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I am trying to create a conda environment using the following environment.yml file:

conda env create -n med -f environment.yml
File contents:
name: med
channels: 
  - defaults
  - conda-forge
dependencies: 
  - python=3.8
  - batchgenerators==0.23
  - pandas==1.1.5
  - SimpleITK==2.2.1
  - tensorboard==2.11.0
  - tqdm
  - pip
  - pip: 
    - --extra-index-url https://download.pytorch.org/whl/cu117
    - torch==1.13.1+cu117
    - torchvision==0.14.1+cu117
The setup fails with:
ResolvePackageNotFound:
- batchgenerators
If I delete batchgenerators from the yml file, create the environment, conda activate it and try pip install batchgenerators - it is successful.
Further, using pip also works
conda create -n med 
conda activate med
pip install -r requirements.txt
batchgenerators==0.23
pandas==1.1.5
SimpleITK==2.2.1
tensorboard==2.11.0
torch==1.13.1+cu117
torchvision==0.14.1+cu117
Any suggestions to make conda work directly?
Thanks,
Bogdan
                Seems like there is no package "batchgenerators" in the default and conda-forge channels. You can ensure it at anaconda.org and conda-forge.org. It is a common case that there are packages in pypi and not in conda.
– griko
                Dec 20, 2022 at 21:14
                Try to put the "batchgenerators" in the "- pip:" section (where the installation of a specific torch version is declared)
– griko
                Dec 20, 2022 at 21:16
Thanks to @griko! Adding batchgenerators to the yml file fixed the issue because the package is available on pypi but not in conda defaults or conda forge.
- pip: 
  - --extra-index-url https://download.pytorch.org/whl/cu117
  - torch==1.13.1+cu117
  - torchvision==0.14.1+cu117
  - batchgenerators==0.23
        
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