安装pymysql出错;Could not find a version that satisfies the requirement cryptography (from pymysql) (from versions: ) No matching distribution found ...
pip安装python包出错：Could not find a version that satisfies the requirement skimage (from versions: )
今天用pip安装skimage时报错： 这是因为网络的问题，需要使用国内的镜像源来加速,比如豆瓣源 命令改为： pip install scikit-image -i http://pypi ...
在公司用pip安装openpyxl库时，报错：Could not find a version that satisfies the requirement jdcal (from openpyxl) (from versions: ) No matching distribution found
在公司用pip安装openpyxl库时，执行pip install openpyxl 后，报错：Could not find a version that satisfies the requirement jdcal (from openpyxl) (from versions ...
Could not find a version that satisfies the requirement Werkzeug>=0.15 (from flask) (from versions: none)的解决
在dos命令窗口输入pip install flask 遇到错误 错误： ERROR: Could not find a version that satisfies the requirement Werkzeug>=0.15 (from flask) (from versions ...