pkg_resources.DistributionNotFound: The 'ruamel_yaml' distribution was not found and is required by anaconda-project

[mforbes]

When using an editable install, pip install -e anaconda-project, running anaconda-project give the error:

pkg_resources.DistributionNotFound: The 'ruamel_yaml' distribution was not found and is required by anaconda-project

I don't understand all the details -- removing the following from the bin/anaconda-project entrypoint fixes it for example:

# for compatibility with easy_install; see #2198
__requires__ = 'anaconda-project'

however, it is probably related to the name on PyPI ruamel.yaml not ruamel_yaml.

Here is how I found this:

git clone https://github.com/Anaconda-Platform/anaconda-project.git
conda create -n ap3.8 python=3.8 pip
conda activate ap3.8
python -m pip install --no-cache-dir -e anaconda-project
anaconda-project --help

Full output

(ap3.8) $ anaconda-project --help
Traceback (most recent call last):
  File ".../.conda/envs/ap3.8/bin/anaconda-project", line 33, in <module>
    sys.exit(load_entry_point('anaconda-project', 'console_scripts', 'anaconda-project')())
  File ".../.conda/envs/ap3.8/bin/anaconda-project", line 25, in importlib_load_entry_point
    return next(matches).load()
  File ".../.conda/envs/ap3.8/lib/python3.8/importlib/metadata.py", line 77, in load
    module = import_module(match.group('module'))
  File ".../.conda/envs/ap3.8/lib/python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 843, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File ".../anaconda-project/anaconda_project/cli.py", line 13, in <module>
    import anaconda_project.internal.cli.main as cli_main
  File ".../anaconda-project/anaconda_project/internal/cli/main.py", line 16, in <module>
    from anaconda_project.internal.cli.prepare_with_mode import (UI_MODE_TEXT_ASK_QUESTIONS,
  File ".../anaconda-project/anaconda_project/internal/cli/prepare_with_mode.py", line 12, in <module>
    from anaconda_project import project_ops
  File ".../anaconda-project/anaconda_project/project_ops.py", line 20, in <module>
    from anaconda_project.project import Project, ALL_COMMAND_TYPES
  File ".../anaconda-project/anaconda_project/project.py", line 26, in <module>
    from anaconda_project.archiver import _list_relative_paths_for_unignored_project_files
  File ".../anaconda-project/anaconda_project/archiver.py", line 23, in <module>
    from conda_pack._progress import progressbar
  File ".../.conda/envs/ap3.8/lib/python3.8/site-packages/conda_pack/__init__.py", line 3, in <module>
    from .core import CondaEnv, File, CondaPackException, pack
  File ".../.conda/envs/ap3.8/lib/python3.8/site-packages/conda_pack/core.py", line 6, in <module>
    import pkg_resources
  File ".../.conda/envs/ap3.8/lib/python3.8/site-packages/pkg_resources/__init__.py", line 3243, in <module>
    def _initialize_master_working_set():
  File ".../.conda/envs/ap3.8/lib/python3.8/site-packages/pkg_resources/__init__.py", line 3226, in _call_aside
    f(*args, **kwargs)
  File ".../.conda/envs/ap3.8/lib/python3.8/site-packages/pkg_resources/__init__.py", line 3255, in _initialize_master_working_set
    working_set = WorkingSet._build_master()
  File ".../.conda/envs/ap3.8/lib/python3.8/site-packages/pkg_resources/__init__.py", line 568, in _build_master
    ws.require(__requires__)
  File ".../.conda/envs/ap3.8/lib/python3.8/site-packages/pkg_resources/__init__.py", line 886, in require
    needed = self.resolve(parse_requirements(requirements))
  File ".../.conda/envs/ap3.8/lib/python3.8/site-packages/pkg_resources/__init__.py", line 772, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'ruamel_yaml' distribution was not found and is required by anaconda-project

git clone https://github.com/Anaconda-Platform/anaconda-project.git
for py in 3.6 3.7 3.8 3.9; do
  env="ap${py}"
  conda create -yn "${env}" "python=${py}" pip
  conda activate "${env}"
  python -m pip install -e anaconda-project
  anaconda-project --help
done

Changing ruamel_yaml to ruamel.yaml in setup.py fixes this issue for python 3.6 through 3.10. (2.7 complains about from tempfile import TemporaryDirectory in project_ops.py: ImportError: cannot import name TemporaryDirectory)

[AlbertDeFusco]

This started happening to me recently. I wonder if some new version of ruamel_yaml or pip has caused this. I got around it so far by dropping -e, but that's not great