Installing the SCIP Python Wrapper "pyscipopt" Does Not Work about pyscipopt-feedstock

[jurgen-lentz]

Hey LPLukasLP,

I also use MacOS but I don't have any problems installing PySCIPOpt using conda.
In the following, I will describe the commands I use to install PySCIPOpt using conda on MacOS:

1. conda create --name pyscipopt-env to create a new, seperate environment. Here, I name the environment pyscipopt-env but you can choose a different name. After running the command, you may need to type y when asked to Proceed ([y]/n)?
2. conda activate pyscipopt-env to activate the newly created environment.
3. conda install --channel conda-forge pyscipopt to install PySCIPOpt. After running the command, you may also here need to type y when asked to Proceed ([y]/n)?. Here, I receive the following output:

Solving environment: done

## Package Plan ##

  environment location: <PATH_TO_ENV>

  added / updated specs:
    - pyscipopt


The following NEW packages will be INSTALLED:

  ampl-mp            conda-forge/osx-64::ampl-mp-3.1.0-h2beb688_1006
  bzip2              conda-forge/osx-64::bzip2-1.0.8-h0d85af4_4
  ca-certificates    conda-forge/osx-64::ca-certificates-2021.10.8-h033912b_0
  cppad              conda-forge/osx-64::cppad-20220000.1-he49afe7_0
  gmp                conda-forge/osx-64::gmp-6.2.1-h2e338ed_0
  ipopt              conda-forge/osx-64::ipopt-3.14.4-hc501a57_0
  libblas            conda-forge/osx-64::libblas-3.9.0-13_osx64_openblas
  libcxx             conda-forge/osx-64::libcxx-12.0.1-habf9029_1
  libedit            conda-forge/osx-64::libedit-3.1.20191231-h0678c8f_2
  libffi             conda-forge/osx-64::libffi-3.4.2-h0d85af4_5
  libgfortran        conda-forge/osx-64::libgfortran-5.0.0-9_3_0_h6c81a4c_23
  libgfortran5       conda-forge/osx-64::libgfortran5-9.3.0-h6c81a4c_23
  libiconv           conda-forge/osx-64::libiconv-1.16-haf1e3a3_0
  liblapack          conda-forge/osx-64::liblapack-3.9.0-13_osx64_openblas
  libopenblas        conda-forge/osx-64::libopenblas-0.3.18-openmp_h3351f45_0
  libzlib            conda-forge/osx-64::libzlib-1.2.11-h9173be1_1013
  llvm-openmp        conda-forge/osx-64::llvm-openmp-13.0.1-hda6cdc1_0
  metis              conda-forge/osx-64::metis-5.1.0-h2e338ed_1006
  mumps-include      conda-forge/osx-64::mumps-include-5.2.1-h694c41f_10
  mumps-seq          conda-forge/osx-64::mumps-seq-5.2.1-h805a9e9_10
  ncurses            conda-forge/osx-64::ncurses-6.3-he49afe7_0
  openssl            conda-forge/osx-64::openssl-3.0.0-h0d85af4_2
  pip                conda-forge/noarch::pip-22.0.3-pyhd8ed1ab_0
  pyscipopt          conda-forge/osx-64::pyscipopt-4.0.0-py310hba3363e_0
  python             conda-forge/osx-64::python-3.10.2-hea1dfa3_3_cpython
  python_abi         conda-forge/osx-64::python_abi-3.10-2_cp310
  readline           conda-forge/osx-64::readline-8.1-h05e3726_0
  scip               conda-forge/osx-64::scip-8.0.0-h2adb400_0
  scotch             conda-forge/osx-64::scotch-6.0.9-h9f43b6f_1
  setuptools         conda-forge/osx-64::setuptools-60.9.3-py310h2ec42d9_0
  sqlite             conda-forge/osx-64::sqlite-3.37.0-h23a322b_0
  tbb                conda-forge/osx-64::tbb-2021.5.0-h940c156_0
  tk                 conda-forge/osx-64::tk-8.6.12-h5dbffcc_0
  tzdata             conda-forge/noarch::tzdata-2021e-he74cb21_0
  unixodbc           conda-forge/osx-64::unixodbc-2.3.9-hd863c23_0
  wheel              conda-forge/noarch::wheel-0.37.1-pyhd8ed1ab_0
  xz                 conda-forge/osx-64::xz-5.2.5-haf1e3a3_1
  zlib               conda-forge/osx-64::zlib-1.2.11-h9173be1_1013


Proceed ([y]/n)? y

Preparing transaction: done
Verifying transaction: done
Executing transaction: done

If this doesn't work, you should consider installing PySCIPOpt with pip. But you then need to install the SCIP Optimization Suite and set the SCIPOPTDIR environment variable before (for more details see INSTALL.md).

Best wishes
Jurgen

[LPLukasLP]

Hey Jurgen,

thank you, the approach to set a new environment in anaconda actually worked!

I did it sligtly different: Instead of installing it by entering commands into the Mac Terminal or the Anaconda prompt, I set up a new environment in the Anaconda Navigator. There, I installed a different version of Python (not 3.9, but 3.8). Then, I was able to install the PySCIPOpt package in the new environment. I did that via Anaconda Navigator as well.

As far as I can relate, this was the same approach of how to get PySCIPOpt running in conda, just with a different way how to hand in the commands to the system.

As it works now, I will close the issue in GitHub