Using v0.40.0 can create peppy project without sample names.

[donaldcampbelljr]

Example:

sample_name,library,file,toggle
,anySampleType,data/frog1_data.txt,1
frog_2,anySampleType,data/frog2_data.txt,1

Can create peppy prj with missing sample name.

sample_name: None
library:     anySampleType
file:        data/frog1_data.txt
toggle:      1, Sample 'frog_2' in Project (/home/drc/GITHUB/hello_looper/hello_looper/project/project_config.yaml)

sample_name: frog_2
library:     anySampleType
file:        data/frog2_data.txt
toggle:      1]

[khoroshevskyi]

After investigating this issue, it seems it is correct behavior.
Sample name can be derived. And we have few tests for that.

peppy/tests/test_Project.py

Lines 290 to 299 in fc15511

	@pytest.mark.parametrize(
	"example_pep_cfg_noname_path", ["project_config.yaml"], indirect=True
	)
	def test_missing_sample_name_derive(self, example_pep_cfg_noname_path):
	"""
	Verify that even if sample_name column is missing in the sample table,
	it can be derived and no error is issued
	"""
	p = Project(cfg=example_pep_cfg_noname_path)
	assert SAMPLE_NAME_ATTR in p.sample_table.columns