id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
32978	Provide more informative error message on loaddata/dumpdata --format yaml when PyYAML not installed	Brad	nobody	"While the  docs at https://docs.djangoproject.com/en/3.2/topics/serialization/#serialization-formats do mention that PyYAML is required for the yaml serializer, `./manage.py dumpdata|loaddata --format yaml`, provides quite a sparse error message, ""Unable to serialize database: module yaml not found"" (from here: https://github.com/django/django/blob/fbb1984046ae00bdf0b894a6b63294395da1cce8/django/core/management/commands/dumpdata.py#L245) if PyYAML is not installed.

This could be especially confusing for new Django developers who are not aware that `yaml` is pointing to the PyYAML project on PyPI and is not a part of Django. Since yaml is the only one of the four serializers requiring an add-on third party package, it may be helpful to provide a more verbose error in this case.

For instance, something like. ""Serializing to and from YAML requires the PyYAML package. Install PyYAML to use the YAML format."""	Uncategorized	new	Core (Management commands)	3.2	Normal		serializers,yaml,dumpdata,loaddata		Unreviewed	0	0	0	0	0	0