Conda dependencies different from pip?

[mrclary]

@impact27, I noticed that applaunchservices installed from pip shows it has a dependency pyobjc but this is not a dependency in conda. conda tree shows only python as a dependency. This has piqued my curiosity since I can launch Spyder from an editable install from a pyenv virtual environment, but not from a conda environment. When attempting to do so, I get the following error (see also spyder-ide/spyder#17408 (comment)):

Traceback

Traceback (most recent call last):
  File "/Users/rclary/opt/miniconda3/envs/spy-dev/bin/spyder", line 33, in <module>
    sys.exit(load_entry_point('spyder', 'gui_scripts', 'spyder')())
  File "/Users/rclary/opt/miniconda3/envs/spy-dev/bin/spyder", line 25, in importlib_load_entry_point
    return next(matches).load()
  File "/Users/rclary/opt/miniconda3/envs/spy-dev/lib/python3.10/importlib/metadata/__init__.py", line 171, in load
    module = import_module(match.group('module'))
  File "/Users/rclary/opt/miniconda3/envs/spy-dev/lib/python3.10/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 883, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/Users/rclary/Documents/Repos/Spyder-IDE/spyder/spyder/app/start.py", line 47, in <module>
    from spyder.utils.external import lockfile
  File "/Users/rclary/Documents/Repos/Spyder-IDE/spyder/spyder/utils/external/lockfile.py", line 31, in <module>
    from spyder.utils.programs import is_spyder_process
  File "/Users/rclary/Documents/Repos/Spyder-IDE/spyder/spyder/utils/programs.py", line 28, in <module>
    import pkg_resources
  File "/Users/rclary/opt/miniconda3/envs/spy-dev/lib/python3.10/site-packages/pkg_resources/__init__.py", line 3260, in <module>
    def _initialize_master_working_set():
  File "/Users/rclary/opt/miniconda3/envs/spy-dev/lib/python3.10/site-packages/pkg_resources/__init__.py", line 3234, in _call_aside
    f(*args, **kwargs)
  File "/Users/rclary/opt/miniconda3/envs/spy-dev/lib/python3.10/site-packages/pkg_resources/__init__.py", line 3272, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File "/Users/rclary/opt/miniconda3/envs/spy-dev/lib/python3.10/site-packages/pkg_resources/__init__.py", line 581, in _build_master
    ws.require(__requires__)
  File "/Users/rclary/opt/miniconda3/envs/spy-dev/lib/python3.10/site-packages/pkg_resources/__init__.py", line 909, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/Users/rclary/opt/miniconda3/envs/spy-dev/lib/python3.10/site-packages/pkg_resources/__init__.py", line 795, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'pyobjc' distribution was not found and is required by applaunchservices

What don't I understand?

[impact27]

This is interesting, you need access to the objective c functions for applaunchservices to work. This must be a problem with the conda file. I will have a look next week. But maybe it was renamed pyobjc-core? https://anaconda.org/conda-forge/pyobjc-core

[mrclary]

So pip show pyobjc, where pyobjc is installed in a pip environment, shows a dependency on pyobjc-core as well as a large number of pyobjc-framework* packages. I also don't see pyobjc on any conda channels.

What is interesting is that if I install Spyder from source in a conda environment, it launches just fine; it is only if I install it in editable mode that it does not.

This works

(conda) >> pip install --no-deps .
(conda) >> spyder

This does not work

(conda) >> pip install --no-deps -e .
(conda) >> spyder

[mrclary]

I'm also wondering if applaunchservices is needed at all for the standalone macOS application.

[impact27]

I'm also wondering if applaunchservices is needed at all for the standalone macOS application.

This is a good point. If you have a standalone app you should be able to register it to open spyder. Can you try this? I guess you would just need to add a few ifs around the code that calls applaunchservices

[impact27]

Ok Now it depends on pyobjc-framework-CoreServices, but that needs to be added to conda-forge.

[mrclary]

Can this issue be closed now?