conda @config command @package cache package cache shared @Channels @conda install pyside6@channel_alias

Article directory

- refs
- check basic information
- - config add pkgs_dirs
  - View the condarc source file
  - query by field
  - all information
- conda Channel
- - conda-forge channel install package@conda install cupy
  - Error caused by inappropriate url Channel
- Channel specifies to use the complete url link conda install@conda to temporarily change the source
- - conda install install pyside6
  - Domestic Channel installation
  - conda default source installation
- default_channels
- Channel alias@Set a channel alias (channel_alias)
- - Check the default channel_alias value
  - examples:
  - Set channel_alias to own repository

refs

Configuring a shared package cache – Anaconda documentation
conda config – conda 23.3.0.post2+8419c02f5 documentation

Check basic information

(d:\condaPythonEnvs\d2l) PS D:\repos\blogs> conda info

     active environment: d2l
    active env location : d:\condaPythonEnvs\d2l
            shell level: 1
       user config file: C:\Users\cxxu\.condarc
 populated config files: C:\Users\cxxu\.condarc
          conda version: 23.1.0
    conda-build version : not installed
         python version: 3.9.5.final.0
       virtual packages: __archspec=1=x86_64
                          __cuda=12.0=0
                          __win=0=0
       base environment: C:\Users\cxxu\miniconda3 (writable)
      conda av data dir : C:\Users\cxxu\miniconda3\etc\conda
  conda av metadata url : None
           channel URLs: https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/win-64
                          https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/noarch
                          https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/r/win-64
                          https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/r/noarch
                          https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/msys2/win-64
                          https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/msys2/noarch
          package cache: C:\Users\cxxu\miniconda3\pkgs
                          C:\Users\cxxu\.conda\pkgs
                          C:\Users\cxxu\AppData\Local\conda\conda\pkgs
       envs directories : d:\condaPythonEnvs
                          C:\Users\cxxu\miniconda3\envs
                          C:\Users\cxxu\.conda\envs
                          C:\Users\cxxu\AppData\Local\conda\conda\envs
               platform : win-64
             user-agent : conda/23.1.0 requests/2.28.1 CPython/3.9.5 Windows/10 Windows/10.0.22621
          administrator : False
             netrc file : None
           offline mode : False

By default, package chace contains 3 directories:

package cache: C:\Users\cxxu\miniconda3\pkgs
                  C:\Users\cxxu\.conda\pkgs
                  C:\Users\cxxu\AppData\Local\conda\conda\pkgs

config add pkgs_dirs

Use config --add pkgs_dirs to add directories to pkgs_dirs
- If you only add one or two, you can use the command line to add:
- ```
(d:\condaPythonEnvs\d2l) PS D:\conda3\pkgs> conda config --add pkgs_dirs d:\conda3\pkgs
Warning: 'd:\conda3\pkgs' already in 'pkgs_dirs' list, moving to the top
```
- If the added item has been added before, the order of the item will be adjusted (moving to the top)
If you need to add multiple directories, you can open (create without) the condarc file and edit it directly
After editing, check the following:

(d:\condaPythonEnvs\d2l) PS D:\conda3\pkgs> conda info

     active environment: d2l
    active env location : d:\condaPythonEnvs\d2l
            shell level: 1
       user config file: C:\Users\cxxu\.condarc
...
          package cache: d:\conda3\pkgs
                          C:\Users\cxxu\AppData\Local\conda\conda\pkgs
                          C:\Users\cxxu\.conda\pkgs
                          C:\Users\cxxu\miniconda3\pkgs
       envs directories : d:\condaPythonEnvs
                          C:\Users\cxxu\miniconda3\envs
                          C:\Users\cxxu\.conda\envs
                          C:\Users\cxxu\AppData\Local\conda\conda\envs
               platform : win-64
             user-agent : conda/23.1.0 requests/2.28.1 CPython/3.9.5 Windows/10 Windows/10.0.22621
          administrator : False
             netrc file : None
           offline mode : False

View condarc source file

conda config --show-sources

Query by field

If you want to query the content configured in the condarc file, you can use the command line to query conda config --get

(d:\condaPythonEnvs\pt2.0) PS D:\repos\CCSER\d2l-zh\pytorch> conda config --get pkgs_dirs
--add pkgs_dirs 'C:\Users\cxxu\miniconda3\pkgs'
--add pkgs_dirs 'C:\Users\cxxu\.conda\pkgs'
--add pkgs_dirs 'C:\Users\cxxu\AppData\Local\conda\conda\pkgs'
--add pkgs_dirs 'd:\conda3\pkgs'
(d:\condaPythonEnvs\pt2.0) PS D:\repos\CCSER\d2l-zh\pytorch>

All information

conda config --show can query more abundant information (including the default configuration and not displaying the information set in the condarc file)

Conda Channel

Conda channels – conda 23.3.0.post2+8419c02f5 documentation

conda-forge channel install package@conda install cupy

The configuration provided by Tsinghuayuan, in which conda-forge can directly install some packages, such as cupy

(d:\condaPythonEnvs\pt2.0) PS D:\repos\blogs\python> conda install -c conda-forge cupy
Collecting package metadata (current_repodata.json): done
Solving environment: done

## Package Plan ##

  environment location: d:\condaPythonEnvs\pt2.0

  added / updated specs:
    - cupy


The following packages will be downloaded:

    package |
    --------------------------|-----------------
    cudatoolkit-11.1.1 | heb2d755_10 1.20 GB conda-forge
    cupy-11.6.0 | py310h1011f98_0 49.0 MB conda-forge
    fastrlock-0.8 | py310h8a704f9_2 29 KB conda-forge
    python_abi-3.10 | 2_cp310 4 KB conda-forge
    -------------------------------------------------- ----------
                                           Total: 1.25GB

The following NEW packages will be INSTALLED:

  cudatoolkit conda-forge/win-64::cudatoolkit-11.1.1-heb2d755_10
  cupy conda-forge/win-64::cupy-11.6.0-py310h1011f98_0
  fastrlock conda-forge/win-64::fastrlock-0.8-py310h8a704f9_2
  python_abi conda-forge/win-64::python_abi-3.10-2_cp310

The following packages will be SUPERSEDED by a higher-priority channel:

  ca-certificates anaconda/pkgs/main::ca-certificates-2~ --> conda-forge::ca-certificates-2022.12.7-h5b45459_0
  certifi anaconda/pkgs/main/win-64::certifi-20~ --> conda-forge/noarch::certifi-2022.12.7-pyhd8ed1ab_0


Proceed ([y]/n)? n

Error caused by inappropriate url Channel

So I tried to use -c url to specify the channel. Unexpectedly, Tsinghua source and Ali source both prompted: UnavailableInvalidChannel: HTTP 404 NOT FOUND for channel anaconda/cloud...
It was later discovered that the problem was that the url was incomplete
- ```
conda search -c https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/ pyside6
conda search -c https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge pyside6
```
- The first statement suffix conda-forge is missing, although you can open the page through a browser, but it cannot be used for conda -c parameters

Channel specifies to use the complete url link conda install@conda to temporarily change the source

conda install install pyside6

Suppose your source (channel) replaces the domestic source
- Taking Tsinghuayuan as an example, using conda install pyside6 and conda install -c conda-forge pyside6 will most likely fail to download
Check if pyside6 is available on the current conda-forge Channel
- ```
PS C:\Users\cxxu\Desktop> conda search -c conda-forge pyside6
Loading channels: done
# Name Version Build Channel
pyside6 6.4.0 py310h7a8ee39_0 conda-forge
pyside6 6.4.0 py310h7a8ee39_1 conda-forge
pyside6 6.4.0 py310h7a8ee39_2 conda-forge
pyside6 6.4.0 py310h7a8ee39_3 conda-forge
```
- At this time, I use the Channel configuration of Tsinghua source. Although I found that there are related packages through conda search -c conda-forge pyside6, when I installed it, it stayed at solving environment... this step
I guess there should be some problems with the configuration method provided by domestic sources
- Check the documentation of conda channel_alias and find that conda-forge is an abbreviation, and a prefix url will be inserted when executing
- You can check by conda config --show
- Later, we will summarize and continue to discuss the channel_alias field

Domestic Channel Installation

conda search -c https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge pyside6

Find out if a related package is provided

PS D:\repos\blogs\python> conda search -c https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge pyside6
Loading channels: done
# Name Version Build Channel
pyside6 6.4.0 py310h7a8ee39_0 anaconda/cloud/conda-forge
pyside6 6.4.0 py310h7a8ee39_1 anaconda/cloud/conda-forge
pyside6 6.4.0 py310h7a8ee39_2 anaconda/cloud/conda-forge
pyside6 6.4.0 py310h7a8ee39_3 anaconda/cloud/conda-forge

Install

PS D:\repos\blogs\python> conda activate pyside_conda
(d:\condaPythonEnvs\pyside_conda) PS D:\repos\blogs\python> conda install -c https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge pyside6

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

## Package Plan ##

  environment location: d:\condaPythonEnvs\pyside_conda

  added / updated specs:
    -pyside6


The following packages will be downloaded:

    package |
    --------------------------|-----------------
    bzip2-1.0.8 | h8ffe710_4 149 KB https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge
    cairo-1.16.0 | hd694305_1014 2.3 MB https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge
    double-conversion-3.2.0 | h63175ca_1 72 KB https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge
    expat-2.5.0 | h1537add_0 339 KB https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge
    font-ttf-dejavu-sans-mono-2.37| hab24e00_0 388 KB https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge
...

https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge
    vs2015_runtime-14.34.31931 | h4c5c07a_10 708 KB https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge
    wheel-0.40.0 | pyhd8ed1ab_0 54 KB https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge
    xz-5.2.6 | h8d14728_0 213 KB https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge
    zlib-1.2.13 | hcfcfb64_4 113 KB https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge
    zstd-1.5.2 | h12be248_6 282 KB https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge
    -------------------------------------------------- ----------
                                           Total: 159.7MB

The following NEW packages will be INSTALLED:

  bzip2 anaconda/cloud/conda-forge/win-64::bzip2-1.0.8-h8ffe710_4
  ca-certificates anaconda/cloud/conda-forge/win-64::ca-certificates-2022.12.7-h5b45459_0
  cairo anaconda/cloud/conda-forge/win-64::cairo-1.16.0-hd694305_1014
  ...
  xz anaconda/cloud/conda-forge/win-64::xz-5.2.6-h8d14728_0
  zlib anaconda/cloud/conda-forge/win-64::zlib-1.2.13-hcfcfb64_4
  zstd anaconda/cloud/conda-forge/win-64::zstd-1.5.2-h12be248_6


Proceed ([y]/n)? y


Downloading and Extracting Packages

Preparing transaction: done
Verifying transaction: done
Executing transaction: done
(d:\condaPythonEnvs\pyside_conda) PS D:\repos\blogs\python>

conda default source installation

I try again with conda’s default sources:

https://conda.anaconda.org/conda-forge/
The complete command is conda install -c https://conda.anaconda.org/conda-forge/pyside6

(d:\condaPythonEnvs\pt2.0) PS D:\repos\blogs\python> conda install -c https://conda.anaconda.org/conda-forge/pyside6
Collecting package me-data (current_repodata.json): done
Solving environment: done

## Package Plan ##

  environment location: d:\condaPythonEnvs\pt2.0

  added / updated specs:
    -pyside6


The following packages will be downloaded:

    package |
    --------------------------|-----------------
    cairo-1.16.0 | hd694305_1014 2.3 MB conda-forge
    double-conversion-3.2.0 | h63175ca_1 72 KB conda-forge
    expat-2.5.0 | h1537add_0 339 KB conda-forge
    font-ttf-dejavu-sans-mono-2.37| hab24e00_0 388 KB conda-forge
    font-ttf-inconsolata-3.000 | h77eed37_0 94 KB conda-forge
    font-ttf-source-code-pro-2.038| h77eed37_0 684 KB conda-forge
    font-ttf-ubuntu-0.83 | hab24e00_0 1.9 MB conda-forge
    fontconfig-2.14.2 | hbde0cde_0 186 KB conda-forge
    ...

The official source, predictably, is quite slow

default_channels

Using the .condarc conda configuration file – conda 23.3.0.post2+8419c02f5 documentation

Setting method (command line method)

Take Tsinghuayuan in China as an example:

 conda config --set channel_alias https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/

Check: conda config --show channel_alias

PS C:\Users\cxxu\Desktop> conda config --show channel_alias
channel_alias: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud

Channel alias@Set a channel alias (channel_alias)

Using the .condarc conda configuration file – conda 23.3.0.post2+8419c02f5 documentation
Whenever you use the -c or –channel flags to give conda a channel name that is not a URL, conda will add the channel_alias prefix to the name it is given. The default channel_alias is https://conda.anaconda.org.
If the channel_alias is set to https://my.anaconda.repo:8080/conda/, then users who run the command conda install -c conda-forge some-package will download from https:// my.anaconda.repo:8080/conda/conda-forge Install package some-package.

Check the default channel_alias value

Take powershell as an example: conda config --show |sls channel_alias

PS C:\Users\cxxu\Desktop> conda config --show |sls channel_alias

channel_alias: https://conda.anaconda.org
migrated_channel_aliases: []

If not set, the default value is https://conda.anaconda.org

examples:

For example, the command:

conda install --channel asmeurer is the same as the following command:

conda install --channel https://conda.anaconda.org/asmeurer

Set channel_alias to your own repository

For example: set channel_alias to the repository of https://your.repo/: channel_alias: https://your.repo/
On Windows, you must include a slash (“/”) at the end of the URL:
- For example: https://your.repo/conda/
When channel_alias is set to a repository at https://your.repo.com:
- conda install --channel jsmith is the same as the following command:
- conda install --channel https://your.repo.com/jsmith