After updating to conda 24.9.1, mamba doesn't work with ImportError

[yangr9]

Troubleshooting docs

• My problem is not solved in the Troubleshooting docs

Anaconda default channels

• I do NOT use the Anaconda default channels (pkgs/* etc.)

How did you install Mamba?

Mambaforge or latest Miniforge

Search tried in issue tracker

No relevant issues

Latest version of Mamba

• My problem is not solved with the latest version

Tried in Conda?

I do not have this problem with Conda, just with Mamba

Describe your issue

After updating to conda 24.9.1, mamba doesn't work with ImportError. The specific errors are as follows:

~ mamba update --all
Traceback (most recent call last):
File "/Users/.../miniforge3/bin/mamba", line 7, in
from mamba.mamba import main
File "/Users/.../miniforge3/lib/python3.10/site-packages/mamba/mamba.py", line 18, in
from conda.cli.main import generate_parser, init_loggers
ImportError: cannot import name 'generate_parser' from 'conda.cli.main' (/Users/.../miniforge3/lib/python3.10/site-packages/conda/cli/main.py)

I tried to check Conda Release notes, it seems there are deprecations that may cause the above errors:
Remove conda.cli.main.generate_parser. Use conda.cli.conda_argparse.generate_parser instead. (#14077)
Remove conda.cli.main.init_loggers(context) (#14077)

So how to fix this? Thx

mamba info / micromamba info

~ mamba info
Traceback (most recent call last):
  File "/Users/.../miniforge3/bin/mamba", line 7, in <module>
    from mamba.mamba import main
  File "/Users/.../miniforge3/lib/python3.10/site-packages/mamba/mamba.py", line 18, in <module>
    from conda.cli.main import generate_parser, init_loggers
ImportError: cannot import name 'generate_parser' from 'conda.cli.main' (/Users/.../miniforge3/lib/python3.10/site-packages/conda/cli/main.py)

Logs

No response

environment.yml

No response

~/.condarc

No response

[Hind-M]

Which version of mamba are you using? If it's <= 1.5.8, it needs to be updated to >= 1.5.9 in order to work with this version of conda.

[yangr9]

My latest mamba version is 2.0.1

[Hind-M]

mamba 2.x does not rely on conda anymore. So I think that the problem is that it's mixing some older 1.x mamba version and the new one 2.0.1.
I suggest to completely remove all existing versions of mamba/conda and install a fresh mamba 2.0.1.

[Hind-M]

@yangr9 Did you manage to make it work?

[swierh]

mamba 2.x does not rely on conda anymore. So I think that the problem is that it's mixing some older 1.x mamba version and the new one 2.0.1. I suggest to completely remove all existing versions of mamba/conda and install a fresh mamba 2.0.1.

For me this fixes the problem.

But note that the miniforge distribution (as recommended in the docs) is still on mamba version 1.5.9 (which is compatible with conda 24.9.1). So if you want the shiny new mamba 2.0.1, you'll have to wait for miniforge to update or get it elsewhere.

[yangr9]

Thanks for your suggestions.

I used "~ conda search mamba" to check the version of mamba, which shows the latest version of my mamba is 2.0.1. I hope this is a correct way to check the mamba version...

[jjerphan]

To complete Hind's comment (i.e. #3520 (comment)), the update is blocked by #3503. See #3503 (comment) for a temporary solution to update to mamba 2.0.