def _add_refs():
	files = (env.VIRAL_REF_FILES).split(",")
	for file in files:
		_add_package(dependency_URL,file % "%s.tgz",viral_dirs["REF_DIR"],"tar")
dataset/ETHPy150Open chapmanb/cloudbiolinux/cloudbio/custom/vcr.py/_add_refs/swapped operands of `%`