安装numpy:conda install nampy==1.16 时报错An HTTP error occurred when trying to retrieve this URL.

安装numpy:conda install nampy==1.16 时报错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.

1、错误截图

2、方法一

原因是conda源加入了不知名的URL，现在不能使用了（或者废弃）

# 重置源配置
conda config --remove-key channels
# 重新添加清华源
conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/
conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/
conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/pytorch/
conda config --set show_channel_urls yes
# 查看效果
cat ~/.condarc

(TF117) PS C:\Users\Dell> cat ~/.condarc                                                                                ssl_verify: true
show_channel_urls: true
report_errors: true
channels:
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/pytorch/
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/
  - defaults

失败！！

3、方法二

# 更新conda
conda update -n base conda

CondaError: Downloaded bytes did not match Content-Length
  url: https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/win-64/llvmlite-0.35.0-py37h34b8924_4.conda
  target_path: D:\Anaconda3\pkgs\llvmlite-0.35.0-py37h34b8924_4.conda
  Content-Length: 12989490
  downloaded bytes: 5160624

CondaHTTPError: HTTP 000 CONNECTION FAILED for url <https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/win-64/imagecodecs-2021.1.11-py37h5da4933_1.conda>
Elapsed: -

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.

CondaHTTPError: HTTP 000 CONNECTION FAILED for url <https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/win-64/matplotlib-base-3.3.4-py37h49ac443_0.conda>
Elapsed: -

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.

CondaHTTPError: HTTP 000 CONNECTION FAILED for url <https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/win-64/pandas-1.2.3-py37hf11a4ad_0.conda>
Elapsed: -

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.

conda update -all

更新也出错！！

Collecting package metadata (current_repodata.json): done
Solving environment: done

# All requested packages already installed.
已经安装完毕了

从报错的情况看可能下载的太慢，之前清华源换了还是有问题。

在这里还原到默认状态。

 conda config --remove-key channels

又按照报错信息手动删除了一些文件

警告conda.gateways.disk.delete：unlink_or_rename_to_trash（140）：无法删除或重命名D：\ Anaconda3 \ pkgs \ qt-5.6.2-vc14_6.tar.bz2。 请手动删除此文件（您可能需要重新启动才能释放文件句柄）

警告conda.gateways.disk.delete：unlink_or_rename_to_trash（140）：无法删除或重命名D：\ Anaconda3 \ pkgs \ qt-5.6.2-vc14_6 \ Library \ plugins \ sqldrivers \ qsqlite.dll。 请手动删除此文件（您可能需要重新启动才能释放文件句柄）

再升级一下

# conda
conda update conda
# anaconda(升级anaconda前需要先升级conda)
conda update anaconda
# anaconda-navigator
conda update anaconda-navigator
# spyder
conda update spyder
# 所有包
conda update --all
# 尽量避免使用conda update --all命令，可能会出现部分包降级的问题

安装第一个命令过程后，我出现了一个错误：PackageNotInstalledError: Package is not installed in prefix，这个时候不用慌，输入conda的命令基本上都是报错，把终端关掉重新开启就解决了。原文链接：https://blog.csdn.net/sv2008337/article/details/80235482

试一下。

上面的都行了，OK！

# 修改频道
conda config --add channels conda-forge
conda config --set channel_priority flexible

你以为这样就解决了么？

不！！这行故障还是存在。

先到这里，这就是我一下午找遍全网也没解决问题的脑残操作，希望观众老爷看了之后能够解决你的问题。