Fail to install using Poetry

I’m trying to install this lib using poetry.

My pyproject.yml has two direct dependencies:

numpy = "1.18.4"
lap = "0.4.0"

But since lap also needs numpy, there’s no way to poetry to resolve dependencies without the lap mentioning that numpy is a install dependency.

I’ve found that this custom setup instructions is probably the issue, not compatible with the way poetry tries to install:

https://github.com/gatagat/lap/blob/ece5ee9d9876edfdcc770032fbdce66458c6b6a9/setup.py#L204-L222

Error:

❯ poetry add "lap[alldeps]"
Using version ^0.4.0 for lap

Updating dependencies
Resolving dependencies... (0.5s)


Package operations: 5 installs, 0 updates, 0 removals

  - Installing lap (0.4.0)

[EnvCommandError]
Command ['/home/fernando/.cache/pypoetry/virtualenvs/sM4e1v81-py3.7/bin/pip', 'install', '--no-deps', 'lap==0.4.0'] errored with the following return code 1, and output:
Collecting lap==0.4.0
  Using cached https://files.pythonhosted.org/packages/bf/64/d9fb6a75b15e783952b2fec6970f033462e67db32dc43dfbb404c14e91c2/lap-0.4.0.tar.gz
Installing collected packages: lap
  Running setup.py install for lap: started
    Running setup.py install for lap: finished with status 'error'
    ERROR: Command errored out with exit status 1:
     command: /home/fernando/.cache/pypoetry/virtualenvs/sM4e1v81-py3.7/bin/python3 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-h0wwep35/lap/setup.py'"'"'; __file__='"'"'/tmp/pip-install-h0wwep35/lap/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /tmp/pip-record-fls2s3js/install-record.txt --single-version-externally-managed --compile --install-headers /home/fernando/.cache/pypoetry/virtualenvs/sM4e1v81-py3.7/include/site/python3.7/lap
         cwd: /tmp/pip-install-h0wwep35/lap/
    Complete output (12 lines):
    Partial import of lap during the build process.
    Traceback (most recent call last):
      File "/tmp/pip-install-h0wwep35/lap/setup.py", line 127, in get_numpy_status
        import numpy
    ModuleNotFoundError: No module named 'numpy'
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-install-h0wwep35/lap/setup.py", line 236, in <module>
        setup_package()
      File "/tmp/pip-install-h0wwep35/lap/setup.py", line 220, in setup_package
        raise ImportError('lap requires numpy, '
    ImportError: lap requires numpy, please "pip install numpy".
    ----------------------------------------
ERROR: Command errored out with exit status 1: /home/fernando/.cache/pypoetry/virtualenvs/sM4e1v81-py3.7/bin/python3 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-h0wwep35/lap/setup.py'"'"'; __file__='"'"'/tmp/pip-install-h0wwep35/lap/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /tmp/pip-record-fls2s3js/install-record.txt --single-version-externally-managed --compile --install-headers /home/fernando/.cache/pypoetry/virtualenvs/sM4e1v81-py3.7/include/site/python3.7/lap Check the logs for full command output.

[fgmacedo]

Thanks @gatagat. I think that a quickly approach is to declare cython and numpy as explicit requirements using install_requires, I’ve forked the repo to not be blocked by this and it indeed solved the install issue. If you’re ok with this I’ll be glad to send a PR.

Let me know if you have any other suggestion.

Best regards!

[lig]

@fgmacedo do it 😃