Inspecting environments

Listing installed packages

To list all the packages in the environment:

$ fyn pip list

To list the packages in a JSON format:

$ fyn pip list --format json

To list all the packages in the environment in a requirements.txt format:

$ fyn pip freeze

Looking up available versions

To show available versions for a package from the configured package sources:

$ fyn pip index versions numpy

Like pip index versions, fyn pip index versions filters the results to versions compatible with the selected Python target. By default, that target comes from the current Python interpreter. Use --python, --python-version, --python-platform, or --system to change the target, and use --find-links or --no-index to change the package sources being queried.

Inspecting a package

To show information about an installed package, e.g., numpy:

$ fyn pip show numpy

Multiple packages can be inspected at once.

Verifying an environment

It is possible to install packages with conflicting requirements into an environment if installed in multiple steps.

To check for conflicts or missing dependencies in the environment:

$ fyn pip check