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This article is about how conda uses Tsinghua Source. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Preface

When downloading OpenCV, it is found that the conda channel image of Tsinghua University is no longer available, so record here:

1) how to display all channel

2) how to replace the channel.

1 display all channel

First of all, conda config-- show can display the config information of all conda.

If we only want to see the channels information, type conda config-- show channels, as follows:

(base) C:Usersdehen > conda config-show channels

Channels:

-https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge/

-defaults

Now we have two sources, a Tsinghua image and a defauls default download source.

However, this Tsinghua source is no longer available. When I downloaded opencv, I typed: conda install opencv, but reported an error:

(base) C:Usersdehen > conda install opencv

Solving environment: failed

CondaHTTPError: HTTP 000 CONNECTION FAILED for url

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.

ConnectionError (ReadTimeoutError ("HTTPSConnectionPool (host='mirrors.tuna.tsinghua.edu.cn', port=443): Read timed out."))

So I'm going to delete this source.

2 remove Tsinghua image

Input: conda config-- remove channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge/

The purpose of this command is to remove the Tsinghua source previously displayed by conda config-show channels.

(base) C:Usersdehen > conda config-- remove channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge/

(base) C:Usersdehen > conda config-show channels

Channels:

-defaults

(base) C:Usersdehen >

At this time, run conda config-show channels and you will find that Tsinghua Source has been deleted.

3 add available Tsinghua sources

Referring to [4], I found that my previously installed address https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge/ of Tsinghua Source is a mirror of conda-forge, one of the tripartite sources of conda maintained by Tsinghua University. In addition, Tsinghua has many available sources.

So I added it according to the instructions on the official website:

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-set show_channel_urls yes

Conda config-- set show_channel_urls yes means that the url of channel is displayed when installing the package from channel, so that you can know the source of the package installation.

4 download opencv

After adding this source (channel), I rerun conda install opencv and was able to download it successfully!

But the middle is actually automatic installation, in the pre-installation confirmation [Y _ conda N], skipped directly, the default is Y.

It made me very uncomfortable, so I ran:

Conda config-set always_yes false

(this means that in the installation confirmation, it is not the default yes, but it is up to me to decide.)

5 some other conda instructions

Conda install installs the specified package

Conda remove removes the specified package

Conda update updates the specified package

Thank you for reading! This is the end of the article on "how conda uses Tsinghua Source". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, you can share it for more people to see!

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