最近要用python2.7的，安裝虛擬環境時發生了下邊的錯誤：
CondaHTTPError: HTTP 404 NOT FOUND for url <https://pypi.doubanio.com/simple/noarch/repodata.json> Elapsed: 00:00.124769 The remote server could not find the noarch directory for the requested channel with url: https://pypi.doubanio.com/simple As of conda 4.3, a valid channel must contain a `noarch/repodata.json` and associated `noarch/repodata.json.bz2` file, even if `noarch/repodata.json` is empty. please request that the channel administrator create `noarch/repodata.json` and associated `noarch/repodata.json.bz2` files. $ mkdir noarch $ echo '{}' > noarch/repodata.json $ bzip2 -k noarch/repodata.json You will need to adjust your conda configuration to proceed. Use `conda config --show channels` to view your configuration's current state. Further configuration help can be found at <https://conda.io/docs/config.html>.
發現鏡像未經授權，也就是說，需要回復到官方源鏡像，恢復鏡像命令：
conda config --remove-key channels
可以切換國內其他源鏡像：
添加源命令：
conda config --add channels
可添加國內鏡像 例：
清華源鏡像：
#添加清華的源 conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/
中科大的源鏡像：
conda config –add channels https://mirrors.ustc.edu.cn/anaconda/pkgs/free/
阿里雲的源鏡像：
conda config --add channels http://mirrors.aliyun.com/pypi/simple/
我添加清華鏡像后下載速度，飛升
參考博客：https://blog.csdn.net/yixieling4397/article/details/100551813