nothing provides requested tasks 2.8.0 when install python tasks requirement

Question

Now I want to add tasks requirement into my python project, first step i add the tasks dependencies into the requirement.txt:

tasks=2.8.0

then I try to run this command to install the requirement:

mamba install --file requirements.txt

the log shows like this:

~/source/pydolphin on  feature/celery! ⌚ 11:40:06
$ mamba install --file requirements.txt                                                                                               ‹ruby-2.7.2›

                  __    __    __    __
                 /  \  /  \  /  \  /  \
                /    \/    \/    \/    \
███████████████/  /██/  /██/  /██/  /████████████████████████
              /  / \   / \   / \   / \  \____
             /  /   \_/   \_/   \_/   \    o \__,
            / _/                       \_____/  `
            |/
        ███╗   ███╗ █████╗ ███╗   ███╗██████╗  █████╗
        ████╗ ████║██╔══██╗████╗ ████║██╔══██╗██╔══██╗
        ██╔████╔██║███████║██╔████╔██║██████╔╝███████║
        ██║╚██╔╝██║██╔══██║██║╚██╔╝██║██╔══██╗██╔══██║
        ██║ ╚═╝ ██║██║  ██║██║ ╚═╝ ██║██████╔╝██║  ██║
        ╚═╝     ╚═╝╚═╝  ╚═╝╚═╝     ╚═╝╚═════╝ ╚═╝  ╚═╝

        mamba (0.15.1) supported by @QuantStack

        GitHub:  https://github.com/mamba-org/mamba
        Twitter: https://twitter.com/QuantStack

█████████████████████████████████████████████████████████████


Looking for: ['feedparser==6.0.2', 'requests==2.25.1', 'bs4==4.9.3', 'beautifulsoup4==4.9.3', 'psycopg2==2.8.6', 'numpy==1.20.2', 'maya==0.6.1', 'sqlalchemy==1.4.6', 'redis==5.0.3', 'croniter==0.3.36', 'apscheduler==3.7.0', 'opencv==4.5.2', 'mamba==0.15.1', 'celery==5.1.2', 'tasks==2.8.0']

conda-forge/osx-64       Using cache
conda-forge/noarch       Using cache
pkgs/main/noarch         [====================] (00m:00s) No change
pkgs/r/osx-64            [====================] (00m:00s) No change
pkgs/main/osx-64         [====================] (00m:00s) No change
pkgs/r/noarch            [====================] (00m:02s) Done

Pinned packages:
  - python 3.9.5


Encountered problems while solving:
  - nothing provides requested tasks 2.8.0

(pydolphin)

the log shows error message: nothing provides requested tasks 2.8.0. why would this happen and what should I do to fix the problem and install tasks success? BTW, this is my full dependencies of my project:

feedparser=6.0.2
requests=2.25.1
bs4=4.9.3
beautifulsoup4=4.9.3
psycopg2=2.8.6
numpy=1.20.2
maya=0.6.1
sqlalchemy=1.4.6
redis=5.0.3
croniter=0.3.36
apscheduler=3.7.0
opencv=4.5.2
mamba=0.15.1
celery=5.1.2
tasks=2.8.0

I have searched from internet but seems no one encount this problem.

user_9327628 · Answer

The Mamba is conda-like package manager and needs compatible packages. The tasks is a pip package and ATM nobody has created recipe for conda/mamba for the tasks package. Because there is no recipe for that package, you are told that the package is not provided in channels you searched in (those were "conda-forge", "pkgs/main"...).

Solution:

Correct (recomended): Write a conda recipe for tasks and either use it locally, or create your channel on anaconda cloud or upload in to some public channel (This may take a while, as there is usually review process involved).

Punk (not recomended): Install your requirements except the tasks and then use pip to install the tasks. Note, that the changes made by pip to the env are not tracked by the mamba package manager. More info on the topic https://www.anaconda.com/blog/using-pip-in-a-conda-environment.

Notes: Search in public conda packages on anaconda cloud like this: https://anaconda.org/search?q=tasks

nothing provides requested tasks 2.8.0 when install python tasks requirement

1 Answers