I am trying to install pyfftw in a Conda environment from the condo-forge channel. I get the following output:
conda install -c conda-forge pyfftw
Output:
Channels:
- conda-forge
- defaults
Platform: linux-64
Collecting package metadata (repodata.json): done
Solving environment: \ warning libmamba Added empty dependency for problem type SOLVER_RULE_UPDATE
failed
LibMambaUnsatisfiableError: Encountered problems while solving:
- package _openmp_mutex-5.1-1_gnu requires _libgcc_mutex 0.1 main, but none of the providers can be installed
Could not solve for environment specs
The following packages are incompatible
├─ _openmp_mutex 5.1.* is installable and it requires
│ └─ _libgcc_mutex 0.1 main, which can be installed;
├─ pin-1 is installable and it requires
│ └─ python 3.11.* , which can be installed;
└─ pyfftw is not installable because there are no viable options
├─ pyfftw [0.10.1|0.10.3|...|0.12.0] would require
│ └─ python [2.7* |>=2.7,<2.8.0a0 ], which conflicts with any installable versions previously reported;
├─ pyfftw [0.10.1|0.10.3|0.10.4] would require
│ └─ python 3.4* , which conflicts with any installable versions previously reported;
├─ pyfftw [0.10.1|0.10.3|0.10.4] would require
│ └─ python [3.5* |>=3.5,<3.6.0a0 ], which conflicts with any installable versions previously reported;
├─ pyfftw 0.10.4 would require
│ └─ python 3.6* , which conflicts with any installable versions previously reported;
├─ pyfftw [0.10.4|0.11.0|0.11.1|0.12.0] would require
│ └─ python >=3.6,<3.7.0a0 , which conflicts with any installable versions previously reported;
├─ pyfftw [0.10.4|0.11.0|0.11.1|0.12.0|0.13.0] would require
│ └─ python >=3.7,<3.8.0a0 , which conflicts with any installable versions previously reported;
├─ pyfftw [0.11.1|0.12.0|0.13.0|0.13.1] would require
│ └─ python >=3.8,<3.9.0a0 , which conflicts with any installable versions previously reported;
├─ pyfftw [0.12.0|0.13.0|0.13.1] would require
│ └─ python >=3.10,<3.11.0a0 , which conflicts with any installable versions previously reported;
├─ pyfftw [0.12.0|0.13.0|0.13.1] would require
│ └─ python >=3.9,<3.10.0a0 , which conflicts with any installable versions previously reported;
└─ pyfftw [0.13.0|0.13.1] would require
└─ libgcc-ng >=12 , which requires
└─ _libgcc_mutex 0.1 conda_forge, which conflicts with any installable versions previously reported.
Pins seem to be involved in the conflict. Currently pinned specs:
- python 3.11.* (labeled as 'pin-1')
I do not understand the error. Does it mean we need three different Python versions?
What could be a solution to this?
I tried installing conda-libmamba-solver, but without success. The OS is Ubuntu 20.04 LTS.
Conda Forge has known issues with mixing packages with defaults channel (i.e., Anaconda). Try installing a fresh environment where everything comes from Conda Forge.
conda create -n foo -c conda-forge python=3.11 pyfftw
This solves for me without any issues.