hopefully v1.0 now means it's pretty stable. using poetry so far has been painful, the gains you got with the improved dependency resolution were unfortunately somewhat impacted by crazy annoying bugs, like `poetry shell` not actually activating the virtual environment [0]

[0] https://github.com/python-poetry/poetry/issues/571

edit: gah, still hitting baffling errors:

  $ poetry env use /usr/local/bin/python3
  [NoCompatiblePythonVersionFound]
  The specified Python version (3.7) is not
  supported by the project (^3.7).
  Please choose a compatible version or loosen the python constraint specified in the pyproject.toml file.
  $ poetry env use /usr/local/bin/python3
  [NoCompatiblePythonVersionFound]
  The specified Python version (3.7) is not
  supported by the project (>=3.7).
  Please choose a compatible version or loosen the python constraint specified in the pyproject.toml file.

v1.0.0 generally seems to work smoother though