错误描述
An HTTP error occurred when trying to retrieve this URL.
HTTP errors are often intermittent, and a simple retry will get you on your way.
是在创建conda新环境的时候出现的: conda create -n myEnvironmentName python=3.7
PS:如果是安装依赖包不使用pip install, conda安装博不太友好..
问题解决：
(这个方法对我有效，不知道对你有没有效)
1. 终端打开conda配置文件gedit .condarc
2.删除原文件内容并替换为下面的:
1 channels:
2 - defaults
3 show_channel_urls: true
4 default_channels:
5 - http://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main
6 - http://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free
7 - http://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/r
8 custom_channels:
9 conda-forge: http://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud
10 msys2: http://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud
11 bioconda: http://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud
12 menpo: http://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud
13 pytorch: http://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud
14 simpleitk: http://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud
3. 问题解决！
原连接：https://blog.csdn.net/zqm_0015/article/details/114581341?spm=1001.2101.3001.6650.1&utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7Edefault-1.essearch_pc_relevant&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7Edefault-1.essearch_pc_relevant