)
filter_help_string = """\
-expression consists of 3 string selectors separated by '.' separators:
+expression consists of one or more filters separated by commas (',')
+filter consists of 3 string selectors separated by dots ('.')
<file>.<class>.<function>
test_add_bfd from test_bfd.py/BFDAPITestCase
4. '.*.test_add_bfd' selects all test functions named test_add_bfd
from all files/classes
+5. 'bfd,ip4,..test_icmp_error' selects all test functions in test_bfd.py,
+ test_ip4.py and all test functions named 'test_icmp_error' in all files
"""
parser.add_argument(
"--filter", action="store", metavar="FILTER_EXPRESSION", help=filter_help_string